ICE: Failed to normalize while compiling smallvec

[djc]

Encountered in Hickory-DNS CI, in the coverage run:

cargo +nightly llvm-cov test --workspace --no-report --all-targets --all-features

error: internal compiler error: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:168:90: Failed to normalize [Alias(Projection, AliasTy { args: [A/#0], def_id: DefId(0:329 ~ smallvec[15dc]::Array::Item), .. })], 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>
stack backtrace:
   0:     0x7f5e434e3a7a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hc48a3003e72a1fb5
   1:     0x7f5e43c13126 - core::fmt::write::h244b471aa97315bd
   2:     0x7f5e44b22211 - std::io::Write::write_fmt::h63cacec38f2c7922
   3:     0x7f5e434e38d2 - std::sys::backtrace::BacktraceLock::print::h8e88b30882062ce8
   4:     0x7f5e434e5e77 - std::panicking::default_hook::{{closure}}::he2b2f35b61e5b6b4
   5:     0x7f5e434e5c60 - std::panicking::default_hook::h2b9fc43053d2ca15
   6:     0x7f5e426568a8 - std[c08ade969ea4a026]::panicking::update_hook::<alloc[ecf666bc700c7d64]::boxed::Box<rustc_driver_impl[7ccddf7307cff907]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x7f5e434e66c3 - std::panicking::rust_panic_with_hook::h1126dbe971a7f919
   8:     0x7f5e4268ecc1 - std[c08ade969ea4a026]::panicking::begin_panic::<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>::{closure#0}
   9:     0x7f5e42683ea6 - std[c08ade969ea4a026]::sys::backtrace::__rust_end_short_backtrace::<std[c08ade969ea4a026]::panicking::begin_panic<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>::{closure#0}, !>
  10:     0x7f5e42683c63 - std[c08ade969ea4a026]::panicking::begin_panic::<rustc_errors[1eaa06d4a73dafc5]::ExplicitBug>
  11:     0x7f5e42698c21 - <rustc_errors[1eaa06d4a73dafc5]::diagnostic::BugAbort as rustc_errors[1eaa06d4a73dafc5]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f5e42c6db03 - rustc_middle[bc4ae9fc2bf4235a]::util::bug::opt_span_bug_fmt::<rustc_span[cfc513d191a8d813]::span_encoding::Span>::{closure#0}
  13:     0x7f5e42c52b1a - 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:     0x7f5e42c529ab - 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:     0x7f5e40dd3d20 - rustc_middle[bc4ae9fc2bf4235a]::util::bug::bug_fmt
  16:     0x7f5e4420f12f - <rustc_middle[bc4ae9fc2bf4235a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder as rustc_type_ir[72683c14ceefff53]::fold::TypeFolder<rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>>::fold_ty
  17:     0x7f5e44e8b3f6 - <&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:     0x7f5e431afe45 - <rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>::normalize_erasing_regions::<rustc_type_ir[72683c14ceefff53]::predicate::TraitRef<rustc_middle[bc4ae9fc2bf4235a]::ty::context::TyCtxt>>
  19:     0x7f5e431bcb75 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_impl_path
  20:     0x7f5e431bc0b9 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_def_path
  21:     0x7f5e431bc7a5 - <rustc_symbol_mangling[403ef980f7f2d81]::v0::SymbolMangler as rustc_middle[bc4ae9fc2bf4235a]::ty::print::Printer>::print_def_path
  22:     0x7f5e431bbbd0 - rustc_symbol_mangling[403ef980f7f2d81]::v0::mangle
  23:     0x7f5e447226ae - rustc_symbol_mangling[403ef980f7f2d81]::symbol_name_provider
  24:     0x7f5e4472112a - 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:     0x7f5e447200b7 - 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:     0x7f5e4471fd22 - rustc_query_impl[9bbd9b92042adb73]::query_impl::symbol_name::get_query_non_incr::__rust_end_short_backtrace
  27:     0x7f5e447a968c - 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:     0x7f5e424dd915 - rustc_codegen_llvm[cf0745383bf2fa70]::coverageinfo::mapgen::finalize
  29:     0x7f5e4473e458 - rustc_codegen_llvm[cf0745383bf2fa70]::base::compile_codegen_unit::module_codegen
  30:     0x7f5e44be9dc8 - <rustc_codegen_llvm[cf0745383bf2fa70]::LlvmCodegenBackend as rustc_codegen_ssa[8aad7319a10dd306]::traits::backend::ExtraBackendMethods>::compile_codegen_unit
  31:     0x7f5e44be612c - <rustc_codegen_llvm[cf0745383bf2fa70]::LlvmCodegenBackend as rustc_codegen_ssa[8aad7319a10dd306]::traits::backend::CodegenBackend>::codegen_crate
  32:     0x7f5e44bee124 - <rustc_interface[9ea0a400d5371a28]::queries::Linker>::codegen_and_build_linker
  33:     0x7f5e44b58892 - 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:     0x7f5e44bcba64 - rustc_interface[9ea0a400d5371a28]::interface::run_compiler::<(), rustc_driver_impl[7ccddf7307cff907]::run_compiler::{closure#0}>::{closure#1}
  35:     0x7f5e44a2d651 - 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:     0x7f5e44a2db08 - <<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:     0x7f5e44a2f0af - std::sys::pal::unix::thread::Thread::new::thread_start::h2f2b51e924b57f78
  38:     0x7f5e3ec94ac3 - <unknown>
  39:     0x7f5e3ed26850 - <unknown>
  40:                0x0 - <unknown>

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/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/smallvec-1.13.2/rustc-ice-2025-01-09T20_44_02-2178.txt` to your bug report

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C instrument-coverage -C llvm-args=--instrprof-atomic-counter-update-all -C instrument-coverage

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

query stack during panic:
#0 [symbol_name] computing the symbol for `<impl at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/smallvec-1.13.2/src/lib.rs:1864:1: 1864:48>::as_ref`
end of query stack
error: could not compile `smallvec` (lib)

Caused by:
  process didn't exit successfully: `/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --crate-name smallvec --edition=2018 /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/smallvec-1.13.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="const_generics"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("arbitrary", "const_generics", "const_new", "debugger_visualizer", "drain_filter", "drain_keep_rest", "may_dangle", "serde", "specialization", "union", "write"))' -C metadata=0293611f57917555 -C extra-filename=-1420f6d37103f44c --out-dir /home/runner/work/hickory-dns/hickory-dns/target/llvm-cov-target/debug/deps -L dependency=/home/runner/work/hickory-dns/hickory-dns/target/llvm-cov-target/debug/deps --cap-lints allow -C instrument-coverage -C llvm-args=--instrprof-atomic-counter-update-all --cfg=coverage --cfg=trybuild_no_target -C instrument-coverage --cfg=coverage --cfg=coverage_nightly --cfg=trybuild_no_target` (exit status: 101)
warning: build failed, waiting for other jobs to finish...
error: process didn't exit successfully: `/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/cargo test --manifest-path /home/runner/work/hickory-dns/hickory-dns/Cargo.toml --target-dir /home/runner/work/hickory-dns/hickory-dns/target/llvm-cov-target --workspace --all-targets --all-features` (exit status: 101)

[lqd]

Looks like a duplicate of #135235 which should be fixed in tomorrows nightly thanks to #135261