ICE: Failed to normalize ... maybe try to call try_normalize_erasing_regions instead

[cyphar]

Code

Trying to build itertools 0.14.0 with cargo +nightly llvm-cov on nightly results in an ICE. I don't have a minimal reproducer, unfortunately -- cargo +nightly llvm-cov fails with an ICE if you try to build a project like https://github.com/openSUSE/libpathrs (crate pathrs).

Meta

rustc +nightly --version --verbose:

rustc 1.86.0-nightly (a580b5c37 2025-01-08)
binary: rustc
commit-hash: a580b5c379b4fca50dfe5afc0fc0ce00921e4e00
commit-date: 2025-01-08
host: x86_64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 19.1.6

Error output

error: internal compiler error: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:168:90: Failed to normalize ziptuple::Zip<(Alias(Projection, AliasTy { args: [A/#0], def_id: DefId(2:8746 ~ core[6b5c]::iter::traits::collect::IntoIterator::IntoIter), .. }),)>, maybe try to call `try_normalize_erasing_regions` instead


thread 'rustc' panicked at compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:168:90:
Box<dyn Any>
<snip>

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: please attach the file at `/home/cyphar/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/itertools-0.14.0/rustc-ice-2025-01-10T00_27_04-168132.txt` to your bug report

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C instrument-coverage -Z coverage-options=branch

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

query stack during panic:
#0 [symbol_name] computing the symbol for `ziptuple::<impl at /home/cyphar/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/itertools-0.14.0/src/ziptuple.rs:49:9: 49:81>::from`
end of query stack
error: could not compile `itertools` (lib)

Backtrace

thread 'rustc' panicked at compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:168:90:
Box<dyn Any>
stack backtrace:
   0:     0x7ff75a8e3a7a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hc48a3003e72a1fb5
   1:     0x7ff75b013126 - core::fmt::write::h244b471aa97315bd
   2:     0x7ff75bf22211 - std::io::Write::write_fmt::h63cacec38f2c7922
   3:     0x7ff75a8e38d2 - std::sys::backtrace::BacktraceLock::print::h8e88b30882062ce8
   4:     0x7ff75a8e5e77 - std::panicking::default_hook::{{closure}}::he2b2f35b61e5b6b4
   5:     0x7ff75a8e5c60 - std::panicking::default_hook::h2b9fc43053d2ca15
   6:     0x7ff759a568a8 - std[c08ade969ea4a026]::panicking::update_hook::<alloc[ecf666bc700c7d64]::boxed::Box<rustc_driver_impl[7ccddf7307cff907]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x7ff75a8e66c3 - std::panicking::rust_panic_with_hook::h1126dbe971a7f919
   8:     0x7ff759a8ecc1 - std[c08ade969ea4a026]::panicking::begin_panic::<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>::{closure#0}
   9:     0x7ff759a83ea6 - std[c08ade969ea4a026]::sys::backtrace::__rust_end_short_backtrace::<std[c08ade969ea4a026]::panicking::begin_panic<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>::{closure#0}, !>
  10:     0x7ff759a83c63 - std[c08ade969ea4a026]::panicking::begin_panic::<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>
  11:     0x7ff759a98c21 - <rustc_errors[1eaa06d4a73dafc5]::diagnostic::BugAbort as rustc_errors[1eaa06d4a73dafc5]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7ff75a06db03 - rustc_middle[bc4ae9fc2bf4235a]::util::bug::opt_span_bug_fmt::<rustc_span[cfc513d191a8d813]::span_encoding::Span>::{closure#0}
  13:     0x7ff75a052b1a - rustc_middle[bc4ae9fc2bf4235a]::ty::context::tls::with_opt::<rustc_middle[bc4ae9fc2bf4235a]::util::bug::opt_span_bug_fmt<rustc_span[cfc513d191a8d813]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7ff75a0529ab - rustc_middle[bc4ae9fc2bf4235a]::ty::context::tls::with_context_opt::<rustc_middle[bc4ae9fc2bf4235a]::ty::context::tls::with_opt<rustc_middle[bc4ae9fc2bf4235a]::util::bug::opt_span_bug_fmt<rustc_span[cfc513d191a8d813]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7ff7581d3d20 - rustc_middle[bc4ae9fc2bf4235a]::util::bug::bug_fmt
  16:     0x7ff75b60f12f - <rustc_middle[bc4ae9fc2bf4235a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder as rustc_type_ir[72683c14ceefff53]::fold::TypeFolder<rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>>::fold_ty
  17:     0x7ff75c28b3c5 - <&rustc_middle[bc4ae9fc2bf4235a]::ty::list::RawList<(), rustc_middle[bc4ae9fc2bf4235a]::ty::generic_args::GenericArg> as rustc_type_ir[72683c14ceefff53]::fold::TypeFoldable<rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[bc4ae9fc2bf4235a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder>
  18:     0x7ff75a5afe45 - <rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>::normalize_erasing_regions::<rustc_type_ir[72683c14ceefff53]::predicate::TraitRef<rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>>
  19:     0x7ff75a5bcb75 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_impl_path
  20:     0x7ff75a5bc0b9 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_def_path
  21:     0x7ff75a5bc7a5 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_def_path
  22:     0x7ff75a5bbbd0 - rustc_symbol_mangling[403ef980f7f2d81]::v0::mangle
  23:     0x7ff75bb226ae - rustc_symbol_mangling[403ef980f7f2d81]::symbol_name_provider
  24:     0x7ff75bb2112a - rustc_query_impl[9bbd9b92042adb73]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9bbd9b92042adb73]::query_impl::symbol_name::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bc4ae9fc2bf4235a]::query::erase::Erased<[u8; 16usize]>>
  25:     0x7ff75bb200b7 - rustc_query_system[7c1448542a492b7f]::query::plumbing::try_execute_query::<rustc_query_impl[9bbd9b92042adb73]::DynamicConfig<rustc_query_system[7c1448542a492b7f]::query::caches::DefaultCache<rustc_middle[bc4ae9fc2bf4235a]::ty::instance::Instance, rustc_middle[bc4ae9fc2bf4235a]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[9bbd9b92042adb73]::plumbing::QueryCtxt, false>
  26:     0x7ff75bb1fd22 - rustc_query_impl[9bbd9b92042adb73]::query_impl::symbol_name::get_query_non_incr::__rust_end_short_backtrace
  27:     0x7ff75bba968c - rustc_middle[bc4ae9fc2bf4235a]::query::plumbing::query_get_at::<rustc_query_system[7c1448542a492b7f]::query::caches::DefaultCache<rustc_middle[bc4ae9fc2bf4235a]::ty::instance::Instance, rustc_middle[bc4ae9fc2bf4235a]::query::erase::Erased<[u8; 16usize]>>>
  28:     0x7ff7598dd915 - rustc_codegen_llvm[cf0745383bf2fa70]::coverageinfo::mapgen::finalize
  29:     0x7ff75bb3e458 - rustc_codegen_llvm[cf0745383bf2fa70]::base::compile_codegen_unit::module_codegen
  30:     0x7ff75bfe9dc8 - <rustc_codegen_llvm[cf0745383bf2fa70]::LlvmCodegenBackend as rustc_codegen_ssa[8aad7319a10dd306]::traits::backend::ExtraBackendMethods>::compile_codegen_unit
  31:     0x7ff75bfe612c - <rustc_codegen_llvm[cf0745383bf2fa70]::LlvmCodegenBackend as rustc_codegen_ssa[8aad7319a10dd306]::traits::backend::CodegenBackend>::codegen_crate
  32:     0x7ff75bfee124 - <rustc_interface[9ea0a400d5371a28]::queries::Linker>::codegen_and_build_linker
  33:     0x7ff75bf58892 - rustc_interface[9ea0a400d5371a28]::passes::create_and_enter_global_ctxt::<core[6b5cbebef9c0da3b]::option::Option<rustc_interface[9ea0a400d5371a28]::queries::Linker>, rustc_driver_impl[7ccddf7307cff907]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  34:     0x7ff75bfcba64 - rustc_interface[9ea0a400d5371a28]::interface::run_compiler::<(), rustc_driver_impl[7ccddf7307cff907]::run_compiler::{closure#0}>::{closure#1}
  35:     0x7ff75be2d651 - std[c08ade969ea4a026]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[9ea0a400d5371a28]::util::run_in_thread_with_globals<rustc_interface[9ea0a400d5371a28]::util::run_in_thread_pool_with_globals<rustc_interface[9ea0a400d5371a28]::interface::run_compiler<(), rustc_driver_impl[7ccddf7307cff907]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  36:     0x7ff75be2db08 - <<std[c08ade969ea4a026]::thread::Builder>::spawn_unchecked_<rustc_interface[9ea0a400d5371a28]::util::run_in_thread_with_globals<rustc_interface[9ea0a400d5371a28]::util::run_in_thread_pool_with_globals<rustc_interface[9ea0a400d5371a28]::interface::run_compiler<(), rustc_driver_impl[7ccddf7307cff907]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[6b5cbebef9c0da3b]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x7ff75be2f0af - std::sys::pal::unix::thread::Thread::new::thread_start::h2f2b51e924b57f78
  38:     0x7ff7560983b2 - __pthread_rwlock_wrlock_full64
                               at /usr/src/debug/glibc-2.39/nptl/pthread_rwlock_common.c:685:9
  39:     0x7ff7560983b2 - ___pthread_rwlock_clockwrlock64
                               at /usr/src/debug/glibc-2.39/nptl/pthread_rwlock_clockwrlock.c:28:10
  40:     0x7ff75611d5fc - fill_in_uparams
                               at /usr/src/debug/glibc-2.39/argp/argp-help.c:202:6
  41:     0x7ff75611d5fc - _help
                               at /usr/src/debug/glibc-2.39/argp/argp-help.c:1674:3
  42:                0x0 - <unknown>

rustc-ice-2025-01-10T00_27_04-168132.txt

[lukas-code]

Thanks for the report! This is a duplicate of #135235 and is fixed in tomorrow's nightly.