[ICE]: `Span must not be empty and have no suggestion`

[matthiaskrgr]

auto-reduced (treereduce-rust):

//@compile-flags: -Znext-solver=globally
fn main() {
    let x_str = {
        x!("{}", x);
    };
    println!("{}", x_str);
}

original:

fn main() {
    let mut x = 4;
    let x_str = {
        x!("{}", x);
    };
    println!("{}", x_str);
}

Version information

rustc 1.95.0-nightly (a18e6d9d1 2026-01-24)
binary: rustc
commit-hash: a18e6d9d1473d9b25581dd04bef6c7577999631c
commit-date: 2026-01-24
host: x86_64-unknown-linux-gnu
release: 1.95.0-nightly
LLVM version: 21.1.8

Possibly related line of code:

rust/compiler/rustc_errors/src/diagnostic.rs

Lines 992 to 1004 in a18e6d9

	sp: Span,
	msg: impl Into<SubdiagMessage>,
	suggestion: impl ToString,
	applicability: Applicability,
	style: SuggestionStyle,
	) -> &mut Self {
	debug_assert!(
	!(sp.is_empty() && suggestion.to_string().is_empty()),
	"Span must not be empty and have no suggestion"
	);
	self.push_suggestion(CodeSuggestion {
	substitutions: vec![Substitution {
	parts: vec![SubstitutionPart { snippet: suggestion.to_string(), span: sp }],

Command:
/home/matthias/.rustup/toolchains/alt-master/bin/rustc -Znext-solver=globally

Program output

error: cannot find macro `x` in this scope
 --> /tmp/icemaker_global_tempdir.fNIuKQ5eRoc1/rustc_testrunner_tmpdir_reporting.6dIMF6yjDxBK/mvce.rs:3:9
  |
3 |         x!("{}", x);
  |         ^


thread 'rustc' (1122079) panicked at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_errors/src/diagnostic.rs:998:9:
Span must not be empty and have no suggestion
stack backtrace:
   0:     0x7f0aaaec47c0 - std[39b618b54d6f0501]::backtrace_rs::backtrace::libunwind::trace
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
   1:     0x7f0aaaec47c0 - std[39b618b54d6f0501]::backtrace_rs::backtrace::trace_unsynchronized::<std[39b618b54d6f0501]::sys::backtrace::_print_fmt::{closure#1}>
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
   2:     0x7f0aaaec47c0 - std[39b618b54d6f0501]::sys::backtrace::_print_fmt
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/backtrace.rs:74:9
   3:     0x7f0aaaec47c0 - <<std[39b618b54d6f0501]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[8437160f224edb47]::fmt::Display>::fmt
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/backtrace.rs:44:26
   4:     0x7f0aa65d40ae - <core[8437160f224edb47]::fmt::rt::Argument>::fmt
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/fmt/rt.rs:152:76
   5:     0x7f0aa65d40ae - core[8437160f224edb47]::fmt::write
   6:     0x7f0aaaedcdbc - std[39b618b54d6f0501]::io::default_write_fmt::<std[39b618b54d6f0501]::sys::stdio::unix::Stderr>
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/io/mod.rs:639:11
   7:     0x7f0aaaedcdbc - <std[39b618b54d6f0501]::sys::stdio::unix::Stderr as std[39b618b54d6f0501]::io::Write>::write_fmt
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/io/mod.rs:1994:13
   8:     0x7f0aaae8a046 - <std[39b618b54d6f0501]::sys::backtrace::BacktraceLock>::print
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/backtrace.rs:47:9
   9:     0x7f0aaae8a046 - std[39b618b54d6f0501]::panicking::default_hook::{closure#0}
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:292:27
  10:     0x7f0aaaeb3981 - std[39b618b54d6f0501]::panicking::default_hook
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:319:9
  11:     0x7f0aa799d808 - <alloc[7770521358196be1]::boxed::Box<dyn for<'a, 'b> core[8437160f224edb47]::ops::function::Fn<(&'a std[39b618b54d6f0501]::panic::PanicHookInfo<'b>,), Output = ()> + core[8437160f224edb47]::marker::Sync + core[8437160f224edb47]::marker::Send> as core[8437160f224edb47]::ops::function::Fn<(&std[39b618b54d6f0501]::panic::PanicHookInfo,)>>::call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/alloc/src/boxed.rs:2220:9
  12:     0x7f0aa799d808 - rustc_driver_impl[4a540bf6cb669a4a]::install_ice_hook::{closure#1}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_driver_impl/src/lib.rs:1491:17
  13:     0x7f0aa799d808 - <alloc[7770521358196be1]::boxed::Box<rustc_driver_impl[4a540bf6cb669a4a]::install_ice_hook::{closure#1}> as core[8437160f224edb47]::ops::function::Fn<(&dyn for<'a, 'b> core[8437160f224edb47]::ops::function::Fn<(&'a std[39b618b54d6f0501]::panic::PanicHookInfo<'b>,), Output = ()> + core[8437160f224edb47]::marker::Sync + core[8437160f224edb47]::marker::Send, &std[39b618b54d6f0501]::panic::PanicHookInfo)>>::call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/alloc/src/boxed.rs:2220:9
  14:     0x7f0aa799d808 - std[39b618b54d6f0501]::panicking::update_hook::<alloc[7770521358196be1]::boxed::Box<rustc_driver_impl[4a540bf6cb669a4a]::install_ice_hook::{closure#1}>>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:235:47
  15:     0x7f0aaaeb3cfa - <alloc[7770521358196be1]::boxed::Box<dyn for<'a, 'b> core[8437160f224edb47]::ops::function::Fn<(&'a std[39b618b54d6f0501]::panic::PanicHookInfo<'b>,), Output = ()> + core[8437160f224edb47]::marker::Sync + core[8437160f224edb47]::marker::Send> as core[8437160f224edb47]::ops::function::Fn<(&std[39b618b54d6f0501]::panic::PanicHookInfo,)>>::call
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/alloc/src/boxed.rs:2220:9
  16:     0x7f0aaaeb3cfa - std[39b618b54d6f0501]::panicking::panic_with_hook
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:833:13
  17:     0x7f0aaae8a13c - std[39b618b54d6f0501]::panicking::panic_handler::{closure#0}
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:691:13
  18:     0x7f0aaae756e9 - std[39b618b54d6f0501]::sys::backtrace::__rust_end_short_backtrace::<std[39b618b54d6f0501]::panicking::panic_handler::{closure#0}, !>
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/backtrace.rs:182:18
  19:     0x7f0aaae8c16d - __rustc[4f67f44b8da499c6]::rust_begin_unwind
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:689:5
  20:     0x7f0aa65d4adc - core[8437160f224edb47]::panicking::panic_fmt
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/panicking.rs:80:14
  21:     0x7f0aaa6bfa37 - <rustc_errors[16e081fec7c5d5ff]::diagnostic::Diag>::span_suggestion_with_style::<&str, &str>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_errors/src/diagnostic.rs:998:9
  22:     0x7f0aaa961eb8 - <rustc_errors[16e081fec7c5d5ff]::diagnostic::Diag>::span_suggestion_short::<&str, &str>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_errors/src/diagnostic.rs:1134:14
  23:     0x7f0aaa961eb8 - <rustc_trait_selection[ea19d5e248328037]::error_reporting::TypeErrCtxt>::check_for_binding_assigned_block_without_tail_expression
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs:958:17
  24:     0x7f0aaa88791c - <rustc_trait_selection[ea19d5e248328037]::error_reporting::TypeErrCtxt>::report_selection_error
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs:329:30
  25:     0x7f0aaa8f5ad9 - <rustc_trait_selection[ea19d5e248328037]::error_reporting::TypeErrCtxt>::report_fulfillment_error
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs:306:71
  26:     0x7f0aaa8f5ad9 - <rustc_trait_selection[ea19d5e248328037]::error_reporting::TypeErrCtxt>::report_fulfillment_errors
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs:259:41
  27:     0x7f0aa83c687d - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::select_obligations_where_possible::<<rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_argument_types::{closure#2}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:654:29
  28:     0x7f0aa83c687d - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_argument_types
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:439:22
  29:     0x7f0aa832a628 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::confirm_builtin_call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/callee.rs:570:14
  30:     0x7f0aa8301136 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/callee.rs:131:22
  31:     0x7f0aa8301136 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:388:50
  32:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  33:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  34:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  35:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  36:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  37:     0x7f0aa82fa012 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_hint
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:186:14
  38:     0x7f0aa82fa012 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_array
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:1678:33
  39:     0x7f0aa82fa012 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:404:43
  40:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  41:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  42:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  43:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  44:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  45:     0x7f0aa83ba1e8 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_hint
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:186:14
  46:     0x7f0aa83ba1e8 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_coercible_to_type_or_error::<<rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_coercible_to_type::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:162:23
  47:     0x7f0aa83ba1e8 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_coercible_to_type
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:152:14
  48:     0x7f0aa83ba1e8 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_decl_initializer
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:897:18
  49:     0x7f0aa83ba1e8 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_decl
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:907:32
  50:     0x7f0aa83bf2d0 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_decl_local
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:942:23
  51:     0x7f0aa83bf2d0 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_stmt
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:966:22
  52:     0x7f0aa83bf2d0 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1043:22
  53:     0x7f0aa83bf2d0 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::with_breakable_ctxt::<<rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:1492:22
  54:     0x7f0aa83bf2d0 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1041:31
  55:     0x7f0aa82f4d06 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:387:46
  56:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  57:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  58:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  59:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  60:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  61:     0x7f0aa83c6b9c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_argument_types::{closure#1}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:378:35
  62:     0x7f0aa83c6b9c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_argument_types
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:475:34
  63:     0x7f0aa832a628 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::confirm_builtin_call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/callee.rs:570:14
  64:     0x7f0aa8301136 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_call
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/callee.rs:131:22
  65:     0x7f0aa8301136 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:388:50
  66:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  67:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  68:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  69:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  70:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  71:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:210:14
  72:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_stmt
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:994:31
  73:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1043:22
  74:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::with_breakable_ctxt::<<rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:1492:22
  75:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1041:31
  76:     0x7f0aa82f4d06 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:387:46
  77:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  78:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  79:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  80:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  81:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  82:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:210:14
  83:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_stmt
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:994:31
  84:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1043:22
  85:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::with_breakable_ctxt::<<rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block::{closure#0}, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:1492:22
  86:     0x7f0aa83bf4ec - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_block
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1041:31
  87:     0x7f0aa82f4d06 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:387:46
  88:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:291:23
  89:     0x7f0aa83257e7 - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
  90:     0x7f0aa83257e7 - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::ty::Ty, <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
  91:     0x7f0aa83257e7 - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:286:18
  92:     0x7f0aa832309c - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:231:14
  93:     0x7f0aa83229ba - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_expr_with_hint
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:186:14
  94:     0x7f0aa83229ba - <rustc_hir_typeck[98395963c5ff1a67]::fn_ctxt::FnCtxt>::check_return_or_body_tail
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/expr.rs:968:35
  95:     0x7f0aa849ff57 - rustc_hir_typeck[98395963c5ff1a67]::check::check_fn
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/check.rs:130:9
  96:     0x7f0aa82c4c5d - rustc_hir_typeck[98395963c5ff1a67]::typeck_with_inspect::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/lib.rs:180:9
  97:     0x7f0aa82e2b1b - rustc_hir_typeck[98395963c5ff1a67]::typeck_with_inspect
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_typeck/src/lib.rs:105:1
  98:     0x7f0aa9c19d1e - rustc_query_impl[21f19dbf574acbb3]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:282:9
  99:     0x7f0aa9c19d1e - rustc_query_impl[21f19dbf574acbb3]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[21f19dbf574acbb3]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:552:18
 100:     0x7f0aaa07986b - rustc_query_impl[21f19dbf574acbb3]::query_impl::typeck::dynamic_query::{closure#2}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:629:25
 101:     0x7f0aaa07986b - <rustc_query_impl[21f19dbf574acbb3]::query_impl::typeck::dynamic_query::{closure#2} as core[8437160f224edb47]::ops::function::FnOnce<(rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt, rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId)>>::call_once
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/ops/function.rs:250:5
 102:     0x7f0aa9d176ea - <rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false> as rustc_query_system[b0415c2dd96ffa58]::query::config::QueryConfig<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>>::compute
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/lib.rs:116:9
 103:     0x7f0aa9d176ea - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:497:72
 104:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::enter_context::<rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:60:9
 105:     0x7f0aa9d176ea - <std[39b618b54d6f0501]::thread::local::LocalKey<core[8437160f224edb47]::cell::Cell<*const ()>>>::try_with::<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::enter_context<rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/thread/local.rs:513:12
 106:     0x7f0aa9d176ea - <std[39b618b54d6f0501]::thread::local::LocalKey<core[8437160f224edb47]::cell::Cell<*const ()>>>::with::<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::enter_context<rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/thread/local.rs:477:20
 107:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::enter_context::<rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:57:9
 108:     0x7f0aa9d176ea - <rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query::<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:156:13
 109:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_related_context::<<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:112:9
 110:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_context::<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_related_context<<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:90:36
 111:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_context_opt::<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_context<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_related_context<<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:79:18
 112:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_context::<rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_related_context<<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:90:5
 113:     0x7f0aa9d176ea - rustc_middle[d88d6cd5cfb0dbbd]::ty::context::tls::with_related_context::<<rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/ty/context/tls.rs:103:5
 114:     0x7f0aa9d176ea - <rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt as rustc_query_system[b0415c2dd96ffa58]::query::QueryContext>::start_query::<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:142:9
 115:     0x7f0aa9d176ea - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job_non_incr::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:497:22
 116:     0x7f0aa9d176ea - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::execute_job::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt, false>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:433:9
 117:     0x7f0aa9d176ea - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::try_execute_query::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_hir_id[fc38eb91a8ee5042]::OwnerId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt, false>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:376:13
 118:     0x7f0aa9e8efcc - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::get_query_non_incr::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:818:32
 119:     0x7f0aa9e8efcc - stacker[3e3eb2a5da8370fd]::maybe_grow::<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::get_query_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>
                               at /rust/deps/stacker-0.1.21/src/lib.rs:57:9
 120:     0x7f0aa9e8efcc - rustc_data_structures[8c00556bcda1036a]::stack::ensure_sufficient_stack::<rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::query::plumbing::get_query_non_incr<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/stack.rs:21:5
 121:     0x7f0aa9e8efcc - rustc_query_system[b0415c2dd96ffa58]::query::plumbing::get_query_non_incr::<rustc_query_impl[21f19dbf574acbb3]::DynamicConfig<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[21f19dbf574acbb3]::plumbing::QueryCtxt>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_system/src/query/plumbing.rs:818:5
 122:     0x7f0aa9e8efcc - rustc_query_impl[21f19dbf574acbb3]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:605:26
 123:     0x7f0aa7dcfe3e - rustc_middle[d88d6cd5cfb0dbbd]::query::inner::query_ensure::<rustc_data_structures[8c00556bcda1036a]::vec_cache::VecCache<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0415c2dd96ffa58]::dep_graph::graph::DepNodeIndex>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/query/inner.rs:51:9
 124:     0x7f0aa7dcfe3e - <rustc_middle[d88d6cd5cfb0dbbd]::query::plumbing::TyCtxtEnsureOk>::typeck::<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/query/plumbing.rs:173:9
 125:     0x7f0aa7dcfe3e - rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_analysis/src/lib.rs:254:29
 126:     0x7f0aa7dcfe3e - <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/hir/map.rs:339:79
 127:     0x7f0aa7e13e3d - rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in::<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:181:30
 128:     0x7f0aa7e13e3d - <core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}> as core[8437160f224edb47]::ops::function::FnOnce<()>>::call_once
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/panic/unwind_safe.rs:274:9
 129:     0x7f0aa7e13e3d - std[39b618b54d6f0501]::panicking::catch_unwind::do_call::<core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:581:40
 130:     0x7f0aa7e13e3d - std[39b618b54d6f0501]::panicking::catch_unwind::<(), core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:544:19
 131:     0x7f0aa7e13e3d - std[39b618b54d6f0501]::panic::catch_unwind::<core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panic.rs:359:14
 132:     0x7f0aa7e13e3d - <rustc_data_structures[8c00556bcda1036a]::sync::parallel::ParallelGuard>::run::<(), rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:23:9
 133:     0x7f0aa7e13e3d - rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in::<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:181:23
 134:     0x7f0aa7e13e3d - <core[8437160f224edb47]::slice::iter::Iter<rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId> as core[8437160f224edb47]::iter::traits::iterator::Iterator>::for_each::<rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}::{closure#1}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/slice/iter/macros.rs:301:21
 135:     0x7f0aa7e13e3d - rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in::<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:180:27
 136:     0x7f0aa7e13e3d - rustc_data_structures[8c00556bcda1036a]::sync::parallel::parallel_guard::<(), rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
 137:     0x7f0aa7e13e3d - rustc_data_structures[8c00556bcda1036a]::sync::parallel::par_for_each_in::<&rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId, &[rustc_span[cb1c21e189ad7a9f]::def_id::LocalDefId], <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>::{closure#0}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_data_structures/src/sync/parallel.rs:175:5
 138:     0x7f0aa7e13e3d - <rustc_middle[d88d6cd5cfb0dbbd]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_hir_analysis[bc0a96f402c1d791]::check_crate::{closure#2}>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_middle/src/hir/map.rs:339:9
 139:     0x7f0aa7e13e3d - rustc_hir_analysis[bc0a96f402c1d791]::check_crate
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_hir_analysis/src/lib.rs:229:9
 140:     0x7f0aa88da19d - rustc_interface[fa053fcf6d9c2fa2]::passes::run_required_analyses
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_interface/src/passes.rs:1087:5
 141:     0x7f0aa88da19d - rustc_interface[fa053fcf6d9c2fa2]::passes::analysis
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_interface/src/passes.rs:1143:5
 142:     0x7f0aa9c1a37c - rustc_query_impl[21f19dbf574acbb3]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_query_impl/src/plumbing.rs:282:9
 143:     0x7f0aa9c1a37c - rustc_query_impl[21f19dbf574acbb3]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[21f19dbf574acbb3]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d88d6cd5cfb0dbbd]::query::erase::Erased<[u8; 0usize]>>


<snip>

                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_span/src/lib.rs:143:21
 193:     0x7f0aa79867d5 - rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals::<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/compiler/rustc_interface/src/util.rs:154:17
 194:     0x7f0aa79867d5 - std[39b618b54d6f0501]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/backtrace.rs:166:18
 195:     0x7f0aa79aa253 - std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked::<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}::{closure#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/thread/lifecycle.rs:91:13
 196:     0x7f0aa79aa253 - <core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}::{closure#0}> as core[8437160f224edb47]::ops::function::FnOnce<()>>::call_once
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/panic/unwind_safe.rs:274:9
 197:     0x7f0aa79aa253 - std[39b618b54d6f0501]::panicking::catch_unwind::do_call::<core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}::{closure#0}>, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:581:40
 198:     0x7f0aa79aa253 - std[39b618b54d6f0501]::panicking::catch_unwind::<(), core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}::{closure#0}>>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panicking.rs:544:19
 199:     0x7f0aa79aa253 - std[39b618b54d6f0501]::panic::catch_unwind::<core[8437160f224edb47]::panic::unwind_safe::AssertUnwindSafe<std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}::{closure#0}>, ()>
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/panic.rs:359:14
 200:     0x7f0aa79aa253 - std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked::<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/thread/lifecycle.rs:89:26
 201:     0x7f0aa79aa253 - <std[39b618b54d6f0501]::thread::lifecycle::spawn_unchecked<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_with_globals<rustc_interface[fa053fcf6d9c2fa2]::util::run_in_thread_pool_with_globals<rustc_interface[fa053fcf6d9c2fa2]::interface::run_compiler<(), rustc_driver_impl[4a540bf6cb669a4a]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[8437160f224edb47]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /rustc-dev/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/core/src/ops/function.rs:250:5
 202:     0x7f0aaaec15ef - <alloc[7770521358196be1]::boxed::Box<dyn core[8437160f224edb47]::ops::function::FnOnce<(), Output = ()> + core[8437160f224edb47]::marker::Send> as core[8437160f224edb47]::ops::function::FnOnce<()>>::call_once
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/alloc/src/boxed.rs:2206:9
 203:     0x7f0aaaec15ef - <std[39b618b54d6f0501]::sys::thread::unix::Thread>::new::thread_start
                               at /rustc/a18e6d9d1473d9b25581dd04bef6c7577999631c/library/std/src/sys/thread/unix.rs:127:17
 204:     0x7f0aa4a9698b - <unknown>
 205:     0x7f0aa4b1a9cc - <unknown>
 206:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: please make sure that you have updated to the latest nightly

note: rustc 1.95.0-nightly (a18e6d9d1 2026-01-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z next-solver=globally -Z dump-mir-dir=dir

query stack during panic:
#0 [typeck] type-checking `main`
#1 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 1 previous error

@rustbot label +WG-trait-system-refactor

[matthiaskrgr]

old solver

error[E0277]: `()` doesn't implement `std::fmt::Display`
 --> a.rs:6:20
  |
3 |       let x_str = {
  |  _________________-
4 | |         x!("{}", x);
5 | |     };
  | |_____- this block is missing a tail expression
6 |       println!("{}", x_str);
  |                 --   ^^^^^ `()` cannot be formatted with the default formatter
  |                 |
  |                 required by this formatting parameter
  |
  = help: the trait `std::fmt::Display` is not implemented for `()`
  = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
  = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 2 previous errors

new solver

error[E0277]: `()` doesn't implement `std::fmt::Display`
 --> a.rs:6:20
  |
4 |         x!("{}", x);
  |                    - help: remove this semicolon
5 |     };
6 |     println!("{}", x_str);
  |               --   ^^^^^ `()` cannot be formatted with the default formatter
  |               |
  |               required by this formatting parameter
  |
  = help: the trait `std::fmt::Display` is not implemented for `()`
  = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
  = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)