ICE bootstrapping rustc with incremental cache

[jyn514]

Code

jyn514@0fa56d7
with this diff applied:

diff --git a/compiler/rustc_typeck/src/check/op.rs b/compiler/rustc_typeck/src/check/op.rs
index 74516acbfcf..6aa7f96d800 100644
--- a/compiler/rustc_typeck/src/check/op.rs
+++ b/compiler/rustc_typeck/src/check/op.rs
@@ -10,7 +10,7 @@
     Adjust, Adjustment, AllowTwoPhase, AutoBorrow, AutoBorrowMutability,
 };
 use rustc_middle::ty::fold::TypeFolder;
-use rustc_middle::ty::TyKind::{Adt, Array, Char, FnDef, Never, Ref, Str, Tuple, Uint};
+use rustc_middle::ty::TyKind::{Array, Char, FnDef, Never, Ref, Str, Tuple, Uint};
 use rustc_middle::ty::{
     self, suggest_constraining_type_param, Ty, TyCtxt, TypeFoldable, TypeVisitor,
 };
@@ -426,15 +426,7 @@ fn check_overloaded_binop(
                     let mut visitor = TypeParamVisitor(vec![]);
                     visitor.visit_ty(lhs_ty);
 
-                    if op.node == hir::BinOpKind::Add
-                        && self.check_str_addition(
-                            lhs_expr, rhs_expr, lhs_ty, rhs_ty, &mut err, is_assign, op,
-                        )
-                    {
-                        // This has nothing here because it means we did string
-                        // concatenation (e.g., "Hello " + "World!"). This means
-                        // we don't want the note in the else clause to be emitted
-                    } else if let [ty] = &visitor.0[..] {
+                    if let [ty] = &visitor.0[..] {
                         if let ty::Param(p) = *ty.kind() {
                             // Check if the method would be found if the type param wasn't
                             // involved. If so, it means that adding a trait bound to the param is
@@ -534,96 +526,6 @@ fn add_type_neq_err_label(
         false
     }
 
-    /// Provide actionable suggestions when trying to add two strings with incorrect types,
-    /// like `&str + &str`, `String + String` and `&str + &String`.
-    ///
-    /// If this function returns `true` it means a note was printed, so we don't need
-    /// to print the normal "implementation of `std::ops::Add` might be missing" note
-    fn check_str_addition(
-        &self,
-        lhs_expr: &'tcx hir::Expr<'tcx>,
-        rhs_expr: &'tcx hir::Expr<'tcx>,
-        lhs_ty: Ty<'tcx>,
-        rhs_ty: Ty<'tcx>,
-        err: &mut rustc_errors::DiagnosticBuilder<'_>,
-        is_assign: IsAssign,
-        op: hir::BinOp,
-    ) -> bool {
-        let str_concat_note = "string concatenation requires an owned `String` on the left";
-        let rm_borrow_msg = "remove the borrow to obtain an owned `String`";
-        let to_owned_msg = "create an owned `String` from a string reference";
-
-        let string_type = self.tcx.get_diagnostic_item(sym::String);
-        let is_std_string = |ty: Ty<'tcx>| match ty.ty_adt_def() {
-            Some(ty_def) => Some(ty_def.did) == string_type,
-            None => false,
-        };
-
-        match (lhs_ty.kind(), rhs_ty.kind()) {
-            (&Ref(_, l_ty, _), &Ref(_, r_ty, _)) // &str or &String + &str, &String or &&str
-                if (*l_ty.kind() == Str || is_std_string(l_ty)) && (
-                        *r_ty.kind() == Str || is_std_string(r_ty) ||
-                        &format!("{:?}", rhs_ty) == "&&str"
-                    ) =>
-            {
-                if let IsAssign::No = is_assign { // Do not supply this message if `&str += &str`
-                    err.span_label(op.span, "`+` cannot be used to concatenate two `&str` strings");
-                    err.note(str_concat_note);
-                    if let hir::ExprKind::AddrOf(_, _, lhs_inner_expr) = lhs_expr.kind {
-                        err.span_suggestion_verbose(
-                            lhs_expr.span.until(lhs_inner_expr.span),
-                            rm_borrow_msg,
-                            "".to_owned(),
-                            Applicability::MachineApplicable
-                        );
-                    } else {
-                        err.span_suggestion_verbose(
-                            lhs_expr.span.shrink_to_hi(),
-                            to_owned_msg,
-                            ".to_owned()".to_owned(),
-                            Applicability::MachineApplicable
-                        );
-                    }
-                }
-                true
-            }
-            (&Ref(_, l_ty, _), &Adt(..)) // Handle `&str` & `&String` + `String`
-                if (*l_ty.kind() == Str || is_std_string(l_ty)) && is_std_string(rhs_ty) =>
-            {
-                err.span_label(
-                    op.span,
-                    "`+` cannot be used to concatenate a `&str` with a `String`",
-                );
-                match is_assign {
-                    IsAssign::No => {
-                        let sugg_msg;
-                        let lhs_sugg = if let hir::ExprKind::AddrOf(_, _, lhs_inner_expr) = lhs_expr.kind {
-                            sugg_msg = "remove the borrow on the left and add one on the right";
-                            (lhs_expr.span.until(lhs_inner_expr.span), "".to_owned())
-                        } else {
-                            sugg_msg = "create an owned `String` on the left and add a borrow on the right";
-                            (lhs_expr.span.shrink_to_hi(), ".to_owned()".to_owned())
-                        };
-                        let suggestions = vec![
-                            lhs_sugg,
-                            (rhs_expr.span.shrink_to_lo(), "&".to_owned()),
-                        ];
-                        err.multipart_suggestion_verbose(
-                            sugg_msg,
-                            suggestions,
-                            Applicability::MachineApplicable,
-                        );
-                    }
-                    IsAssign::Yes => {
-                        err.note(str_concat_note);
-                    }
-                }
-                true
-            }
-            _ => false,
-        }
-    }
-
     pub fn check_user_unop(
         &self,
         ex: &'tcx hir::Expr<'tcx>,

Meta

rustc --version --verbose:

note: rustc 1.59.0-beta.5 (28c8a34e1 2022-01-27) running on x86_64-unknown-linux-gnu

Error output

thread 'rustc' panicked at 'index out of bounds: the len is 906 but the index is 976', compiler/rustc_query_impl/src/on_disk_cache.rs:726:18

Backtrace

Building stage0 compiler artifacts (x86_64-unknown-linux-gnu(x86_64-unknown-linux-gnu) -> x86_64-unknown-linux-gnu(x86_64-unknown-linux-gnu))
   Compiling rustc_typeck v0.0.0 (/home/jnelson/rust-lang/rust/compiler/rustc_typeck)
   Compiling rustc_privacy v0.0.0 (/home/jnelson/rust-lang/rust/compiler/rustc_privacy)
   Compiling rustc_interface v0.0.0 (/home/jnelson/rust-lang/rust/compiler/rustc_interface)
stack backtrace:
   0: rust_begin_unwind
             at /rustc/28c8a34e18fc05277c81328d1bbf5ed931f4d22e/library/std/src/panicking.rs:498:5
   1: core::panicking::panic_fmt
             at /rustc/28c8a34e18fc05277c81328d1bbf5ed931f4d22e/library/core/src/panicking.rs:107:14
   2: core::panicking::panic_bounds_check
             at /rustc/28c8a34e18fc05277c81328d1bbf5ed931f4d22e/library/core/src/panicking.rs:75:5
   3: <rustc_span::span_encoding::Span as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   4: <rustc_middle::ty::VariantDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   5: <rustc_query_impl::on_disk_cache::CacheDecoder as rustc_serialize::serialize::Decoder>::read_seq::<alloc::vec::Vec<rustc_middle::ty::VariantDef>, <alloc::vec::Vec<rustc_middle::ty::VariantDef> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>
   6: <rustc_middle::ty::adt::AdtDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   7: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   8: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   9: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  10: <smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]> as core::iter::traits::collect::Extend<rustc_middle::ty::subst::GenericArg>>::extend::<core::iter::adapters::ResultShunt<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, alloc::string::String>>
  11: core::iter::adapters::process_results::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, rustc_middle::ty::subst::GenericArg, alloc::string::String, <core::result::Result<smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>, alloc::string::String> as core::iter::traits::collect::FromIterator<core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String>>>::from_iter<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}, smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>>
  12: <core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<rustc_middle::ty::subst::GenericArg, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_substs<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}>
  13: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  14: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  15: <smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]> as core::iter::traits::collect::Extend<rustc_middle::ty::subst::GenericArg>>::extend::<core::iter::adapters::ResultShunt<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, alloc::string::String>>
  16: core::iter::adapters::process_results::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, rustc_middle::ty::subst::GenericArg, alloc::string::String, <core::result::Result<smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>, alloc::string::String> as core::iter::traits::collect::FromIterator<core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String>>>::from_iter<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}, smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>>
  17: <core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<rustc_middle::ty::subst::GenericArg, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_substs<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}>
  18: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  19: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  20: <smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]> as core::iter::traits::collect::Extend<rustc_middle::ty::subst::GenericArg>>::extend::<core::iter::adapters::ResultShunt<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, alloc::string::String>>
  21: core::iter::adapters::process_results::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, rustc_middle::ty::subst::GenericArg, alloc::string::String, <core::result::Result<smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>, alloc::string::String> as core::iter::traits::collect::FromIterator<core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String>>>::from_iter<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}, smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]>>
  22: <rustc_middle::ty::context::TyCtxt>::mk_substs::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>
  23: <rustc_middle::traits::ImplSource<()> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  24: <core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  25: <rustc_query_impl::on_disk_cache::OnDiskCache>::try_load_query_result::<core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>>
  26: <<rustc_query_impl::queries::codegen_fulfill_obligation as rustc_query_system::query::config::QueryDescription<rustc_query_impl::plumbing::QueryCtxt>>::TRY_LOAD_FROM_DISK::{closure#0} as core::ops::function::FnOnce<(rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::dep_graph::serialized::SerializedDepNodeIndex)>>::call_once
  27: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, (rustc_middle::ty::ParamEnv, rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::TraitRef>), core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>>
  28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(rustc_middle::ty::ParamEnv, rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::TraitRef>), core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>>>
  29: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::codegen_fulfill_obligation
  30: rustc_ty_utils::instance::inner_resolve_instance
  31: rustc_ty_utils::instance::resolve_instance
  32: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, rustc_middle::ty::ParamEnvAnd<(rustc_span::def_id::DefId, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>)>, core::result::Result<core::option::Option<rustc_middle::ty::instance::Instance>, rustc_errors::ErrorReported>>
  33: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::resolve_instance, rustc_query_impl::plumbing::QueryCtxt>
  34: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::resolve_instance
  35: <rustc_middle::ty::instance::Instance>::resolve
  36: rustc_monomorphize::collector::collect_neighbours
  37: rustc_monomorphize::collector::collect_items_rec
  38: rustc_monomorphize::collector::collect_items_rec
  39: rustc_monomorphize::collector::collect_items_rec
  40: rustc_monomorphize::collector::collect_items_rec
  41: rustc_monomorphize::collector::collect_items_rec
  42: rustc_monomorphize::collector::collect_items_rec
  43: rustc_monomorphize::collector::collect_items_rec
  44: rustc_monomorphize::collector::collect_items_rec
  45: rustc_monomorphize::collector::collect_items_rec
  46: rustc_monomorphize::collector::collect_items_rec
  47: rustc_monomorphize::collector::collect_items_rec
  48: rustc_monomorphize::collector::collect_items_rec
  49: rustc_monomorphize::collector::collect_items_rec
  50: rustc_monomorphize::collector::collect_items_rec
  51: rustc_monomorphize::collector::collect_items_rec
  52: rustc_monomorphize::collector::collect_items_rec
  53: rustc_monomorphize::collector::collect_items_rec
  54: rustc_monomorphize::collector::collect_items_rec
  55: rustc_monomorphize::collector::collect_items_rec
  56: rustc_monomorphize::collector::collect_items_rec
  57: rustc_monomorphize::collector::collect_items_rec
  58: rustc_monomorphize::collector::collect_items_rec
  59: rustc_monomorphize::collector::collect_items_rec
  60: rustc_monomorphize::collector::collect_items_rec
  61: rustc_monomorphize::collector::collect_items_rec
  62: <rustc_session::session::Session>::time::<(), rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}>
  63: rustc_monomorphize::collector::collect_crate_mono_items
  64: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  65: <rustc_middle::dep_graph::dep_node::DepKind as rustc_query_system::dep_graph::DepKind>::with_deps::<<rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task_impl<rustc_middle::ty::context::TyCtxt, (), (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>::{closure#0}, (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>
  66: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>
  67: rustc_data_structures::stack::ensure_sufficient_stack::<((&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit]), rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, (), (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>::{closure#3}>
  68: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>>
  69: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::collect_and_partition_mono_items, rustc_query_impl::plumbing::QueryCtxt>
  70: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::collect_and_partition_mono_items
  71: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
  72: <rustc_session::session::Session>::time::<alloc::boxed::Box<dyn core::any::Any>, rustc_interface::passes::start_codegen::{closure#0}>
  73: <rustc_interface::queries::Queries>::ongoing_codegen
  74: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorReported>>
  75: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  76: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

note: 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: rustc 1.59.0-beta.5 (28c8a34e1 2022-01-27) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z macro-backtrace -Z tls-model=initial-exec -Z unstable-options -Z binary-dep-depinfo -Z force-unstable-if-unmarked -C opt-level=3 -C embed-bitcode=no -C debuginfo=0 -C incremental -C symbol-mangling-version=v0 -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -C prefer-dynamic -C llvm-args=-import-instr-limit=10 --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [codegen_fulfill_obligation] checking if `core::ops::function::FnMut` fulfills its obligations
#1 [resolve_instance] resolving instance `<[closure@core::iter::adapters::copied::copy_try_fold<rustc_middle::ty::subst::GenericArg, (), core::ops::control_flow::ControlFlow<!>, [closure@core::iter::traits::iterator::Iterator::try_for_each::call<rustc_middle::ty::subst::GenericArg, core::ops::control_flow::ControlFlow<!>, [closure@rustc_middle::ty::subst::<impl rustc_middle::ty::fold::TypeFoldable for &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>::super_visit_with<check::op::TypeParamVisitor>::{closure#0}]>::{closure#0}]>::{closure#0}] as core::ops::function::FnMut<((), &rustc_middle::ty::subst::GenericArg)>>::call_mut`
#2 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
error: could not compile `rustc_typeck`

[compiler-errors]

+1, I've been getting these all the time when bootstrapping rust. Basically always have to ./x.py clean before building after a nontrivial change.

I think this might be related to the the issues that @Aaron1011 was fixing like last month about incremental compilation bugs on nightly (e.g. #92534) but which aren't on beta yet, which we use to bootstrap?

[jyn514]

@compiler-errors you can make it much faster to rebuild by running rm -r target/x86_64-unknown-linux-gnu/stage0-rustc/x86_64-unknown-linux-gnu/release/incremental/ instead of a full x.py clean

[compiler-errors]

Maybe we could add a flag to x to bootstrap with a custom compiler artifact, like nightly-2022-02-09? Is that a bad idea? If not, I might look into it.

This is obviously a bandaid for when beta is particularly ICE-prone, but maybe it could be useful for other things...

[Mark-Simulacrum]

rustc = ... in config.toml is something that's already supported -- you can point it at a nightly toolchain and things should largely just work (presuming it's recent enough etc).

[workingjubilee]

Closing as (a duplicate|resolved|a resolved duplicate).