`tests/run-make/short-ice/` fails on i686 and x86_64 Windows msvc sometimes

[jieyouxu]

• On i686-pc-windows-msvc: the assert_eq! on line 37 fails, almost seems like it missing debug info? Haven't been able to reproduce locally, but it happens on CI.
• On x86_64-pc-windows-msvc: full backtrace sometimes do not contain matching count of short backtrace marker pairs?

See discussion at #t-infra > Spurious test failure: run-make\short-ice.

[RalfJung]

Full error output for an x86_64-msvc failure:

2025-06-29T13:00:21.2815820Z ---- [run-make] tests\run-make\short-ice stdout ----
2025-06-29T13:00:21.2816150Z 
2025-06-29T13:00:21.2892068Z error: rmake recipe failed to complete
2025-06-29T13:00:21.2892502Z status: exit code: 101
2025-06-29T13:00:21.2892951Z command: "D:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\test\\run-make\\short-ice\\rmake.exe"
2025-06-29T13:00:21.2893400Z stdout: none
2025-06-29T13:00:21.2893673Z --- stderr -------------------------------
2025-06-29T13:00:21.2893890Z 
2025-06-29T13:00:21.2894145Z thread 'main' panicked at D:\a\rust\rust\tests\run-make\short-ice\rmake.rs:38:5:
2025-06-29T13:00:21.2894726Z assertion `left == right` failed: Full backtrace should contain the short backtrace markers.
2025-06-29T13:00:21.2895192Z Full backtrace:
2025-06-29T13:00:21.2895548Z error: internal compiler error[E0308]: mismatched types
2025-06-29T13:00:21.4021512Z ##[error] --> src/lib.rs:6:10
2025-06-29T13:00:21.4859363Z   |
2025-06-29T13:00:21.4859691Z 6 |     func(1);
2025-06-29T13:00:21.4860266Z   |     ---- ^ expected `&str`, found integer
2025-06-29T13:00:21.4860613Z   |     |
2025-06-29T13:00:21.4860873Z   |     arguments to this function are incorrect
2025-06-29T13:00:21.4861202Z   |
2025-06-29T13:00:21.4861678Z note: function defined here
2025-06-29T13:00:21.4861986Z  --> src/lib.rs:1:4
2025-06-29T13:00:21.4862240Z   |
2025-06-29T13:00:21.4862468Z 1 | fn func(s: &str) {
2025-06-29T13:00:21.4862757Z   |    ^^^^ -------
2025-06-29T13:00:21.4863088Z 
2025-06-29T13:00:21.4863095Z 
2025-06-29T13:00:21.4863332Z thread 'rustc' panicked at compiler\rustc_errors\src\lib.rs:1839:17:
2025-06-29T13:00:21.4863757Z aborting due to `-Z treat-err-as-bug=1`
2025-06-29T13:00:21.4864078Z stack backtrace:
2025-06-29T13:00:21.4864888Z    0:     0x7ff894b922ae - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h015df415517a6a6c
2025-06-29T13:00:21.4865562Z    1:     0x7ff894bd4789 - core::fmt::write::h82b5e227bf735b09
2025-06-29T13:00:21.4866244Z    2:     0x7ff894b867d1 - std::io::IoSlice::as_slice::hf2a00350d10a40c0
2025-06-29T13:00:21.4866729Z    3:     0x7ff894b920f5 - std::sys::backtrace::lock::hbd076de05a08e1d4
2025-06-29T13:00:21.4867380Z    4:     0x7ff894b98100 - std::panicking::default_hook::h33916e8f9241f0b7
2025-06-29T13:00:21.4867857Z    5:     0x7ff894b97e20 - std::panicking::default_hook::h33916e8f9241f0b7
2025-06-29T13:00:21.4869092Z    6:     0x7ff88b62d12e - RNvXss_NtCs8dwvfrnYlxw_5alloc5boxedINtB5_3BoxNCNvCs4pR428VrDlY_17rustc_driver_impl16install_ice_hooks_0EINtNtNtCslwDSaZFNwQA_4core3ops8function2FnTRDG0_IB1F_TRL1_INtNtCs44Tb3KzAySz_3std5panic13PanicHookInfoL0_EEEp6OutputuNtNtB1L_6marker4SyncNtB3z_4SendEL_R
2025-06-29T13:00:21.4870597Z    7:     0x7ff894b98e17 - std::panicking::rust_panic_with_hook::h60570dbbf03171bc
2025-06-29T13:00:21.4871322Z    8:     0x7ff894b98a22 - <std::panicking::begin_panic_handler::StaticStrPayload as core::panic::PanicPayload>::take_box::h89e55754fa525b96
2025-06-29T13:00:21.4872737Z    9:     0x7ff894b92c9f - std::sys::backtrace::__rust_end_short_backtrace::hfb7aee4e88135def
2025-06-29T13:00:21.4873278Z   10:     0x7ff894b985ae - __rustc[a2ab70e0d191f3e4]::rust_begin_unwind
2025-06-29T13:00:21.4873769Z   11:     0x7ff894eb8801 - core::panicking::panic_fmt::h3da96792c9261883
2025-06-29T13:00:21.4874583Z   12:     0x7ff89463b621 - <rustc_errors[de75045f364108a0]::DiagCtxtInner>::emit_diagnostic
2025-06-29T13:00:21.4875292Z   13:     0x7ff89463a2c9 - <rustc_errors[de75045f364108a0]::DiagCtxtInner>::emit_diagnostic
2025-06-29T13:00:21.4876510Z   14:     0x7ff88ba52f2d - RNvXs_NtNtNtCslwDSaZFNwQA_4core4iter8adapters6clonedINtB4_6ClonedINtNtB6_5chain5ChainIB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_IB12_INtNtNtB8_7sources5empty5EmptyRTReNtNtCshbQOAWku848_12rustc_target15target_features9StabilityRSB2U_EEINtNt
2025-06-29T13:00:21.4878551Z   15:     0x7ff8946391d8 - <rustc_errors[de75045f364108a0]::DiagCtxtInner>::emit_diagnostic
2025-06-29T13:00:21.4879276Z   16:     0x7ff8946374c1 - <rustc_errors[de75045f364108a0]::DiagCtxtHandle>::emit_diagnostic
2025-06-29T13:00:21.4880402Z   17:     0x7ff89469953c - <rustc_span[a77871936b0ee68]::ErrorGuaranteed as rustc_errors[de75045f364108a0]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
2025-06-29T13:00:21.4881234Z   18:     0x7ff89030bad1 - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_repeat_exprs
2025-06-29T13:00:21.4881857Z   19:     0x7ff890304a99 - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_repeat_exprs
2025-06-29T13:00:21.4882527Z   20:     0x7ff8902b9340 - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::try_overloaded_call_traits
2025-06-29T13:00:21.4883365Z   21:     0x7ff8903ac3e7 - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_kind
2025-06-29T13:00:21.4884099Z   22:     0x7ff8902d2dff - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_coercible_to_type
2025-06-29T13:00:21.4884776Z   23:     0x7ff8903a0bae - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_with_expectation
2025-06-29T13:00:21.4885429Z   24:     0x7ff89031301a - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_repeat_exprs
2025-06-29T13:00:21.4886026Z   25:     0x7ff8903a2703 - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_kind
2025-06-29T13:00:21.4886641Z   26:     0x7ff8902d2dff - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_coercible_to_type
2025-06-29T13:00:21.4887316Z   27:     0x7ff8903a0bae - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_expr_with_expectation
2025-06-29T13:00:21.4888016Z   28:     0x7ff8902d4e8f - <rustc_hir_typeck[6d20e2178e31fbb5]::fn_ctxt::FnCtxt>::check_return_or_body_tail
2025-06-29T13:00:21.4888884Z   29:     0x7ff8902111c1 - rustc_hir_typeck[6d20e2178e31fbb5]::check::check_fn
2025-06-29T13:00:21.4889512Z   30:     0x7ff890178312 - rustc_hir_typeck[6d20e2178e31fbb5]::upvar::should_do_rust_2021_incompatible_closure_captures_analysis
2025-06-29T13:00:21.4890705Z   31:     0x7ff892c39fc5 - rustc_query_impl[f65035c5825fc76]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f65035c5825fc76]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1160841ca6b9c3b]::query::erase::Erased<[u8; 8usize]>>
2025-06-29T13:00:21.4892095Z   32:     0x7ff892b7d647 - rustc_query_impl[f65035c5825fc76]::query_impl::anon_const_kind::get_query_incr::__rust_end_short_backtrace
2025-06-29T13:00:21.4893677Z   33:     0x7ff892a34ecb - RINvNtNtCskObJlfHqc7P_18rustc_query_system5query8plumbing17try_execute_queryINtCs1jWAAkO1Hhi_16rustc_query_impl13DynamicConfigINtNtCs6GXz0QJQbux_21rustc_data_structures9vec_cache8VecCacheNtNtCsTIkO8HJayW_10rustc_span6def_id10LocalDefIdINtNtNtCs5MqvJpnLTP_1
2025-06-29T13:00:21.4895117Z   34:     0x7ff892c6b28d - rustc_query_impl[f65035c5825fc76]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
2025-06-29T13:00:21.4896206Z   35:     0x7ff8908f3a69 - <u8 as <[_]>::to_vec_in::ConvertVec>::to_vec::<alloc[5fb8c00af2c371e4]::alloc::Global>
2025-06-29T13:00:21.4897513Z   36:     0x7ff8908e1665 - RINvNtNtCs6GXz0QJQbux_21rustc_data_structures4sync8parallel15par_for_each_inRNtNtCsTIkO8HJayW_10rustc_span6def_id10LocalDefIdRSB1d_NCINvMs1_NtNtCs5MqvJpnLTP_12rustc_middle3hir3mapNtNtNtB2i_2ty7context6TyCtxt19par_hir_body_ownersNCNvCsgZS5r16GcAv_18rustc_hi
2025-06-29T13:00:21.4899002Z   37:     0x7ff8906933f8 - rustc_hir_analysis[c5fc4c539d80be39]::check_crate
2025-06-29T13:00:21.4899594Z   38:     0x7ff88b9bea09 - rustc_interface[2a576fd17531f309]::passes::analysis
2025-06-29T13:00:21.4900637Z   39:     0x7ff892c3a5d3 - rustc_query_impl[f65035c5825fc76]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f65035c5825fc76]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1160841ca6b9c3b]::query::erase::Erased<[u8; 0usize]>>
2025-06-29T13:00:21.4902175Z   40:     0x7ff892b7e4e4 - rustc_query_impl[f65035c5825fc76]::query_impl::anon_const_kind::get_query_incr::__rust_end_short_backtrace
2025-06-29T13:00:21.4903845Z   41:     0x7ff89297c8f4 - RINvNtNtCskObJlfHqc7P_18rustc_query_system5query8plumbing17try_execute_queryINtCs1jWAAkO1Hhi_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCs5MqvJpnLTP_12rustc_middle5query5erase6ErasedAhj0_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
2025-06-29T13:00:21.4905244Z   42:     0x7ff8928ae24e - rustc_query_impl[f65035c5825fc76]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
2025-06-29T13:00:21.4906650Z   43:     0x7ff88b674290 - RINvMs2_NtNtCs44Tb3KzAySz_3std6thread5localINtB6_8LocalKeyINtNtCslwDSaZFNwQA_4core4cell4CellPuEE4withNCINvNtNtNtCs5MqvJpnLTP_12rustc_middle2ty7context3tls13enter_contextNCINvMsj_B1I_NtB1I_10GlobalCtxt5enterNCNCINvNtCs3DnKxWTplJB_15rustc_interface6passes28c
2025-06-29T13:00:21.4908712Z   44:     0x7ff88b6f2dda - RINvMsn_NtNtCs5MqvJpnLTP_12rustc_middle2ty7contextNtB6_6TyCtxt18create_global_ctxtINtNtCslwDSaZFNwQA_4core6option6OptionNtNtCs3DnKxWTplJB_15rustc_interface7queries6LinkerENCNCINvNtB1Y_6passes28create_and_enter_global_ctxtB1i_NCNCNvCs4pR428VrDlY_17rustc_dri
2025-06-29T13:00:21.4910687Z   45:     0x7ff88b73ce5f - RINvNtNtNtNtCslwDSaZFNwQA_4core5slice4sort6stable5drift4sortTReINtNtCs8dwvfrnYlxw_5alloc3vec3VecNtCs3zk6zBQNtCM_15rustc_lint_defs6LintIdEENCINvMNtB14_5sliceSBW_11sort_by_keyBX_NCNvNvCs4pR428VrDlY_17rustc_driver_impl14describe_lints16sort_lint_groupss_0E0EB
2025-06-29T13:00:21.4912899Z   46:     0x7ff88b62cda7 - RNvXsq_NtCs8dwvfrnYlxw_5alloc5boxedINtB5_3BoxDG_INtNtNtCslwDSaZFNwQA_4core3ops8function6FnOnceTRL0_NtNtCs4K0Vwkch9wV_13rustc_session7session7SessionNtNtNtCs5MqvJpnLTP_12rustc_middle2ty7context10CurrentGcxINtNtB7_4sync3ArcNtNtCs6GXz0QJQbux_21rustc_data_stru
2025-06-29T13:00:21.4915022Z   47:     0x7ff88b7234fc - rustc_interface[2a576fd17531f309]::passes::create_and_enter_global_ctxt::<core[fabb8409faebf826]::option::Option<rustc_interface[2a576fd17531f309]::queries::Linker>, rustc_driver_impl[3372a8a2eb278b28]::run_compiler::{closure#0}::{closure#2}>
2025-06-29T13:00:21.4917018Z   48:     0x7ff88b6cb40e - RINvMs_CsdE6PBnUE6RH_10scoped_tlsINtB5_9ScopedKeyNtCsTIkO8HJayW_10rustc_span14SessionGlobalsE3setNCNCNCINvNtCs3DnKxWTplJB_15rustc_interface4util26run_in_thread_with_globalsNCINvB1G_31run_in_thread_pool_with_globalsNCINvNtB1I_9interface12run_compileruNCNvCs
2025-06-29T13:00:21.4919306Z   49:     0x7ff88b6ea9db - RINvNtNtCs44Tb3KzAySz_3std3sys9backtrace28___rust_begin_short_backtraceNCNCINvNtCs3DnKxWTplJB_15rustc_interface4util26run_in_thread_with_globalsNCINvB1e_31run_in_thread_pool_with_globalsNCINvNtB1g_9interface12run_compileruNCNvCs4pR428VrDlY_17rustc_driver_i
2025-06-29T13:00:21.4920979Z   50:     0x7ff88b6ebdea - <std[2f8256383ce76d51]::path::PathBuf as core[fabb8409faebf826]::hash::Hash>::hash::<rustc_stable_hash[dd237e182b666481]::stable_hasher::StableHasher<rustc_stable_hash[dd237e182b666481]::sip128::SipHasher128>>
2025-06-29T13:00:21.4922364Z   51:     0x7ff894b9e5c8 - std::sys::pal::windows::thread::Thread::new::h3b48a11d56a87b71
2025-06-29T13:00:21.4922824Z   52:     0x7ff8e5c0e8d7 - BaseThreadInitThunk
2025-06-29T13:00:21.4923412Z   53:     0x7ff8e6b7c34c - RtlUserThreadStart
2025-06-29T13:00:21.4923666Z 
2025-06-29T13:00:21.4924064Z error: the compiler unexpectedly panicked. this is a bug.
2025-06-29T13:00:21.4924349Z 
2025-06-29T13:00:21.4925035Z 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
2025-06-29T13:00:21.4925697Z 
2025-06-29T13:00:21.4925896Z note: please make sure that you have updated to the latest nightly
2025-06-29T13:00:21.4926407Z 
2025-06-29T13:00:21.4926912Z note: please attach the file at `D:\a\rust\rust\build\x86_64-pc-windows-msvc\test\run-make\short-ice\rmake_out\rustc-ice-2025-06-29T12_59_53-5036.txt` to your bug report
2025-06-29T13:00:21.4927455Z 
2025-06-29T13:00:21.4927625Z note: compiler flags: -Z treat-err-as-bug=1
2025-06-29T13:00:21.4927907Z 
2025-06-29T13:00:21.4928054Z query stack during panic:
2025-06-29T13:00:21.4928363Z #0 [typeck] type-checking `main`
2025-06-29T13:00:21.4928968Z #1 [analysis] running analysis passes on this crate
2025-06-29T13:00:21.4929310Z end of query stack
2025-06-29T13:00:21.4929481Z 
2025-06-29T13:00:21.4929570Z   left: 3
2025-06-29T13:00:21.4929785Z  right: 5
2025-06-29T13:00:21.4930135Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2025-06-29T13:00:21.4930563Z ------------------------------------------