rust-lang / rust-lang/rust

`Found unstable fingerprints for evaluate_obligation(c06a881ba4fc8a41-cdd7b5daf5a2edb3): Ok(EvaluatedToOkModuloRegions)`

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A-incr-comp C-bug I-ICE S-needs-repro T-compiler
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Rust
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Description

Code

Nope:

$ cloc --exclude-dir target .
     417 text files.
     392 unique files.                                          
      26 files ignored.

github.com/AlDanial/cloc v 2.02  T=0.09 s (4166.4 files/s, 466397.5 lines/s)
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
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Rust                           322           3545           1885          31910
YAML                            17             86            150           1527
JSON                             4              0              0           1325
CSV                              2              0              0           1006
TOML                            22             54             12            583
SQL                              2             10              0            401
Bourne Shell                     5             56             49            400
XML                              4              0              0            297
PHP                              1              7              2            281
JavaScript                       1             18              3             90
Text                             1              7              0             89
Dockerfile                       6             24              0             34
Markdown                         2              6              0             13
C/C++ Header                     3              0              0             12
-------------------------------------------------------------------------------
SUM:                           392           3813           2101          37968
-------------------------------------------------------------------------------
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rustc --version --verbose:

rustc 1.79.0 (129f3b996 2024-06-10)
binary: rustc
commit-hash: 129f3b9964af4d4a709d1383930ade12dfe7c081
commit-date: 2024-06-10
host: x86_64-unknown-linux-gnu
release: 1.79.0
LLVM version: 18.1.7
Error output
error: internal compiler error: encountered incremental compilation error with evaluate_obligation(c06a881ba4fc8a41-cdd7b5daf5a2edb3)
  |
  = help: This is a known issue with the compiler. Run `cargo clean -p public_api` or `cargo clean` to allow your project to compile
  = note: Please follow the instructions below to create a bug report with the provided information
  = note: See <https://github.com/rust-lang/rust/issues/84970> for more information
Backtrace 

thread 'rustc' panicked at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/compiler/rustc_query_system/src/query/plumbing.rs:725:9:
Found unstable fingerprints for evaluate_obligation(c06a881ba4fc8a41-cdd7b5daf5a2edb3): Ok(EvaluatedToOkModuloRegions)
stack backtrace:
   0:     0x7f7eaa38c035 - std::backtrace_rs::backtrace::libunwind::trace::h1a07e5dba0da0cd2
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x7f7eaa38c035 - std::backtrace_rs::backtrace::trace_unsynchronized::h61b9b8394328c0bc
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f7eaa38c035 - std::sys_common::backtrace::_print_fmt::h1c5e18b460934cff
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f7eaa38c035 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e1a1972118942ad
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f7eaa3db29b - core::fmt::rt::Argument::fmt::h07af2b4071d536cd
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/fmt/rt.rs:165:63
   5:     0x7f7eaa3db29b - core::fmt::write::hc090a2ffd6b28c4a
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/fmt/mod.rs:1157:21
   6:     0x7f7eaa380bdf - std::io::Write::write_fmt::h8898bac6ff039a23
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/io/mod.rs:1832:15
   7:     0x7f7eaa38be0e - std::sys_common::backtrace::_print::h4e80c5803d4ee35b
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f7eaa38be0e - std::sys_common::backtrace::print::ha96650907276675e
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f7eaa38e779 - std::panicking::default_hook::{{closure}}::h215c2a0a8346e0e0
  10:     0x7f7eaa38e4bd - std::panicking::default_hook::h207342be97478370
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/panicking.rs:298:9
  11:     0x7f7ead2891b7 - std[3c8ba8ebcf555201]::panicking::update_hook::<alloc[bfbae7e348dce413]::boxed::Box<rustc_driver_impl[c88438ade88661f4]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f7eaa38ee76 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha9c3bc81d312fd83
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/alloc/src/boxed.rs:2036:9
  13:     0x7f7eaa38ee76 - std::panicking::rust_panic_with_hook::hac8bdceee1e4fe2c
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/panicking.rs:799:13
  14:     0x7f7eaa38ec24 - std::panicking::begin_panic_handler::{{closure}}::h00d785e82757ce3c
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/panicking.rs:664:13
  15:     0x7f7eaa38c4f9 - std::sys_common::backtrace::__rust_end_short_backtrace::h1628d957bcd06996
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7f7eaa38e957 - rust_begin_unwind
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/panicking.rs:652:5
  17:     0x7f7eaa3d7763 - core::panicking::panic_fmt::hdc63834ffaaefae5
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/panicking.rs:72:14
  18:     0x7f7eada067a6 - rustc_query_system[4e189ce2c77124d]::query::plumbing::incremental_verify_ich_failed::<rustc_middle[3ff731b746e7b038]::ty::context::TyCtxt>
  19:     0x7f7eaeb53e58 - rustc_query_system[4e189ce2c77124d]::query::plumbing::try_execute_query::<rustc_query_impl[a12402620de91e8]::DynamicConfig<rustc_query_system[4e189ce2c77124d]::query::caches::DefaultCache<rustc_type_ir[a145be3c51398263]::canonical::Canonical<rustc_middle[3ff731b746e7b038]::ty::context::TyCtxt, rustc_middle[3ff731b746e7b038]::ty::ParamEnvAnd<rustc_middle[3ff731b746e7b038]::ty::predicate::Predicate>>, rustc_middle[3ff731b746e7b038]::query::erase::Erased<[u8; 2usize]>>, false, false, false>, rustc_query_impl[a12402620de91e8]::plumbing::QueryCtxt, true>
  20:     0x7f7eaeb525e0 - rustc_query_impl[a12402620de91e8]::query_impl::evaluate_obligation::get_query_incr::__rust_end_short_backtrace
  21:     0x7f7eab37b644 - <rustc_trait_selection[173dcaf5d960508e]::traits::fulfill::FulfillProcessor as rustc_data_structures[52ff41d7b92c45f3]::obligation_forest::ObligationProcessor>::process_obligation
  22:     0x7f7eae60ea00 - <rustc_data_structures[52ff41d7b92c45f3]::obligation_forest::ObligationForest<rustc_trait_selection[173dcaf5d960508e]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[173dcaf5d960508e]::traits::fulfill::FulfillProcessor>
  23:     0x7f7eabba0913 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::confirm_builtin_call
  24:     0x7f7eaf0ba130 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  25:     0x7f7eab4a40e2 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_method_argument_types
  26:     0x7f7eaf0bc1d5 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  27:     0x7f7eaf0ba6a4 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  28:     0x7f7eaf0b4bc6 - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_block_with_expected
  29:     0x7f7eaf0ba64d - <rustc_hir_typeck[e95414a4bbf7473d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  30:     0x7f7eaeaddc8c - rustc_hir_typeck[e95414a4bbf7473d]::check::check_fn
  31:     0x7f7eaead2baf - rustc_hir_typeck[e95414a4bbf7473d]::typeck
  32:     0x7f7eaead188d - rustc_query_impl[a12402620de91e8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a12402620de91e8]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3ff731b746e7b038]::query::erase::Erased<[u8; 8usize]>>
  33:     0x7f7eae7182b8 - rustc_query_system[4e189ce2c77124d]::query::plumbing::try_execute_query::<rustc_query_impl[a12402620de91e8]::DynamicConfig<rustc_query_system[4e189ce2c77124d]::query::caches::VecCache<rustc_span[8c7415e9d33ddd75]::def_id::LocalDefId, rustc_middle[3ff731b746e7b038]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a12402620de91e8]::plumbing::QueryCtxt, true>
  34:     0x7f7eae99308c - rustc_query_impl[a12402620de91e8]::query_impl::typeck::get_query_incr::__rust_end_short_backtrace
  35:     0x7f7eaedca9b5 - rustc_hir_analysis[46a17d8846b4335f]::check_crate
  36:     0x7f7eaef890e0 - rustc_interface[640972162e3c086f]::passes::analysis
  37:     0x7f7eaef88aef - rustc_query_impl[a12402620de91e8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a12402620de91e8]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3ff731b746e7b038]::query::erase::Erased<[u8; 1usize]>>
  38:     0x7f7eaf471e53 - rustc_query_system[4e189ce2c77124d]::query::plumbing::try_execute_query::<rustc_query_impl[a12402620de91e8]::DynamicConfig<rustc_query_system[4e189ce2c77124d]::query::caches::SingleCache<rustc_middle[3ff731b746e7b038]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a12402620de91e8]::plumbing::QueryCtxt, true>
  39:     0x7f7eaf471a9c - rustc_query_impl[a12402620de91e8]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  40:     0x7f7eaf183149 - rustc_interface[640972162e3c086f]::interface::run_compiler::<core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>, rustc_driver_impl[c88438ade88661f4]::run_compiler::{closure#0}>::{closure#1}
  41:     0x7f7eaf140f8b - std[3c8ba8ebcf555201]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[640972162e3c086f]::util::run_in_thread_with_globals<rustc_interface[640972162e3c086f]::interface::run_compiler<core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>, rustc_driver_impl[c88438ade88661f4]::run_compiler::{closure#0}>::{closure#1}, core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>>
  42:     0x7f7eaf140d80 - <<std[3c8ba8ebcf555201]::thread::Builder>::spawn_unchecked_<rustc_interface[640972162e3c086f]::util::run_in_thread_with_globals<rustc_interface[640972162e3c086f]::interface::run_compiler<core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>, rustc_driver_impl[c88438ade88661f4]::run_compiler::{closure#0}>::{closure#1}, core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[868bc93c3f2beb33]::result::Result<(), rustc_span[8c7415e9d33ddd75]::ErrorGuaranteed>>::{closure#2} as core[868bc93c3f2beb33]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  43:     0x7f7eaa398cab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h09e5a4c541afa800
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/alloc/src/boxed.rs:2022:9
  44:     0x7f7eaa398cab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9c8b03c22f4e7026
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/alloc/src/boxed.rs:2022:9
  45:     0x7f7eaa398cab - std::sys::pal::unix::thread::Thread::new::thread_start::h522bc89a54da820a
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/std/src/sys/pal/unix/thread.rs:108:17
  46:     0x7f7eaa177962 - start_thread
                               at ./nptl/pthread_create.c:447:8
  47:     0x7f7eaa1f2b08 - __GI___clone3
                               at /builddir/glibc-2.39/misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
  48:                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: rustc 1.79.0 (129f3b996 2024-06-10) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C linker=/usr/bin/clang -C incremental=[REDACTED] -C link-arg=-fuse-ld=lld -C link-arg=-Wl,-z,nostart-stop-gc

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

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `core::result::Result<core::convert::Infallible, rpcy::error::RpcError<rpcy_proto_jsonrpc::JSON_RPC_2_0, rpcy::transport::tokio::pooled::PooledTransport<rpcy_proto_jsonrpc::JSON_RPC_2_0, connect_core::rpc::Transport>, rpcy_proto_jsonrpc::ErrorResponseObject>>: core::marker::Send`
#1 [typeck] type-checking `route::activity::routes`
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `public-api` (bin "public-api") due to 1 previous error

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the incremental-compilation failure with rustc 1.79.0 and the reported evaluate_obligation fingerprint; the panic is in compiler/rustc_query_system/src/query/plumbing.rs:725, with the trace passing through rustc_trait_selection and rustc_hir_typeck. Minimize the unavailable project input before investigating a regression test, with completion shown by compilation no longer producing the internal compiler error without requiring cargo clean.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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