[INFO] fetching crate serialization 0.2.12... [INFO] building serialization-0.2.12 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] extracting crate serialization 0.2.12 into /workspace/builds/worker-1-tc2/source [INFO] started tweaking crates.io crate serialization 0.2.12 [INFO] removed 0 missing tests [INFO] finished tweaking crates.io crate serialization 0.2.12 [INFO] tweaked toml for crates.io crate serialization 0.2.12 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate serialization 0.2.12 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate serialization 0.2.12 already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 917abfd4cfcf24a9eeb17c4176cbb4c6f13b7b323747b77f7c3e4cd5962011dc [INFO] running `Command { std: "docker" "start" "-a" "917abfd4cfcf24a9eeb17c4176cbb4c6f13b7b323747b77f7c3e4cd5962011dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "917abfd4cfcf24a9eeb17c4176cbb4c6f13b7b323747b77f7c3e4cd5962011dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "917abfd4cfcf24a9eeb17c4176cbb4c6f13b7b323747b77f7c3e4cd5962011dc", kill_on_drop: false }` [INFO] [stdout] 917abfd4cfcf24a9eeb17c4176cbb4c6f13b7b323747b77f7c3e4cd5962011dc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 8584d04d3e9f2e3cfa4e6d83e1879408982525de8e0ab2b8f4dc7cdb9a570df3 [INFO] running `Command { std: "docker" "start" "-a" "8584d04d3e9f2e3cfa4e6d83e1879408982525de8e0ab2b8f4dc7cdb9a570df3", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.92 [INFO] [stderr] Compiling unicode-ident v1.0.14 [INFO] [stderr] Compiling serde v1.0.216 [INFO] [stderr] Compiling uuid v1.11.0 [INFO] [stderr] Compiling simdutf8 v0.1.5 [INFO] [stderr] Compiling constvec v0.1.14 [INFO] [stderr] Compiling fastbuf v0.28.0 [INFO] [stderr] Compiling seq-macro v0.3.5 [INFO] [stdout] error[E0658]: use of unstable const library feature `const_ops` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/constvec-0.1.14/src/lib.rs:232:63 [INFO] [stdout] | [INFO] [stdout] 232 | impl const Add<&ConstVec<[T; N2]>> [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ trait is not stable as const yet [INFO] [stdout] | [INFO] [stdout] = note: see issue #143802 for more information [INFO] [stdout] = help: add `#![feature(const_ops)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-09-05; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: internal compiler error: compiler/rustc_const_eval/src/check_consts/qualifs.rs:359:13: expected ConstKind::Param or ConstKind::Value here, found UnevaluatedConst { def: DefId(0:111 ~ constvec[b4f3]::{impl#8}::add::{constant#2}), args: ['{erased}, '{erased}, T/#2, N1/#3, N2/#4] } [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] [INFO] [stderr] thread 'rustc' (93) panicked at compiler/rustc_const_eval/src/check_consts/qualifs.rs:359:13: [INFO] [stderr] Box [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7e4616e785a2 - ::fmt::h71e2dbb21440d8d7 [INFO] [stderr] 1: 0x7e461760c8fc - core::fmt::write::ha34f2b5c70e30f63 [INFO] [stderr] 2: 0x7e4616e2ca41 - std::io::Write::write_fmt::h76264e5b71fd6d13 [INFO] [stderr] 3: 0x7e4616e3dfb2 - std::sys::backtrace::BacktraceLock::print::hb3aae3980c2c9bd5 [INFO] [stderr] 4: 0x7e4616e441c7 - std::panicking::default_hook::{{closure}}::h1b7baa88a148d351 [INFO] [stderr] 5: 0x7e4616e43cd3 - std::panicking::default_hook::hbc5e86c06039547d [INFO] [stderr] 6: 0x7e4615ef78c1 - std[12c422ba0e8f2ccd]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 7: 0x7e4616e446cf - std::panicking::panic_with_hook::ha6d2c09d64f936dd [INFO] [stderr] 8: 0x7e4615f34eb1 - std[12c422ba0e8f2ccd]::panicking::begin_panic::::{closure#0} [INFO] [stderr] 9: 0x7e4615f28796 - std[12c422ba0e8f2ccd]::sys::backtrace::__rust_end_short_backtrace::::{closure#0}, !> [INFO] [stderr] 10: 0x7e4615f260f9 - std[12c422ba0e8f2ccd]::panicking::begin_panic:: [INFO] [stderr] 11: 0x7e4615f40a61 - ::emit_producing_guarantee [INFO] [stderr] 12: 0x7e46164a057a - rustc_middle[4f528906bdeedf54]::util::bug::opt_span_bug_fmt::::{closure#0} [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] 13: 0x7e46164a074a - rustc_middle[4f528906bdeedf54]::ty::context::tls::with_opt::::{closure#0}, !>::{closure#0} [INFO] [stderr] 14: 0x7e461648ea8b - rustc_middle[4f528906bdeedf54]::ty::context::tls::with_context_opt::::{closure#0}, !>::{closure#0}, !> [INFO] [stderr] 15: 0x7e46142461f0 - rustc_middle[4f528906bdeedf54]::util::bug::bug_fmt [INFO] [stderr] 16: 0x7e461942ab39 - rustc_const_eval[bf9dc07de88681c0]::check_consts::qualifs::in_operand:: as rustc_middle[4f528906bdeedf54]::mir::visit::Visitor>::visit_assign::{closure#0}>.cold [INFO] [stderr] 17: 0x7e46183e27a4 - as rustc_mir_dataflow[530acf239d064b98]::framework::Analysis>::apply_primary_statement_effect [INFO] [stderr] 18: 0x7e46183dc7a5 - ::has_mut_interior [INFO] [stderr] 19: 0x7e46183dbc45 - rustc_mir_transform[f52da0ade38d85eb]::mir_const_qualif [INFO] [stderr] 20: 0x7e46183db9e5 - rustc_query_impl[2353b90057dd5f84]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 21: 0x7e46183dae9a - rustc_query_system[3ab3916a3edd70ab]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[2353b90057dd5f84]::plumbing::QueryCtxt, false> [INFO] [stderr] 22: 0x7e46183dab86 - rustc_query_impl[2353b90057dd5f84]::query_impl::mir_const_qualif::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 23: 0x7e46140168f0 - rustc_mir_transform[f52da0ade38d85eb]::mir_promoted [INFO] [stderr] 24: 0x7e4617b4ce12 - rustc_query_impl[2353b90057dd5f84]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 25: 0x7e4617b4d126 - rustc_query_system[3ab3916a3edd70ab]::query::plumbing::try_execute_query::, rustc_query_system[3ab3916a3edd70ab]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[2353b90057dd5f84]::plumbing::QueryCtxt, false> [INFO] [stderr] 26: 0x7e4617b4cc4c - rustc_query_impl[2353b90057dd5f84]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 27: 0x7e46187ad9f1 - rustc_borrowck[c9d836ebd411dea6]::mir_borrowck [INFO] [stderr] 28: 0x7e46187ad899 - rustc_query_impl[2353b90057dd5f84]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 29: 0x7e4617b315e5 - rustc_query_system[3ab3916a3edd70ab]::query::plumbing::try_execute_query::, rustc_query_system[3ab3916a3edd70ab]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[2353b90057dd5f84]::plumbing::QueryCtxt, false> [INFO] [stderr] 30: 0x7e4617b30e49 - rustc_query_impl[2353b90057dd5f84]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 31: 0x7e4617b2c418 - ::par_hir_body_owners::::{closure#0} [INFO] [stderr] 32: 0x7e4617b2bce8 - rustc_thread_pool[5261d82459708a3a]::join::join_context::::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#1}>::{closure#0}, rustc_thread_pool[5261d82459708a3a]::join::join::call<(), rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_slice::par_rec<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_for_each_in<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, &[rustc_span[be692f8603e923c0]::def_id::LocalDefId], ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#2}>::{closure#0}, (), ()>::{closure#0} [INFO] [stderr] 33: 0x7e4617b2badd - rustc_thread_pool[5261d82459708a3a]::join::join_context::::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#1}>::{closure#0}, rustc_thread_pool[5261d82459708a3a]::join::join::call<(), rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_slice::par_rec<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_for_each_in<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, &[rustc_span[be692f8603e923c0]::def_id::LocalDefId], ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#2}>::{closure#0}, (), ()>::{closure#0} [INFO] [stderr] 34: 0x7e4617b2bc69 - rustc_thread_pool[5261d82459708a3a]::join::join_context::::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#1}>::{closure#0}, rustc_thread_pool[5261d82459708a3a]::join::join::call<(), rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_slice::par_rec<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_for_each_in<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, &[rustc_span[be692f8603e923c0]::def_id::LocalDefId], ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#2}>::{closure#0}, (), ()>::{closure#0} [INFO] [stderr] 35: 0x7e4617b2b66f - rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_slice::par_rec::<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_for_each_in<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, &[rustc_span[be692f8603e923c0]::def_id::LocalDefId], ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}> [INFO] [stderr] 36: 0x7e46185ff047 - ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#1}>::{closure#0}, rustc_thread_pool[5261d82459708a3a]::join::join::call<(), rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_slice::par_rec<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, rustc_data_structures[410ae9866bc5f9ed]::sync::parallel::par_for_each_in<&rustc_span[be692f8603e923c0]::def_id::LocalDefId, &[rustc_span[be692f8603e923c0]::def_id::LocalDefId], ::par_hir_body_owners::{closure#0}>::{closure#0}::{closure#0}>::{closure#2}>::{closure#0}, (), ()>::{closure#0}::{closure#0}, ()> as rustc_thread_pool[5261d82459708a3a]::job::Job>::execute [INFO] [stderr] 37: 0x7e46185ff82a - ::wait_or_steal_until_cold [INFO] [stderr] 38: 0x7e46185fb6b5 - ::run [INFO] [stderr] 39: 0x7e46185fb52d - std[12c422ba0e8f2ccd]::sys::backtrace::__rust_begin_short_backtrace::<::build_scoped::{closure#1}, ()>::{closure#5}::{closure#0}::{closure#0}, rustc_interface[48cf4fa573a69c36]::util::run_in_thread_pool_with_globals::{closure#1}, ()>::{closure#5}::{closure#0}::{closure#1}, ()>::{closure#0}::{closure#0}::{closure#0}, ()> [INFO] [stderr] 40: 0x7e46185fa838 - <::spawn_unchecked_<::build_scoped::{closure#1}, ()>::{closure#5}::{closure#0}::{closure#0}, rustc_interface[48cf4fa573a69c36]::util::run_in_thread_pool_with_globals::{closure#1}, ()>::{closure#5}::{closure#0}::{closure#1}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>::{closure#1} as core[18170c64b6a218e4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 41: 0x7e46185f7435 - std::sys::pal::unix::thread::Thread::new::thread_start::h74991452e4c34e7b [INFO] [stderr] 42: 0x7e4612080aa4 - [INFO] [stderr] 43: 0x7e461210da34 - clone [INFO] [stderr] 44: 0x0 - [INFO] [stderr] [INFO] [stderr] 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 [INFO] [stderr] [INFO] [stderr] note: please make sure that you have updated to the latest nightly [INFO] [stderr] [INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/constvec-0.1.14/rustc-ice-2025-09-28T02_05_04-37.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.91.0-nightly (d79d87d4c 2025-09-05) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] query stack during panic: [INFO] [stderr] #0 [mir_const_qualif] const checking `::add` [INFO] [stderr] #1 [mir_promoted] promoting constants in MIR for `::add` [INFO] [stderr] #2 [mir_borrowck] borrow-checking `::add` [INFO] [stderr] #3 [analysis] running analysis passes on this crate [INFO] [stderr] end of query stack [INFO] [stderr] error: could not compile `constvec` (lib) due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "8584d04d3e9f2e3cfa4e6d83e1879408982525de8e0ab2b8f4dc7cdb9a570df3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8584d04d3e9f2e3cfa4e6d83e1879408982525de8e0ab2b8f4dc7cdb9a570df3", kill_on_drop: false }` [INFO] [stdout] 8584d04d3e9f2e3cfa4e6d83e1879408982525de8e0ab2b8f4dc7cdb9a570df3