[INFO] updating cached repository https://github.com/nikolads/fmi-parallel-dfs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 34d796073122691d5e9ca3476fc9c3e31c470457
[INFO] testing nikolads/fmi-parallel-dfs against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikolads%2Ffmi-parallel-dfs" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikolads/fmi-parallel-dfs on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nikolads/fmi-parallel-dfs
[INFO] finished tweaking git repo https://github.com/nikolads/fmi-parallel-dfs
[INFO] tweaked toml for git repo https://github.com/nikolads/fmi-parallel-dfs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/nikolads/fmi-parallel-dfs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c36d1150b18a320efcb303764c147a2ae75f5c5313767b58d739cfe6d27e757c
[INFO] running `"docker" "start" "-a" "c36d1150b18a320efcb303764c147a2ae75f5c5313767b58d739cfe6d27e757c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling spin v0.4.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.8
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling structopt-derive v0.2.13
[INFO] [stderr]    Compiling structopt v0.2.13
[INFO] [stderr]    Compiling parallel-dfs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.84s
[INFO] running `"docker" "inspect" "c36d1150b18a320efcb303764c147a2ae75f5c5313767b58d739cfe6d27e757c"`
[INFO] running `"docker" "rm" "-f" "c36d1150b18a320efcb303764c147a2ae75f5c5313767b58d739cfe6d27e757c"`
[INFO] [stdout] c36d1150b18a320efcb303764c147a2ae75f5c5313767b58d739cfe6d27e757c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 39c447619e72c679e8a4e8e60c434a78b1a57c43f2ada2b81fb6b8fac8366663
[INFO] running `"docker" "start" "-a" "39c447619e72c679e8a4e8e60c434a78b1a57c43f2ada2b81fb6b8fac8366663"`
[INFO] [stderr]    Compiling parallel-dfs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.42s
[INFO] running `"docker" "inspect" "39c447619e72c679e8a4e8e60c434a78b1a57c43f2ada2b81fb6b8fac8366663"`
[INFO] running `"docker" "rm" "-f" "39c447619e72c679e8a4e8e60c434a78b1a57c43f2ada2b81fb6b8fac8366663"`
[INFO] [stdout] 39c447619e72c679e8a4e8e60c434a78b1a57c43f2ada2b81fb6b8fac8366663
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b0c8d1d6b84901bb55e351b0243eb0b9e785f74196f90aca9a5a4e44e452eca9
[INFO] running `"docker" "start" "-a" "b0c8d1d6b84901bb55e351b0243eb0b9e785f74196f90aca9a5a4e44e452eca9"`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/parallel_dfs-2e76cf68f9bd5714
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stderr] thread '<unnamed>' panicked at 'attempted to leave type `nodrop::NoDrop<(epoch::Epoch, garbage::Bag)>` uninitialized, which is invalid', /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/mem/mod.rs:661:5
[INFO] [stderr] stack backtrace:
[INFO] [stdout] test utils::bit_vec::tests::ones ... ok
[INFO] [stdout] test utils::bit_vec::tests::ones_rev ... ok
[INFO] [stdout] test utils::bit_vec::tests::ones_rev_front_and_back ... ok
[INFO] [stdout] test utils::bit_vec::tests::ones_rev_offset ... ok
[INFO] [stdout] test utils::bit_vec::tests::test_bit_vec_remove ... ok
[INFO] [stdout] test utils::bit_vec::tests::ones_front_and_back ... ok
[INFO] [stdout] test utils::bit_vec::tests::ones_offset ... ok
[INFO] [stderr]    0:     0x5569fc99b274 - backtrace::backtrace::libunwind::trace::h61666fa4b9834a45
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stderr]    1:     0x5569fc99b274 - backtrace::backtrace::trace_unsynchronized::h01d3725fb5da8653
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5569fc99b274 - std::sys_common::backtrace::_print_fmt::h5c7c4751bc296f90
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x5569fc99b274 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7729313ad2d729c7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x5569fc9c404c - core::fmt::write::hb0049f6c12bdaffc
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1069
[INFO] [stderr]    5:     0x5569fc997c53 - std::io::Write::write_fmt::hfb486fa6ccb90f14
[INFO] [stderr]                                at src/libstd/io/mod.rs:1504
[INFO] [stderr]    6:     0x5569fc99db55 - std::sys_common::backtrace::_print::ha087cac92e84a414
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x5569fc99db55 - std::sys_common::backtrace::print::h6b013d3bfe6cbcb8
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x5569fc99db55 - std::panicking::default_hook::{{closure}}::h016d7de02def2736
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    9:     0x5569fc99d892 - std::panicking::default_hook::h9386f7e484840463
[INFO] [stderr]                                at src/libstd/panicking.rs:218
[INFO] [stderr]   10:     0x5569fc99e1b2 - std::panicking::rust_panic_with_hook::h3846eb1b2e5a9312
[INFO] [stderr]                                at src/libstd/panicking.rs:511
[INFO] [stderr]   11:     0x5569fc99dd9b - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:419
[INFO] [stderr]   12:     0x5569fc9c2a71 - core::panicking::panic_fmt::hc5953a7331f9805c
[INFO] [stderr]                                at src/libcore/panicking.rs:111
[INFO] [stderr]   13:     0x5569fc9c29bd - core::panicking::panic::hbfb03ddd2cbb509e
[INFO] [stderr]                                at src/libcore/panicking.rs:54
[INFO] [stderr]   14:     0x5569fc972128 - core::mem::uninitialized::hbb7d5d67931a6c11
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/mem/mod.rs:661
[INFO] [stderr]   15:     0x5569fc972128 - crossbeam_epoch::sync::queue::Queue<T>::new::h0edf42dd0aa31d68
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/sync/queue.rs:57
[INFO] [stderr]   16:     0x5569fc9696ae - crossbeam_epoch::internal::Global::new::h643ef6b072f66c6a
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/internal.rs:63
[INFO] [stderr]   17:     0x5569fc976e61 - crossbeam_epoch::collector::Collector::new::ha8b0726b8b2ed788
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/collector.rs:32
[INFO] [stderr]   18:     0x5569fc96d85a - <crossbeam_epoch::default::COLLECTOR as core::ops::deref::Deref>::deref::__static_ref_initialize::hb729b89efbbbeac4
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/default.rs:12
[INFO] [stderr]   19:     0x5569fc96d85a - core::ops::function::FnOnce::call_once::h4416c100efe04a31
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/ops/function.rs:232
[INFO] [stderr]   20:     0x5569fc974d17 - lazy_static::lazy::Lazy<T>::get::{{closure}}::h1fcbf18a378fba14
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.2.0/src/inline_lazy.rs:28
[INFO] [stderr]   21:     0x5569fc974e95 - std::sync::once::Once::call_once::{{closure}}::hf72fcf29a018c8ff
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/sync/once.rs:264
[INFO] [stderr]   22:     0x5569fc99a968 - std::sync::once::Once::call_inner::h645f0d07eb0a8066
[INFO] [stderr]                                at src/libstd/sync/once.rs:416
[INFO] [stderr]   23:     0x5569fc974e11 - std::sync::once::Once::call_once::ha8ef3bc93a0ecb70
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/sync/once.rs:264
[INFO] [stderr]   24:     0x5569fc9759d9 - lazy_static::lazy::Lazy<T>::get::h99fe1fe110e2e964
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.2.0/src/inline_lazy.rs:27
[INFO] [stderr]   25:     0x5569fc9759d9 - <crossbeam_epoch::default::COLLECTOR as core::ops::deref::Deref>::deref::__stability::h154a63ac43b92c36
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.2.0/src/lib.rs:139
[INFO] [stderr]   26:     0x5569fc9759d9 - <crossbeam_epoch::default::COLLECTOR as core::ops::deref::Deref>::deref::h9f5165ac8e90e261
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.2.0/src/lib.rs:141
[INFO] [stderr]   27:     0x5569fc975a54 - crossbeam_epoch::default::HANDLE::__init::h0cfc66193580aa76
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/default.rs:17
[INFO] [stderr]   28:     0x5569fc96d839 - core::ops::function::FnOnce::call_once::h2bd19cca8283389b
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/ops/function.rs:232
[INFO] [stderr]   29:     0x5569fc9765cc - std::thread::local::lazy::LazyKeyInner<T>::initialize::he3fa201ffd4d3fcd
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:289
[INFO] [stderr]   30:     0x5569fc974f32 - std::thread::local::fast::Key<T>::try_initialize::h7bf4458f3f31a02a
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:425
[INFO] [stderr]   31:     0x5569fc975087 - std::thread::local::fast::Key<T>::get::h87fc63d6023cf5e4
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:410
[INFO] [stderr]   32:     0x5569fc975a9d - crossbeam_epoch::default::HANDLE::__getit::h6795fd0c9e610c82
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:175
[INFO] [stderr]   33:     0x5569fc94b288 - std::thread::local::LocalKey<T>::try_with::h23c4622fd4496227
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:262
[INFO] [stderr]   34:     0x5569fc94b10f - std::thread::local::LocalKey<T>::with::h21764bf265a800ff
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/local.rs:239
[INFO] [stderr]   35:     0x5569fc960c7e - crossbeam_epoch::default::is_pinned::h6ee83c3e351fd475
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.3.1/src/default.rs:33
[INFO] [stderr]   36:     0x5569fc958e55 - crossbeam_deque::Stealer<T>::steal::hf9bb29767c9ce125
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-deque-0.2.0/src/lib.rs:714
[INFO] [stderr]   37:     0x5569fc9445aa - rayon_core::registry::Registry::pop_injected_job::hf8cf094b838d7f7f
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:313
[INFO] [stderr]   38:     0x5569fc94555c - rayon_core::registry::WorkerThread::wait_until_cold::{{closure}}::hef024df912b1f57d
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:566
[INFO] [stderr]   39:     0x5569fc96038f - core::option::Option<T>::or_else::h3c3ad33c8d45d38a
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/option.rs:766
[INFO] [stderr]   40:     0x5569fc9451a5 - rayon_core::registry::WorkerThread::wait_until_cold::haeeb8e778d05c030
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:564
[INFO] [stderr]   41:     0x5569fc944b83 - rayon_core::registry::WorkerThread::wait_until::h553a18236fe655f9
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:544
[INFO] [stderr]   42:     0x5569fc945d1b - rayon_core::registry::main_loop::h7c1f684d8369048c
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:666
[INFO] [stderr]   43:     0x5569fc943f2d - rayon_core::registry::Registry::new::{{closure}}::hc779f4d19b73b858
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rayon-core-1.4.1/src/registry.rs:135
[INFO] [stderr]   44:     0x5569fc95d911 - std::sys_common::backtrace::__rust_begin_short_backtrace::h413a355702865634
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/sys_common/backtrace.rs:130
[INFO] [stderr]   45:     0x5569fc954492 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hcda0f1f2f7f3b199
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/mod.rs:475
[INFO] [stderr]   46:     0x5569fc953842 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8873ea613d710416
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:318
[INFO] [stderr]   47:     0x5569fc9610cc - std::panicking::try::do_call::h6021c47ff9121c49
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:331
[INFO] [stderr]   48:     0x5569fc962a1d - __rust_try
[INFO] [stderr]   49:     0x5569fc960f53 - std::panicking::try::hdc14cc3756be6b0e
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:274
[INFO] [stderr]   50:     0x5569fc953a42 - std::panic::catch_unwind::hd16615d747dd7b62
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:394
[INFO] [stderr]   51:     0x5569fc954281 - std::thread::Builder::spawn_unchecked::{{closure}}::hd6ec20fff129d258
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/mod.rs:474
[INFO] [stderr]   52:     0x5569fc9545af - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9c214961d4c6dfaa
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/ops/function.rs:232
[INFO] [stderr]   53:     0x5569fc9915ef - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h7deaeeba480c6ce2
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/liballoc/boxed.rs:1008
[INFO] [stderr]   54:     0x5569fc9a4af3 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h968b1dfb87756523
[INFO] [stderr]                                at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/liballoc/boxed.rs:1008
[INFO] [stderr]   55:     0x5569fc9a4af3 - std::sys::unix::thread::Thread::new::thread_start::h2399addeb6370595
[INFO] [stderr]                                at src/libstd/sys/unix/thread.rs:87
[INFO] [stderr]   56:     0x7ff0536266db - start_thread
[INFO] [stderr]   57:     0x7ff05313788f - __clone
[INFO] [stderr]   58:                0x0 - <unknown>
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/parallel_dfs-2e76cf68f9bd5714` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `"docker" "inspect" "b0c8d1d6b84901bb55e351b0243eb0b9e785f74196f90aca9a5a4e44e452eca9"`
[INFO] running `"docker" "rm" "-f" "b0c8d1d6b84901bb55e351b0243eb0b9e785f74196f90aca9a5a4e44e452eca9"`
[INFO] [stdout] b0c8d1d6b84901bb55e351b0243eb0b9e785f74196f90aca9a5a4e44e452eca9