[INFO] fetching crate velvet-core 0.4.2... [INFO] testing velvet-core-0.4.2 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2 [INFO] extracting crate velvet-core 0.4.2 into /workspace/builds/worker-1-tc2/source [INFO] started tweaking crates.io crate velvet-core 0.4.2 [INFO] finished tweaking crates.io crate velvet-core 0.4.2 [INFO] tweaked toml for crates.io crate velvet-core 0.4.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate velvet-core 0.4.2 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 89 packages to latest compatible versions [INFO] [stderr] Adding approx v0.4.0 (available: v0.5.1) [INFO] [stderr] Adding hdf5 v0.7.1 (available: v0.8.1) [INFO] [stderr] Adding hdf5-sys v0.7.1 (available: v0.8.1) [INFO] [stderr] Adding nalgebra v0.23.2 (available: v0.34.2) [INFO] [stderr] Adding pretty_env_logger v0.4.0 (available: v0.5.0) [INFO] [stderr] Adding rand v0.7.3 (available: v0.10.1) [INFO] [stderr] Adding rand_distr v0.3.0 (available: v0.6.0) [INFO] [stderr] Adding strum v0.20.0 (available: v0.28.0) [INFO] [stderr] Adding strum_macros v0.20.1 (available: v0.28.0) [INFO] [stderr] Adding typetag v0.1.8 (available: v0.2.21) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e771cd4a66c79ed3cfaaa79895df8596ec6d7778baf92d5f8f183d4633e9640f [INFO] running `Command { std: "docker" "start" "-a" "e771cd4a66c79ed3cfaaa79895df8596ec6d7778baf92d5f8f183d4633e9640f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e771cd4a66c79ed3cfaaa79895df8596ec6d7778baf92d5f8f183d4633e9640f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e771cd4a66c79ed3cfaaa79895df8596ec6d7778baf92d5f8f183d4633e9640f", kill_on_drop: false }` [INFO] [stdout] e771cd4a66c79ed3cfaaa79895df8596ec6d7778baf92d5f8f183d4633e9640f [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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a3b152b5d8565fa55cab019668fc97ae2bc78aceaeaabc9745ef2a1cc347a2b0 [INFO] running `Command { std: "docker" "start" "-a" "a3b152b5d8565fa55cab019668fc97ae2bc78aceaeaabc9745ef2a1cc347a2b0", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.185 [INFO] [stderr] Compiling libm v0.2.16 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Compiling aho-corasick v1.1.4 [INFO] [stderr] Compiling generic-array v0.14.9 [INFO] [stderr] Compiling num-rational v0.3.2 [INFO] [stderr] Compiling quick-error v1.2.3 [INFO] [stderr] Compiling humantime v1.3.0 [INFO] [stderr] Compiling ghost v0.1.20 [INFO] [stderr] Compiling matrixmultiply v0.2.4 [INFO] [stderr] Compiling strum v0.20.0 [INFO] [stderr] Compiling regex-automata v0.4.14 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling approx v0.4.0 [INFO] [stderr] Compiling num-integer v0.1.46 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling serde v1.0.228 [INFO] [stderr] Compiling rand_distr v0.3.0 [INFO] [stderr] Compiling num-complex v0.3.1 [INFO] [stderr] Compiling erased-serde v0.3.31 [INFO] [stderr] Compiling regex v1.12.3 [INFO] [stderr] Compiling simba v0.3.1 [INFO] [stderr] Compiling env_logger v0.7.1 [INFO] [stderr] Compiling pretty_env_logger v0.4.0 [INFO] [stderr] Compiling ctor v0.1.26 [INFO] [stderr] Compiling typetag-impl v0.1.8 [INFO] [stderr] Compiling strum_macros v0.20.1 [INFO] [stderr] Compiling inventory v0.2.3 [INFO] [stderr] Compiling typetag v0.1.8 [INFO] [stderr] Compiling nalgebra v0.23.2 [INFO] [stderr] [INFO] [stderr] thread 'rustc' (621) panicked at /rustc-dev/dec9417b8611e34e787a3e4c37686b5131f9e5c5/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::U1, base::dimension::U2> [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7a6a3ed9535b - <::print::DisplayBacktrace as core[6aaeda2c7ad07a48]::fmt::Display>::fmt [INFO] [stderr] 1: 0x7a6a3f42f248 - core[6aaeda2c7ad07a48]::fmt::write [INFO] [stderr] 2: 0x7a6a3edac366 - ::write_fmt [INFO] [stderr] 3: 0x7a6a3ed6b368 - std[e72de78501789eb0]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x7a6a3ed88763 - std[e72de78501789eb0]::panicking::default_hook [INFO] [stderr] 5: 0x7a6a3dd8566c - std[e72de78501789eb0]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x7a6a3ed88a42 - std[e72de78501789eb0]::panicking::panic_with_hook [INFO] [stderr] 7: 0x7a6a3ed6b428 - std[e72de78501789eb0]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x7a6a3ed62159 - std[e72de78501789eb0]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x7a6a3ed6ce8d - __rustc[78a4cf188af856fc]::rust_begin_unwind [INFO] [stderr] 10: 0x7a6a3be26f9c - core[6aaeda2c7ad07a48]::panicking::panic_fmt [INFO] [stderr] 11: 0x7a6a3b5795e2 - core[6aaeda2c7ad07a48]::result::unwrap_failed [INFO] [stderr] 12: 0x7a6a4011af0a - ::instantiate_ty_var::> [INFO] [stderr] 13: 0x7a6a4011d009 - >::relate::> [INFO] [stderr] 14: 0x7a6a4011db6d - > as rustc_type_ir[20f22f7553888b21]::interner::CollectAndApply>>::collect_and_apply::>, core[6aaeda2c7ad07a48]::iter::adapters::copied::Copied>>, rustc_type_ir[20f22f7553888b21]::relate::relate_args_invariantly>::{closure#0}>, ::mk_args_from_iter>, core[6aaeda2c7ad07a48]::iter::adapters::copied::Copied>>, rustc_type_ir[20f22f7553888b21]::relate::relate_args_invariantly>::{closure#0}>, core[6aaeda2c7ad07a48]::result::Result>>::{closure#0}> [INFO] [stderr] 15: 0x7a6a4011e2ce - rustc_type_ir[20f22f7553888b21]::relate::structurally_relate_tys::> [INFO] [stderr] 16: 0x7a6a4011b2cb - as rustc_type_ir[20f22f7553888b21]::relate::TypeRelation>::tys [INFO] [stderr] 17: 0x7a6a4011ac7c - ::instantiate_ty_var::> [INFO] [stderr] 18: 0x7a6a4011b358 - as rustc_type_ir[20f22f7553888b21]::relate::TypeRelation>::tys [INFO] [stderr] 19: 0x7a6a4011e5d3 - rustc_type_ir[20f22f7553888b21]::relate::structurally_relate_tys::> [INFO] [stderr] 20: 0x7a6a4011b2cb - as rustc_type_ir[20f22f7553888b21]::relate::TypeRelation>::tys [INFO] [stderr] 21: 0x7a6a4011d877 - > as rustc_type_ir[20f22f7553888b21]::interner::CollectAndApply>>::collect_and_apply::>, core[6aaeda2c7ad07a48]::iter::adapters::copied::Copied>>, rustc_type_ir[20f22f7553888b21]::relate::relate_args_invariantly>::{closure#0}>, ::mk_args_from_iter>, core[6aaeda2c7ad07a48]::iter::adapters::copied::Copied>>, rustc_type_ir[20f22f7553888b21]::relate::relate_args_invariantly>::{closure#0}>, core[6aaeda2c7ad07a48]::result::Result>>::{closure#0}> [INFO] [stderr] 22: 0x7a6a3f46d172 - ::eq_trace::> [INFO] [stderr] 23: 0x7a6a3fe3b754 - rustc_trait_selection[8cb020d34d4ddd]::traits::coherence::overlap [INFO] [stderr] 24: 0x7a6a3b464017 - ::insert [INFO] [stderr] 25: 0x7a6a403a85b5 - ::insert [INFO] [stderr] 26: 0x7a6a3f44b534 - rustc_trait_selection[8cb020d34d4ddd]::traits::specialize::specialization_graph_provider [INFO] [stderr] 27: 0x7a6a3f44f04d - rustc_query_impl[187e90d83ba42732]::execution::try_execute_query::>, false> [INFO] [stderr] 28: 0x7a6a3f5695a4 - rustc_query_impl[187e90d83ba42732]::query_impl::specialization_graph_of::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 29: 0x7a6a3f56ccc7 - rustc_hir_analysis[9443468e5116f6d9]::coherence::coherent_trait [INFO] [stderr] 30: 0x7a6a3f56c9df - rustc_query_impl[187e90d83ba42732]::query_impl::coherent_trait::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 31: 0x7a6a3f8931ec - rustc_query_impl[187e90d83ba42732]::execution::try_execute_query::>, false> [INFO] [stderr] 32: 0x7a6a3f892340 - rustc_query_impl[187e90d83ba42732]::query_impl::coherent_trait::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 33: 0x7a6a3faa522e - rustc_hir_analysis[9443468e5116f6d9]::check::check::check_item_type [INFO] [stderr] 34: 0x7a6a3faa36e6 - rustc_hir_analysis[9443468e5116f6d9]::check::wfcheck::check_well_formed [INFO] [stderr] 35: 0x7a6a3faa36c7 - rustc_query_impl[187e90d83ba42732]::query_impl::check_well_formed::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 36: 0x7a6a3faa2ce4 - rustc_query_impl[187e90d83ba42732]::execution::try_execute_query::, rustc_middle[ff930705cf6dddea]::dep_graph::graph::DepNodeIndex>, false> [INFO] [stderr] 37: 0x7a6a3faa2a7b - rustc_query_impl[187e90d83ba42732]::query_impl::check_well_formed::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 38: 0x7a6a3fa9f1f3 - rustc_hir_analysis[9443468e5116f6d9]::check::wfcheck::check_type_wf [INFO] [stderr] 39: 0x7a6a3fa9f0ef - rustc_query_impl[187e90d83ba42732]::query_impl::check_type_wf::invoke_provider_fn::__rust_begin_short_backtrace [INFO] [stderr] 40: 0x7a6a40654850 - rustc_query_impl[187e90d83ba42732]::execution::try_execute_query::>, false> [INFO] [stderr] 41: 0x7a6a40654629 - rustc_query_impl[187e90d83ba42732]::query_impl::check_type_wf::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 42: 0x7a6a3fce1f55 - rustc_hir_analysis[9443468e5116f6d9]::check_crate [INFO] [stderr] 43: 0x7a6a3f4e46da - rustc_interface[8fb07a87386d2e99]::passes::analysis [INFO] [stderr] 44: 0x7a6a40656fc9 - rustc_query_impl[187e90d83ba42732]::execution::try_execute_query::>, false> [INFO] [stderr] 45: 0x7a6a40656c35 - rustc_query_impl[187e90d83ba42732]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 46: 0x7a6a40701414 - rustc_interface[8fb07a87386d2e99]::interface::run_compiler::<(), rustc_driver_impl[1568c1d64401f343]::run_compiler::{closure#0}>::{closure#1} [INFO] [stderr] 47: 0x7a6a4061e87e - std[e72de78501789eb0]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 48: 0x7a6a4061f120 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[6aaeda2c7ad07a48]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 49: 0x7a6a4061ffac - ::new::thread_start [INFO] [stderr] 50: 0x7a6a3a08aaa4 - [INFO] [stderr] 51: 0x7a6a3a117a64 - 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-0.23.2/rustc-ice-2026-04-20T01_21_10-616.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.96.0-nightly (dec9417b8 2026-03-22) 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/dec9417b8611e34e787a3e4c37686b5131f9e5c5/bin/rustc --crate-name nalgebra --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nalgebra-0.23.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="matrixmultiply"' --cfg 'feature="rand_distr"' --cfg 'feature="serde"' --cfg 'feature="serde-serialize"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("abomonation", "abomonation-serialize", "alga", "alloc", "arbitrary", "compare", "debug", "default", "io", "libm", "libm-force", "matrixcompare-core", "matrixmultiply", "mint", "pest", "pest_derive", "quickcheck", "rand_distr", "serde", "serde-serialize", "sparse", "std", "stdweb"))' -C metadata=46cdc42297fb885b -C extra-filename=-ef5a88b17c1ebff0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-d2a7c15ea66eed36.rmeta --extern generic_array=/opt/rustwide/target/debug/deps/libgeneric_array-a98b97075066d2b8.rmeta --extern matrixmultiply=/opt/rustwide/target/debug/deps/libmatrixmultiply-6ada86cb6866caa9.rmeta --extern num_complex=/opt/rustwide/target/debug/deps/libnum_complex-a55804e6e2ccab44.rmeta --extern num_rational=/opt/rustwide/target/debug/deps/libnum_rational-182e15c9b6b8e355.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-8bc9f59f2adcb18d.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-81f7393657ef7487.rmeta --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-2d8258579f20e962.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-135cf3cae6658505.rmeta --extern simba=/opt/rustwide/target/debug/deps/libsimba-db70a65aae555280.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-4b32722807e2cb87.rmeta --cap-lints allow --cap-lints=forbid` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "a3b152b5d8565fa55cab019668fc97ae2bc78aceaeaabc9745ef2a1cc347a2b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a3b152b5d8565fa55cab019668fc97ae2bc78aceaeaabc9745ef2a1cc347a2b0", kill_on_drop: false }` [INFO] [stdout] a3b152b5d8565fa55cab019668fc97ae2bc78aceaeaabc9745ef2a1cc347a2b0