rustc 1.85.1 fails to compile jiff on x86_64-pc-windows-msvc

[allan2]

On my Windows machine, rustc is failing to build jiff (any version, 0.1 or 0.2) on stable (1.8.5.1). It builds fine on beta (1.86.0-beta.6 8c7969a 2025-03-16) and nightly (1.87.0-nightly 78948ac 2025-03-20).

Code

src/main.rs

fn main() {
    println!("Hello, world!");
}

Cargo.toml

[package]
name = "jiff-compile-bug"
version = "0.0.0"
edition = "2024"
publish = false

[dependencies]
jiff = "0.2.4"

rustc --version --verbose:

rustc 1.85.1 (4eb161250 2025-03-15)
binary: rustc
commit-hash: 4eb161250e340c8f48f66e2b929ef4a5bed7c181
commit-date: 2025-03-15
host: x86_64-pc-windows-msvc
release: 1.85.1
LLVM version: 19.1.7

Error output

RUST_BACKTRACE=1 cargo build

   Compiling  v0.2.4

thread 'rustc' panicked at compiler\rustc_metadata\src\rmeta\decoder.rs:1701:22:
missing source file
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\std\src\panicking.rs:692
   1: core::panicking::panic_fmt
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\core\src\panicking.rs:75
   2: core::panicking::panic_display
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\core\src\panicking.rs:261
   3: core::option::expect_failed
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\core\src\option.rs:2024
   4: <rustc_metadata::rmeta::decoder::DecodeContext as rustc_span::SpanDecoder>::decode_span
   5: RINvMs6_NtCsag7cZLPZgMG_9hashbrown3rawINtB6_8RawTableTNtNtCs4TvN3zakyDo_10rustc_span6def_id8DefIndexNtNtCsh5y175izj6V_9rustc_hir11definitions6DefKeyEE14reserve_rehashNCINvNtB8_3map11make_hasherBQ_B1A_NtCsbFfs2EFLlfU_10rustc_hash13FxBuildHasherE0ECs24hlJGjY
   6: RINvMs6_NtCsag7cZLPZgMG_9hashbrown3rawINtB6_8RawTableTNtNtCs4TvN3zakyDo_10rustc_span6def_id8DefIndexNtNtCsh5y175izj6V_9rustc_hir11definitions6DefKeyEE14reserve_rehashNCINvNtB8_3map11make_hasherBQ_B1A_NtCsbFfs2EFLlfU_10rustc_hash13FxBuildHasherE0ECs24hlJGjY
   7: rustc_metadata::fs::encode_and_write_metadata
   8: rustc_query_impl::plumbing::query_key_hash_verify_all
   9: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCsdJ7Jdt3AtsE_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
  10: rustc_query_impl::plumbing::query_key_hash_verify_all
  11: <rustc_middle::ty::context::TyCtxt>::instance_mir
  12: rustc_monomorphize::mono_checks::check_mono_item
  13: rustc_query_impl::plumbing::query_key_hash_verify_all
  14: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheNtNtNtCsdJ7Jdt3AtsE_12rustc_middle2ty8instance8InstanceINtNtNtB2z_5query5erase6ErasedAhj0_EEKb0_KB3Y_
  15: rustc_query_impl::plumbing::query_key_hash_verify_all
  16: rustc_monomorphize::collector::items_of_instance
  17: rustc_query_impl::plumbing::query_key_hash_verify_all
  18: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheTNtNtNtCsdJ7Jdt3AtsE_12rustc_middle2ty8instance8InstanceNtNtNtB2A_3mir4mono14CollectionModeEINtNtNtB2
  19: rustc_query_impl::plumbing::query_key_hash_verify_all
  20: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  21: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  22: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  23: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  24: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  25: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  26: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  27: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCsdJ7Jdt3AtsE_12rustc_middle5query5erase6ErasedAhj18_EEKb0_KB3t_KB3t_ENtNtB1f_8plumbing9QueryCt
  28: rustc_query_impl::query_system
  29: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
  30: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  31: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  32: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtCs837yaQvHFj4_21rustc_data_structures9vec_cache8VecCacheNtNtCs4TvN3zakyDo_10rustc_span6def_id8CrateNumINtNtNtCsdJ7Jdt3AtsE_12
  33: rustc_query_impl::query_system
  34: <rustc_metadata::rmeta::encoder::EncodeContext as rustc_span::SpanEncoder>::encode_symbol
  35: rustc_metadata::rmeta::encoder::encode_metadata
  36: rustc_metadata::fs::encode_and_write_metadata
  37: <rustc_interface::queries::Linker>::codegen_and_build_linker
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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 1.85.1 (4eb161250 2025-03-15) running on x86_64-pc-windows-msvc

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

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

query stack during panic:
#0 [optimized_mir] optimizing MIR for `std::sys::sync::rwlock::futex::RwLock::read`
#1 [check_mono_item] monomorphization-time checking
#2 [items_of_instance] collecting items used by `std::sys::sync::rwlock::futex::RwLock::read`
#3 [collect_and_partition_mono_items] collect_and_partition_mono_items
#4 [exported_symbols] collecting exported symbols for crate `0`
end of query stack

thread 'rustc' panicked at compiler\rustc_metadata\src\rmeta\decoder.rs:477:36:
Missing SyntaxContext 58 for crate "std"
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\std\src\panicking.rs:692
   1: core::panicking::panic_fmt
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library\core\src\panicking.rs:75
   2: <rustc_metadata::rmeta::decoder::DecodeContext as rustc_span::SpanDecoder>::decode_syntax_context
   3: <rustc_metadata::rmeta::decoder::DecodeContext as rustc_span::SpanDecoder>::decode_span
   4: RINvMs6_NtCsag7cZLPZgMG_9hashbrown3rawINtB6_8RawTableTNtNtCs4TvN3zakyDo_10rustc_span6def_id8DefIndexNtNtCsh5y175izj6V_9rustc_hir11definitions6DefKeyEE14reserve_rehashNCINvNtB8_3map11make_hasherBQ_B1A_NtCsbFfs2EFLlfU_10rustc_hash13FxBuildHasherE0ECs24hlJGjY
   5: RINvMs6_NtCsag7cZLPZgMG_9hashbrown3rawINtB6_8RawTableTNtNtCs4TvN3zakyDo_10rustc_span6def_id8DefIndexNtNtCsh5y175izj6V_9rustc_hir11definitions6DefKeyEE14reserve_rehashNCINvNtB8_3map11make_hasherBQ_B1A_NtCsbFfs2EFLlfU_10rustc_hash13FxBuildHasherE0ECs24hlJGjY
   6: rustc_metadata::fs::encode_and_write_metadata
   7: rustc_query_impl::plumbing::query_key_hash_verify_all
   8: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCsdJ7Jdt3AtsE_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
   9: rustc_query_impl::plumbing::query_key_hash_verify_all
  10: <rustc_middle::ty::context::TyCtxt>::instance_mir
  11: rustc_monomorphize::mono_checks::check_mono_item
  12: rustc_query_impl::plumbing::query_key_hash_verify_all
  13: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheNtNtNtCsdJ7Jdt3AtsE_12rustc_middle2ty8instance8InstanceINtNtNtB2z_5query5erase6ErasedAhj0_EEKb0_KB3Y_
  14: rustc_query_impl::plumbing::query_key_hash_verify_all
  15: rustc_monomorphize::collector::items_of_instance
  16: rustc_query_impl::plumbing::query_key_hash_verify_all
  17: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheTNtNtNtCsdJ7Jdt3AtsE_12rustc_middle2ty8instance8InstanceNtNtNtB2A_3mir4mono14CollectionModeEINtNtNtB2
  18: rustc_query_impl::plumbing::query_key_hash_verify_all
  19: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  20: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  21: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  22: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  23: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  24: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  25: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  26: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  27: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  28: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCsdJ7Jdt3AtsE_12rustc_middle5query5erase6ErasedAhj18_EEKb0_KB3t_KB3t_ENtNtB1f_8plumbing9QueryCt
  29: rustc_query_impl::query_system
  30: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
  31: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  32: <alloc::sync::Arc<rustc_session::config::OutputFilenames>>::drop_slow
  33: RINvNtNtCshEccyZ4IOWV_18rustc_query_system5query8plumbing17try_execute_queryINtCs5WUFc8ekKxI_16rustc_query_impl13DynamicConfigINtNtCs837yaQvHFj4_21rustc_data_structures9vec_cache8VecCacheNtNtCs4TvN3zakyDo_10rustc_span6def_id8CrateNumINtNtNtCsdJ7Jdt3AtsE_12
  34: rustc_query_impl::query_system
  35: <rustc_metadata::rmeta::encoder::EncodeContext as rustc_span::SpanEncoder>::encode_symbol
  36: rustc_metadata::rmeta::encoder::encode_metadata
  37: rustc_metadata::fs::encode_and_write_metadata
  38: <rustc_interface::queries::Linker>::codegen_and_build_linker
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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 1.85.1 (4eb161250 2025-03-15) running on x86_64-pc-windows-msvc

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

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

query stack during panic:
#0 [optimized_mir] optimizing MIR for `std::sync::poison::rwlock::RwLock::<T>::write`
#1 [check_mono_item] monomorphization-time checking
#2 [items_of_instance] collecting items used by `std::sync::poison::rwlock::RwLock::<tz::db::bundled::inner::global::CachedZones>::write`
#3 [collect_and_partition_mono_items] collect_and_partition_mono_items
#4 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
error: could not compile `` (lib)

Caused by:
  process didn't exit successfully: `C:\Users\Al\.rustup\toolchains\stable-x86_64-pc-windows-msvc\bin\rustc.exe --crate-name  --edition=2021 C:\Users\Al\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\jiff-0.2.4\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=178 --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg "feature=\"alloc\"" --cfg "feature=\"default\"" --cfg "feature=\"std\"" --cfg "feature=\"tz-fat\"" --cfg "feature=\"tz-system\"" --cfg "feature=\"tzdb-bundle-platform\"" --cfg "feature=\"tzdb-concatenated\"" --cfg "feature=\"tzdb-zoneinfo\"" --check-cfg cfg(docsrs,test) --check-cfg "cfg(feature, values(\"alloc\", \"default\", \"js\", \"logging\", \"serde\", \"static\", \"static-tz\", \"std\", \"tz-fat\", \"tz-system\", \"tzdb-bundle-always\", \"tzdb-bundle-platform\", \"tzdb-concatenated\", \"tzdb-zoneinfo\"))" -C metadata=a8d2e81290119069 -C extra-filename=-264f2e77efbdd8e1 --out-dir \jiff-compile-bug\target\debug\deps -L dependency=C:\Users\Al\jiff-compile-bug\target\debug\deps --extern jiff_tzdb_platform=C:\Users\Al\jiff-compile-bug\target\debug\deps\libjiff_tzdb_platform-395ee3f4fe696184.rmeta --extern windows_sys=C:\Users\Al\jiff-compile-bug\target\debug\deps\libwindows_sys-8042586e44b05abd.rmeta --cap-lints allow -L native=C:\Users\Al\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\windows_x86_64_msvc-0.52.6\lib` (exit code: 101)

[RossSmyth]

I am unable to replicate this on my machine. Same setup.

rustc 1.85.1 (4eb161250 2025-03-15)
binary: rustc
commit-hash: 4eb161250e340c8f48f66e2b929ef4a5bed7c181
commit-date: 2025-03-15
host: x86_64-pc-windows-msvc
release: 1.85.1
LLVM version: 19.1.7

(also unable to replicate it on Linux for reference)

[moxian]

I can't reproduce either (win 10 64 bit)

Does it fail compilation after cargo clean as well?
Does it fail to compile with 1.84.1? What about a reasonably old nightly? (say, nightly-2025-01-07 which would use mostly the same code as 1.851 stable)

If you can find a failing nightly, can you please run cargo-bisect-rustc to identify when did things get fixed? (or, alternatively, when did they first get broken)

If not, can you reproduce it after uninstalling and reinstalling 1.85.1? (perhaps you have a corrupted install?)

@rustbot label: +S-needs-repro -needs-triage

[allan2]

It is working now on stable.

It was working before on stable until Friday afternoon, when I encountered the error above. Strange.