[INFO] fetching crate fcdb-exec 0.1.0... [INFO] checking fcdb-exec-0.1.0 against try#1463461488056994d1b84e8b752e7c11c7fae7aa for pr-154205 [INFO] extracting crate fcdb-exec 0.1.0 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate fcdb-exec 0.1.0 [INFO] finished tweaking crates.io crate fcdb-exec 0.1.0 [INFO] tweaked toml for crates.io crate fcdb-exec 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate fcdb-exec 0.1.0 on toolchain 1463461488056994d1b84e8b752e7c11c7fae7aa [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate fcdb-exec 0.1.0 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" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d0ada3fa3a3bd30faa85862c7574fa9284087554db06e6dfe99ce30cb1880da2 [INFO] running `Command { std: "docker" "start" "-a" "d0ada3fa3a3bd30faa85862c7574fa9284087554db06e6dfe99ce30cb1880da2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d0ada3fa3a3bd30faa85862c7574fa9284087554db06e6dfe99ce30cb1880da2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d0ada3fa3a3bd30faa85862c7574fa9284087554db06e6dfe99ce30cb1880da2", kill_on_drop: false }` [INFO] [stdout] d0ada3fa3a3bd30faa85862c7574fa9284087554db06e6dfe99ce30cb1880da2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f1272cae5eaf3ea83fdc3e565b52e49b77fc5081cf40743080ef4351ea82bcf9 [INFO] running `Command { std: "docker" "start" "-a" "f1272cae5eaf3ea83fdc3e565b52e49b77fc5081cf40743080ef4351ea82bcf9", kill_on_drop: false }` [INFO] [stderr] Compiling libm v0.2.15 [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling libc v0.2.177 [INFO] [stderr] Compiling unicode-ident v1.0.19 [INFO] [stderr] Compiling quote v1.0.41 [INFO] [stderr] Checking cfg-if v1.0.3 [INFO] [stderr] Compiling zerocopy v0.8.27 [INFO] [stderr] Compiling find-msvc-tools v0.1.4 [INFO] [stderr] Checking bytemuck v1.24.0 [INFO] [stderr] Compiling serde_json v1.0.145 [INFO] [stderr] Checking arrayref v0.3.9 [INFO] [stderr] Checking arrayvec v0.7.6 [INFO] [stderr] Checking memchr v2.7.6 [INFO] [stderr] Checking itoa v1.0.15 [INFO] [stderr] Checking constant_time_eq v0.3.1 [INFO] [stderr] Checking ryu v1.0.20 [INFO] [stderr] Checking hex v0.4.3 [INFO] [stderr] Checking integer-encoding v3.0.4 [INFO] [stderr] Checking bit-vec v0.4.4 [INFO] [stderr] Compiling cc v1.2.41 [INFO] [stderr] Checking bloom v0.3.2 [INFO] [stderr] Checking safe_arch v0.7.4 [INFO] [stderr] Checking wide v0.7.33 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Checking getrandom v0.2.16 [INFO] [stderr] Compiling blake3 v1.8.2 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking num-integer v0.1.46 [INFO] [stderr] Checking num-complex v0.4.6 [INFO] [stderr] Checking approx v0.5.1 [INFO] [stderr] Checking num-rational v0.4.2 [INFO] [stderr] Checking simba v0.6.0 [INFO] [stderr] Checking ppv-lite86 v0.2.21 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Checking rand_distr v0.4.3 [INFO] [stderr] Compiling nalgebra-macros v0.1.0 [INFO] [stderr] Checking nalgebra v0.29.0 [INFO] [stderr] Checking serde v1.0.228 [INFO] [stderr] Checking fcdb-core v0.1.1 [INFO] [stderr] [INFO] [stderr] thread 'rustc' (636) panicked at /rustc-dev/1463461488056994d1b84e8b752e7c11c7fae7aa/compiler/rustc_infer/src/infer/relate/generalize.rs:294:44: [INFO] [stderr] called `Result::unwrap_err()` on an `Ok` value: base::array_storage::ArrayStorage, base::dimension::Const<1_usize>, ?21t>, ?0c, 1_usize> [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x76eaa498329b - <::print::DisplayBacktrace as core[dce7ba9de88d7a1a]::fmt::Display>::fmt [INFO] [stderr] 1: 0x76eaa502e1c8 - core[dce7ba9de88d7a1a]::fmt::write [INFO] [stderr] 2: 0x76eaa499a2a6 - ::write_fmt [INFO] [stderr] 3: 0x76eaa4959368 - std[843dc0b1bda91b1f]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x76eaa4976763 - std[843dc0b1bda91b1f]::panicking::default_hook [INFO] [stderr] 5: 0x76eaa39726cc - std[843dc0b1bda91b1f]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x76eaa4976a42 - std[843dc0b1bda91b1f]::panicking::panic_with_hook [INFO] [stderr] 7: 0x76eaa4959428 - std[843dc0b1bda91b1f]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x76eaa494d979 - std[843dc0b1bda91b1f]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x76eaa495ae8d - __rustc[e785788a2a4cee43]::rust_begin_unwind [INFO] [stderr] 10: 0x76eaa19d484c - core[dce7ba9de88d7a1a]::panicking::panic_fmt [INFO] [stderr] 11: 0x76eaa122a352 - core[dce7ba9de88d7a1a]::result::unwrap_failed [INFO] [stderr] 12: 0x76eaa5d7558a - ::instantiate_ty_var::> [INFO] [stderr] 13: 0x76eaa5d77689 - >::relate::> [INFO] [stderr] 14: 0x76eaa5d781ed - > as rustc_type_ir[8fabab40a76babfd]::interner::CollectAndApply>>::collect_and_apply::>, core[dce7ba9de88d7a1a]::iter::adapters::copied::Copied>>, rustc_type_ir[8fabab40a76babfd]::relate::relate_args_invariantly>::{closure#0}>, ::mk_args_from_iter>, core[dce7ba9de88d7a1a]::iter::adapters::copied::Copied>>, rustc_type_ir[8fabab40a76babfd]::relate::relate_args_invariantly>::{closure#0}>, core[dce7ba9de88d7a1a]::result::Result>>::{closure#0}> [INFO] [stderr] 15: 0x76eaa5d7894e - rustc_type_ir[8fabab40a76babfd]::relate::structurally_relate_tys::> [INFO] [stderr] 16: 0x76eaa5d7594b - as rustc_type_ir[8fabab40a76babfd]::relate::TypeRelation>::tys [INFO] [stderr] 17: 0x76eaa5d752fc - ::instantiate_ty_var::> [INFO] [stderr] 18: 0x76eaa5d759d8 - as rustc_type_ir[8fabab40a76babfd]::relate::TypeRelation>::tys [INFO] [stderr] 19: 0x76eaa5d78c53 - rustc_type_ir[8fabab40a76babfd]::relate::structurally_relate_tys::> [INFO] [stderr] 20: 0x76eaa5d7594b - as rustc_type_ir[8fabab40a76babfd]::relate::TypeRelation>::tys [INFO] [stderr] 21: 0x76eaa5d77ef7 - > as rustc_type_ir[8fabab40a76babfd]::interner::CollectAndApply>>::collect_and_apply::>, core[dce7ba9de88d7a1a]::iter::adapters::copied::Copied>>, rustc_type_ir[8fabab40a76babfd]::relate::relate_args_invariantly>::{closure#0}>, ::mk_args_from_iter>, core[dce7ba9de88d7a1a]::iter::adapters::copied::Copied>>, rustc_type_ir[8fabab40a76babfd]::relate::relate_args_invariantly>::{closure#0}>, core[dce7ba9de88d7a1a]::result::Result>>::{closure#0}> [INFO] [stderr] 22: 0x76eaa506c672 - ::eq_trace::> [INFO] [stderr] 23: 0x76eaa5b1aad4 - rustc_trait_selection[cfd3ad7859c28c26]::traits::coherence::overlap [INFO] [stderr] 24: 0x76eaa1060267 - ::insert [INFO] [stderr] 25: 0x76eaa5ffe8f5 - ::insert [INFO] [stderr] 26: 0x76eaa504a9b8 - rustc_trait_selection[cfd3ad7859c28c26]::traits::specialize::specialization_graph_provider [INFO] [stderr] 27: 0x76eaa504e4cd - rustc_query_impl[1fc1e7360a113360]::execution::try_execute_query::>, false> [INFO] [stderr] 28: 0x76eaa53e640e - rustc_query_impl[1fc1e7360a113360]::query_impl::specialization_graph_of::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 29: 0x76eaa53e9b47 - rustc_hir_analysis[2f4c9b906a3986d9]::coherence::coherent_trait [INFO] [stderr] 30: 0x76eaa53e985d - rustc_query_impl[1fc1e7360a113360]::query_impl::coherent_trait::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 31: 0x76eaa541656c - rustc_query_impl[1fc1e7360a113360]::execution::try_execute_query::>, false> [INFO] [stderr] 32: 0x76eaa54156c0 - rustc_query_impl[1fc1e7360a113360]::query_impl::coherent_trait::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 33: 0x76eaa55b346e - rustc_hir_analysis[2f4c9b906a3986d9]::check::check::check_item_type [INFO] [stderr] 34: 0x76eaa55b1926 - rustc_hir_analysis[2f4c9b906a3986d9]::check::wfcheck::check_well_formed [INFO] [stderr] 35: 0x76eaa55b1907 - rustc_query_impl[1fc1e7360a113360]::query_impl::check_well_formed::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 36: 0x76eaa55b0f24 - rustc_query_impl[1fc1e7360a113360]::execution::try_execute_query::, rustc_middle[5d9d7ac3bbddb1]::dep_graph::graph::DepNodeIndex>, false> [INFO] [stderr] 37: 0x76eaa55b0cbb - rustc_query_impl[1fc1e7360a113360]::query_impl::check_well_formed::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 38: 0x76eaa55ad473 - rustc_hir_analysis[2f4c9b906a3986d9]::check::wfcheck::check_type_wf [INFO] [stderr] 39: 0x76eaa55ad36f - rustc_query_impl[1fc1e7360a113360]::query_impl::check_type_wf::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 40: 0x76eaa6284f10 - rustc_query_impl[1fc1e7360a113360]::execution::try_execute_query::>, false> [INFO] [stderr] 41: 0x76eaa6284ce9 - rustc_query_impl[1fc1e7360a113360]::query_impl::check_type_wf::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 42: 0x76eaa58edf15 - rustc_hir_analysis[2f4c9b906a3986d9]::check_crate [INFO] [stderr] 43: 0x76eaa50e499a - rustc_interface[c96cb931c9593f25]::passes::analysis [INFO] [stderr] 44: 0x76eaa6287689 - rustc_query_impl[1fc1e7360a113360]::execution::try_execute_query::>, false> [INFO] [stderr] 45: 0x76eaa62872f5 - rustc_query_impl[1fc1e7360a113360]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 46: 0x76eaa6245e94 - rustc_interface[c96cb931c9593f25]::interface::run_compiler::<(), rustc_driver_impl[d313e8536c53b373]::run_compiler::{closure#0}>::{closure#1} [INFO] [stderr] 47: 0x76eaa62702be - std[843dc0b1bda91b1f]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 48: 0x76eaa6270b60 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[dce7ba9de88d7a1a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 49: 0x76eaa62719ec - ::new::thread_start [INFO] [stderr] 50: 0x76ea9fc8aaa4 - [INFO] [stderr] 51: 0x76ea9fd17a64 - clone [INFO] [stderr] 52: 0x0 - [INFO] [stderr] [INFO] [stderr] error: the compiler unexpectedly panicked. This is a bug [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/nalgebra-0.29.0/rustc-ice-2026-03-24T07_29_04-633.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.96.0-nightly (146346148 2026-03-23) 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 [specialization_graph_of] building specialization graph of trait `core::convert::From` [INFO] [stderr] #1 [coherent_trait] coherence checking all impls of trait `core::convert::From` [INFO] [stderr] #2 [check_well_formed] checking that `base::conversion::` is well-formed [INFO] [stderr] #3 [check_type_wf] checking that types are well-formed [INFO] [stderr] #4 [analysis] running analysis passes on crate `nalgebra` [INFO] [stderr] end of query stack [INFO] [stderr] error: could not compile `nalgebra` (lib) [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1463461488056994d1b84e8b752e7c11c7fae7aa/bin/rustc --crate-name nalgebra --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nalgebra-0.29.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="macros"' --cfg 'feature="matrixmultiply"' --cfg 'feature="nalgebra-macros"' --cfg 'feature="rand"' --cfg 'feature="rand-no-std"' --cfg 'feature="rand-package"' --cfg 'feature="rand_distr"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("abomonation", "abomonation-serialize", "alga", "alloc", "arbitrary", "bytemuck", "compare", "convert-bytemuck", "convert-glam013", "convert-glam014", "convert-glam015", "convert-glam016", "convert-glam017", "convert-mint", "debug", "default", "glam013", "glam014", "glam015", "glam016", "glam017", "io", "libm", "libm-force", "macros", "matrixcompare-core", "matrixmultiply", "mint", "nalgebra-macros", "pest", "pest_derive", "proptest", "proptest-support", "quickcheck", "rand", "rand-no-std", "rand-package", "rand_distr", "rkyv", "rkyv-serialize", "rkyv-serialize-no-std", "serde", "serde-serialize", "serde-serialize-no-std", "slow-tests", "sparse", "std"))' -C metadata=069c2be4201ffefd -C extra-filename=-bf574ec7f8b72414 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-47411005e50c8fb9.rmeta --extern matrixmultiply=/opt/rustwide/target/debug/deps/libmatrixmultiply-948f83bf4c3b1cf4.rmeta --extern nalgebra_macros=/opt/rustwide/target/debug/deps/libnalgebra_macros-ab8bcc50673f6f06.so --extern num_complex=/opt/rustwide/target/debug/deps/libnum_complex-b1bb2de258f5be68.rmeta --extern num_rational=/opt/rustwide/target/debug/deps/libnum_rational-41439c7a5d86d12c.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-314a28d551676042.rmeta --extern rand_package=/opt/rustwide/target/debug/deps/librand-ddeb0f26fe9e81c8.rmeta --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-b40e51603e4aac0c.rmeta --extern simba=/opt/rustwide/target/debug/deps/libsimba-cd90193c90122157.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-2001cc7989580d48.rmeta --cap-lints allow --cap-lints=forbid` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "f1272cae5eaf3ea83fdc3e565b52e49b77fc5081cf40743080ef4351ea82bcf9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f1272cae5eaf3ea83fdc3e565b52e49b77fc5081cf40743080ef4351ea82bcf9", kill_on_drop: false }` [INFO] [stdout] f1272cae5eaf3ea83fdc3e565b52e49b77fc5081cf40743080ef4351ea82bcf9