[INFO] fetching crate mcrt 0.3.0...
[INFO] testing mcrt-0.3.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mcrt 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate mcrt 0.3.0
[INFO] finished tweaking crates.io crate mcrt 0.3.0
[INFO] tweaked toml for crates.io crate mcrt 0.3.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mcrt 0.3.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mcrt 0.3.0 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f22c1cc3b2ebab5c4be7761a2abae7c4d368b1fa0a25b625d6191972d780cdb0
[INFO] running `Command { std: "docker" "start" "-a" "f22c1cc3b2ebab5c4be7761a2abae7c4d368b1fa0a25b625d6191972d780cdb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f22c1cc3b2ebab5c4be7761a2abae7c4d368b1fa0a25b625d6191972d780cdb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f22c1cc3b2ebab5c4be7761a2abae7c4d368b1fa0a25b625d6191972d780cdb0", kill_on_drop: false }`
[INFO] [stdout] f22c1cc3b2ebab5c4be7761a2abae7c4d368b1fa0a25b625d6191972d780cdb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0dae1cb2c05b1d0029e7c9eff00fcfcb6130616c22a9b629e4a398e4b2b829a5
[INFO] running `Command { std: "docker" "start" "-a" "0dae1cb2c05b1d0029e7c9eff00fcfcb6130616c22a9b629e4a398e4b2b829a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
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[INFO] [stderr]    Compiling libm v0.2.1
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[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.116
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[INFO] [stderr]    Compiling quote v1.0.7
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[INFO] [stderr]    Compiling phf_codegen v0.8.0
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[INFO] [stderr]    Compiling terminal_size v0.1.15
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[INFO] [stderr] 
[INFO] [stderr] thread 'rustc' (2666) panicked at /rustc-dev/562dee4820c458d823175268e41601d4c060588a/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::matrix::Matrix<?20t, base::dimension::U1, base::dimension::U2, ?21t>, base::dimension::U1, base::dimension::U2>
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x78c09a38455b - <<std[31e582c13f4e914f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[fa0eadad68403074]::fmt::Display>::fmt
[INFO] [stderr]    1:     0x78c09aa2e8c8 - core[fa0eadad68403074]::fmt::write
[INFO] [stderr]    2:     0x78c09a39b566 - <std[31e582c13f4e914f]::sys::stdio::unix::Stderr as std[31e582c13f4e914f]::io::Write>::write_fmt
[INFO] [stderr]    3:     0x78c09a35a568 - std[31e582c13f4e914f]::panicking::default_hook::{closure#0}
[INFO] [stderr]    4:     0x78c09a377963 - std[31e582c13f4e914f]::panicking::default_hook
[INFO] [stderr]    5:     0x78c099373dbc - std[31e582c13f4e914f]::panicking::update_hook::<alloc[49b8922c36ca62de]::boxed::Box<rustc_driver_impl[5d9f716931f6bd73]::install_ice_hook::{closure#1}>>::{closure#0}
[INFO] [stderr]    6:     0x78c09a377c42 - std[31e582c13f4e914f]::panicking::panic_with_hook
[INFO] [stderr]    7:     0x78c09a35a628 - std[31e582c13f4e914f]::panicking::panic_handler::{closure#0}
[INFO] [stderr]    8:     0x78c09a34eb79 - std[31e582c13f4e914f]::sys::backtrace::__rust_end_short_backtrace::<std[31e582c13f4e914f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]    9:     0x78c09a35c08d - __rustc[fc8e3a9f23f26cb]::rust_begin_unwind
[INFO] [stderr]   10:     0x78c0973aaf7c - core[fa0eadad68403074]::panicking::panic_fmt
[INFO] [stderr]   11:     0x78c096c2b312 - core[fa0eadad68403074]::result::unwrap_failed
[INFO] [stderr]   12:     0x78c09b73904a - <rustc_infer[ed2e36562c4400a5]::infer::InferCtxt>::instantiate_ty_var::<rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   13:     0x78c09b73b149 - <rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg as rustc_type_ir[bdf822ca6a2ba2d7]::relate::Relate<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::relate::<rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   14:     0x78c09b73bcad - <core[fa0eadad68403074]::result::Result<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, rustc_type_ir[bdf822ca6a2ba2d7]::error::TypeError<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>> as rustc_type_ir[bdf822ca6a2ba2d7]::interner::CollectAndApply<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, &rustc_middle[bc4b12ab5fd100e2]::ty::list::RawList<(), rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>::collect_and_apply::<core[fa0eadad68403074]::iter::adapters::map::Map<core[fa0eadad68403074]::iter::adapters::zip::Zip<core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>, core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>, rustc_type_ir[bdf822ca6a2ba2d7]::relate::relate_args_invariantly<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::{closure#0}>, <rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>::mk_args_from_iter<core[fa0eadad68403074]::iter::adapters::map::Map<core[fa0eadad68403074]::iter::adapters::zip::Zip<core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>, core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>, rustc_type_ir[bdf822ca6a2ba2d7]::relate::relate_args_invariantly<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::{closure#0}>, core[fa0eadad68403074]::result::Result<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, rustc_type_ir[bdf822ca6a2ba2d7]::error::TypeError<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>>::{closure#0}>
[INFO] [stderr]   15:     0x78c09b73c40e - rustc_type_ir[bdf822ca6a2ba2d7]::relate::structurally_relate_tys::<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   16:     0x78c09b73940b - <rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt> as rustc_type_ir[bdf822ca6a2ba2d7]::relate::TypeRelation<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::tys
[INFO] [stderr]   17:     0x78c09b738dbc - <rustc_infer[ed2e36562c4400a5]::infer::InferCtxt>::instantiate_ty_var::<rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   18:     0x78c09b739498 - <rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt> as rustc_type_ir[bdf822ca6a2ba2d7]::relate::TypeRelation<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::tys
[INFO] [stderr]   19:     0x78c09b73c713 - rustc_type_ir[bdf822ca6a2ba2d7]::relate::structurally_relate_tys::<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   20:     0x78c09b73940b - <rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt> as rustc_type_ir[bdf822ca6a2ba2d7]::relate::TypeRelation<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::tys
[INFO] [stderr]   21:     0x78c09b73b9b7 - <core[fa0eadad68403074]::result::Result<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, rustc_type_ir[bdf822ca6a2ba2d7]::error::TypeError<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>> as rustc_type_ir[bdf822ca6a2ba2d7]::interner::CollectAndApply<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, &rustc_middle[bc4b12ab5fd100e2]::ty::list::RawList<(), rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>::collect_and_apply::<core[fa0eadad68403074]::iter::adapters::map::Map<core[fa0eadad68403074]::iter::adapters::zip::Zip<core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>, core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>, rustc_type_ir[bdf822ca6a2ba2d7]::relate::relate_args_invariantly<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::{closure#0}>, <rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>::mk_args_from_iter<core[fa0eadad68403074]::iter::adapters::map::Map<core[fa0eadad68403074]::iter::adapters::zip::Zip<core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>, core[fa0eadad68403074]::iter::adapters::copied::Copied<core[fa0eadad68403074]::slice::iter::Iter<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg>>>, rustc_type_ir[bdf822ca6a2ba2d7]::relate::relate_args_invariantly<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt, rustc_type_ir[bdf822ca6a2ba2d7]::relate::solver_relating::SolverRelating<rustc_infer[ed2e36562c4400a5]::infer::InferCtxt, rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>::{closure#0}>, core[fa0eadad68403074]::result::Result<rustc_middle[bc4b12ab5fd100e2]::ty::generic_args::GenericArg, rustc_type_ir[bdf822ca6a2ba2d7]::error::TypeError<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>>::{closure#0}>
[INFO] [stderr]   22:     0x78c09aaa3bf2 - <rustc_infer[ed2e36562c4400a5]::infer::at::At>::eq_trace::<rustc_type_ir[bdf822ca6a2ba2d7]::predicate::TraitRef<rustc_middle[bc4b12ab5fd100e2]::ty::context::TyCtxt>>
[INFO] [stderr]   23:     0x78c09b47f194 - rustc_trait_selection[4094b86ae93e66fa]::traits::coherence::overlap
[INFO] [stderr]   24:     0x78c096a61287 - <rustc_middle[bc4b12ab5fd100e2]::traits::specialization_graph::Children as rustc_trait_selection[4094b86ae93e66fa]::traits::specialize::specialization_graph::ChildrenExt>::insert
[INFO] [stderr]   25:     0x78c09badb571 - <rustc_middle[bc4b12ab5fd100e2]::traits::specialization_graph::Graph as rustc_trait_selection[4094b86ae93e66fa]::traits::specialize::specialization_graph::GraphExt>::insert
[INFO] [stderr]   26:     0x78c09aa4a8b4 - rustc_trait_selection[4094b86ae93e66fa]::traits::specialize::specialization_graph_provider
[INFO] [stderr]   27:     0x78c09aa4e3cd - rustc_query_impl[787df1eb52488c09]::execution::try_execute_query::<rustc_middle[bc4b12ab5fd100e2]::query::caches::DefIdCache<rustc_middle[bc4b12ab5fd100e2]::query::erase::ErasedData<[u8; 8usize]>>, false>
[INFO] [stderr]   28:     0x78c09ad45a54 - rustc_query_impl[787df1eb52488c09]::query_impl::specialization_graph_of::execute_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   29:     0x78c09ad49187 - rustc_hir_analysis[6f8e47aab4b5577f]::coherence::coherent_trait
[INFO] [stderr]   30:     0x78c09ad48e9d - rustc_query_impl[787df1eb52488c09]::query_impl::coherent_trait::invoke_provider_fn::__rust_begin_short_backtrace
[INFO] [stderr]   31:     0x78c09af69cec - rustc_query_impl[787df1eb52488c09]::execution::try_execute_query::<rustc_middle[bc4b12ab5fd100e2]::query::caches::DefIdCache<rustc_middle[bc4b12ab5fd100e2]::query::erase::ErasedData<[u8; 1usize]>>, false>
[INFO] [stderr]   32:     0x78c09af68e40 - rustc_query_impl[787df1eb52488c09]::query_impl::coherent_trait::execute_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   33:     0x78c09b0d4bee - rustc_hir_analysis[6f8e47aab4b5577f]::check::check::check_item_type
[INFO] [stderr]   34:     0x78c09b0d30a6 - rustc_hir_analysis[6f8e47aab4b5577f]::check::wfcheck::check_well_formed
[INFO] [stderr]   35:     0x78c09b0d3087 - rustc_query_impl[787df1eb52488c09]::query_impl::check_well_formed::invoke_provider_fn::__rust_begin_short_backtrace
[INFO] [stderr]   36:     0x78c09b0d26a4 - rustc_query_impl[787df1eb52488c09]::execution::try_execute_query::<rustc_data_structures[ef7423e94b6ebcb4]::vec_cache::VecCache<rustc_span[f92cf30e8af894a0]::def_id::LocalDefId, rustc_middle[bc4b12ab5fd100e2]::query::erase::ErasedData<[u8; 1usize]>, rustc_middle[bc4b12ab5fd100e2]::dep_graph::graph::DepNodeIndex>, false>
[INFO] [stderr]   37:     0x78c09b0d243b - rustc_query_impl[787df1eb52488c09]::query_impl::check_well_formed::execute_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   38:     0x78c09b0cebb3 - rustc_hir_analysis[6f8e47aab4b5577f]::check::wfcheck::check_type_wf
[INFO] [stderr]   39:     0x78c09b0ceaaf - rustc_query_impl[787df1eb52488c09]::query_impl::check_type_wf::invoke_provider_fn::__rust_begin_short_backtrace
[INFO] [stderr]   40:     0x78c09bc6dd50 - rustc_query_impl[787df1eb52488c09]::execution::try_execute_query::<rustc_middle[bc4b12ab5fd100e2]::query::caches::SingleCache<rustc_middle[bc4b12ab5fd100e2]::query::erase::ErasedData<[u8; 1usize]>>, false>
[INFO] [stderr]   41:     0x78c09bc6db29 - rustc_query_impl[787df1eb52488c09]::query_impl::check_type_wf::execute_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   42:     0x78c09af5e055 - rustc_hir_analysis[6f8e47aab4b5577f]::check_crate
[INFO] [stderr]   43:     0x78c09ab110da - rustc_interface[fa77fbe53284b165]::passes::analysis
[INFO] [stderr]   44:     0x78c09bc704c9 - rustc_query_impl[787df1eb52488c09]::execution::try_execute_query::<rustc_middle[bc4b12ab5fd100e2]::query::caches::SingleCache<rustc_middle[bc4b12ab5fd100e2]::query::erase::ErasedData<[u8; 0usize]>>, false>
[INFO] [stderr]   45:     0x78c09bc70135 - rustc_query_impl[787df1eb52488c09]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   46:     0x78c09bd32194 - rustc_interface[fa77fbe53284b165]::interface::run_compiler::<(), rustc_driver_impl[5d9f716931f6bd73]::run_compiler::{closure#0}>::{closure#1}
[INFO] [stderr]   47:     0x78c09bc43f3e - std[31e582c13f4e914f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[fa77fbe53284b165]::util::run_in_thread_with_globals<rustc_interface[fa77fbe53284b165]::util::run_in_thread_pool_with_globals<rustc_interface[fa77fbe53284b165]::interface::run_compiler<(), rustc_driver_impl[5d9f716931f6bd73]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
[INFO] [stderr]   48:     0x78c09bc447e0 - <std[31e582c13f4e914f]::thread::lifecycle::spawn_unchecked<rustc_interface[fa77fbe53284b165]::util::run_in_thread_with_globals<rustc_interface[fa77fbe53284b165]::util::run_in_thread_pool_with_globals<rustc_interface[fa77fbe53284b165]::interface::run_compiler<(), rustc_driver_impl[5d9f716931f6bd73]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[fa0eadad68403074]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr]   49:     0x78c09bc4566c - <std[31e582c13f4e914f]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stderr]   50:     0x78c09568aaa4 - <unknown>
[INFO] [stderr]   51:     0x78c095717a64 - clone
[INFO] [stderr]   52:                0x0 - <unknown>
[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-0.23.0/rustc-ice-2026-04-10T09_39_57-2664.txt`: Read-only file system (os error 30)
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.96.0-nightly (562dee482 2026-03-21) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C codegen-units=16 -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::<impl at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nalgebra-0.23.0/src/base/conversion.rs:111:9: 113:61>` 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/562dee4820c458d823175268e41601d4c060588a/bin/rustc --crate-name nalgebra --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nalgebra-0.23.0/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 codegen-units=16 -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=2e53b9f01dd74e90 -C extra-filename=-ea067857d74d6824 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-89e50028e44281c3.rmeta --extern generic_array=/opt/rustwide/target/debug/deps/libgeneric_array-647964f108965fc1.rmeta --extern matrixmultiply=/opt/rustwide/target/debug/deps/libmatrixmultiply-896597bfbdd28edb.rmeta --extern num_complex=/opt/rustwide/target/debug/deps/libnum_complex-6a837ce576e98c74.rmeta --extern num_rational=/opt/rustwide/target/debug/deps/libnum_rational-f63e95f6ccd23034.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-cd5f6bc5bd28ce85.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-463eb26ab61b5cbb.rmeta --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-fe29f7447f4f6e3e.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-35333ca7c7df2fb8.rmeta --extern simba=/opt/rustwide/target/debug/deps/libsimba-7be54a4b0cddb29b.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-93a056ac0b88c838.rmeta --cap-lints allow --cap-lints=forbid` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "0dae1cb2c05b1d0029e7c9eff00fcfcb6130616c22a9b629e4a398e4b2b829a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dae1cb2c05b1d0029e7c9eff00fcfcb6130616c22a9b629e4a398e4b2b829a5", kill_on_drop: false }`
[INFO] [stdout] 0dae1cb2c05b1d0029e7c9eff00fcfcb6130616c22a9b629e4a398e4b2b829a5