[INFO] cloning repository https://github.com/DrFeederino/rustlings-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DrFeederino/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrFeederino%2Frustlings-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrFeederino%2Frustlings-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d131e8a711fbe1057002c8566aaf13ef94d3bfa7
[INFO] testing DrFeederino/rustlings-solutions against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrFeederino%2Frustlings-solutions" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DrFeederino/rustlings-solutions on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DrFeederino/rustlings-solutions
[INFO] finished tweaking git repo https://github.com/DrFeederino/rustlings-solutions
[INFO] tweaked toml for git repo https://github.com/DrFeederino/rustlings-solutions written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/DrFeederino/rustlings-solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dee8e51e85f883fc348fde939e352480caa1caa41d430586cf25abe3ed2c10cd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dee8e51e85f883fc348fde939e352480caa1caa41d430586cf25abe3ed2c10cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dee8e51e85f883fc348fde939e352480caa1caa41d430586cf25abe3ed2c10cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dee8e51e85f883fc348fde939e352480caa1caa41d430586cf25abe3ed2c10cd", kill_on_drop: false }`
[INFO] [stdout] dee8e51e85f883fc348fde939e352480caa1caa41d430586cf25abe3ed2c10cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad29233bdf1c58d9eb43b6123c79b044f107106e3e2edad09258ba839392fef6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ad29233bdf1c58d9eb43b6123c79b044f107106e3e2edad09258ba839392fef6", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling smallvec v0.6.9
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling lock_api v0.2.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling clicolors-control v1.0.0
[INFO] [stderr]    Compiling termios v0.3.1
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling filetime v0.2.5
[INFO] [stderr]    Compiling inotify v0.7.0
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling notify v4.0.15
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling console v0.8.0
[INFO] [stderr]    Compiling console v0.7.7
[INFO] [stderr]    Compiling indicatif v0.10.3
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rustlings v3.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 13s
[INFO] running `Command { std: "docker" "inspect" "ad29233bdf1c58d9eb43b6123c79b044f107106e3e2edad09258ba839392fef6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad29233bdf1c58d9eb43b6123c79b044f107106e3e2edad09258ba839392fef6", kill_on_drop: false }`
[INFO] [stdout] ad29233bdf1c58d9eb43b6123c79b044f107106e3e2edad09258ba839392fef6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b754e504fc476413e5208133a2812d9116ca45a959a78e7812782d5dd556c6f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1b754e504fc476413e5208133a2812d9116ca45a959a78e7812782d5dd556c6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling normalize-line-endings v0.2.2
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling predicates v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v3.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 17.40s
[INFO] running `Command { std: "docker" "inspect" "1b754e504fc476413e5208133a2812d9116ca45a959a78e7812782d5dd556c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b754e504fc476413e5208133a2812d9116ca45a959a78e7812782d5dd556c6f", kill_on_drop: false }`
[INFO] [stdout] 1b754e504fc476413e5208133a2812d9116ca45a959a78e7812782d5dd556c6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40110aebccfa240f03b41903cad0d8538a2b880d189cc3cd8b0096f4556f47e5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "40110aebccfa240f03b41903cad0d8538a2b880d189cc3cd8b0096f4556f47e5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rustlings-1e1de6ee57458b35
[INFO] [stdout] running 3 tests
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stderr] error: test failed, to rerun pass '--bin rustlings'
[INFO] [stdout] test exercise::test::test_clean ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/exercise.rs:219:36
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55a0e4f75200 - std::backtrace_rs::backtrace::libunwind::trace::h577ea05e9ca4629a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stdout]    1:     0x55a0e4f75200 - std::backtrace_rs::backtrace::trace_unsynchronized::h50b9b72b84c7dd56
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x55a0e4f75200 - std::sys_common::backtrace::_print_fmt::h6541cf9823837fac
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:79
[INFO] [stdout]    3:     0x55a0e4f75200 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf64fbff071026df5
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:58
[INFO] [stdout]    4:     0x55a0e4f986dc - core::fmt::write::h9ddafa4860d8adff
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/fmt/mod.rs:1082
[INFO] [stdout]    5:     0x55a0e4d92785 - std::io::Write::write_fmt::h50a71e2460ce07da
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/mod.rs:1514
[INFO] [stdout]    6:     0x55a0e4f6fcd1 - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::h9bbd3fed8160d0d2
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/impls.rs:176
[INFO] [stdout]    7:     0x55a0e4f77680 - std::sys_common::backtrace::_print::ha25f9ff5080d886d
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:61
[INFO] [stdout]    8:     0x55a0e4f77680 - std::sys_common::backtrace::print::h213e8aa8dc5405c0
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:48
[INFO] [stdout]    9:     0x55a0e4f77680 - std::panicking::default_hook::{{closure}}::h6482fae49ef9d963
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:200
[INFO] [stdout]   10:     0x55a0e4f77376 - std::panicking::default_hook::he30ad7589e0970f9
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:216
[INFO] [stdout]   11:     0x55a0e4f77ce3 - std::panicking::rust_panic_with_hook::haa1ed36ada4ffb03
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:569
[INFO] [stdout]   12:     0x55a0e4f778b9 - std::panicking::begin_panic_handler::{{closure}}::h7001af1bb21aeaeb
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:476
[INFO] [stdout]   13:     0x55a0e4f7568c - std::sys_common::backtrace::__rust_end_short_backtrace::h39910f557f5f2367
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:153
[INFO] [stdout]   14:     0x55a0e4f77879 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:475
[INFO] [stdout]   15:     0x55a0e4f96f91 - core::panicking::panic_fmt::h4e2659771ebc78eb
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/panicking.rs:85
[INFO] [stdout]   16:     0x55a0e4f96db3 - core::option::expect_none_failed::h448b58a024c2c33a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/option.rs:1221
[INFO] [stdout]   17:     0x55a0e4d8e05b - core::result::Result<T,E>::unwrap::h923f4c7efa259c40
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/result.rs:973
[INFO] [stdout]   18:     0x55a0e4d8c914 - rustlings::exercise::test::test_clean::h17796bdfe839ae7d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:219
[INFO] [stdout]   19:     0x55a0e4d8c8ba - rustlings::exercise::test::test_clean::{{closure}}::hcb6d0a046ca86083
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:218
[INFO] [stdout]   20:     0x55a0e4d82a3e - core::ops::function::FnOnce::call_once::hcab6f28b72ad4d8c
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   21:     0x55a0e4dbb063 - core::ops::function::FnOnce::call_once::hd04d57b5cf16f85a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   22:     0x55a0e4dbb063 - test::__rust_begin_short_backtrace::hd8e9a8c5a2e43388
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:517
[INFO] [stdout]   23:     0x55a0e4db9533 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h3c3db8a500c1a19a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   24:     0x55a0e4db9533 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h043e9ebcbe360c80
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:308
[INFO] [stdout]   25:     0x55a0e4db9533 - std::panicking::try::do_call::h47c2fb275506c2e8
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stdout]   26:     0x55a0e4db9533 - std::panicking::try::h569c20f0e99453b4
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stdout]   27:     0x55a0e4db9533 - std::panic::catch_unwind::hb33c6d0f01540d23
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stdout]   28:     0x55a0e4db9533 - test::run_test_in_process::hc0ce562d167e51cf
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:544
[INFO] [stdout]   29:     0x55a0e4db9533 - test::run_test::run_test_inner::{{closure}}::hd3120982fcd71544
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:450
[INFO] [stdout]   30:     0x55a0e4d91bb6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h84f8bc12cc4cdac6
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:137
[INFO] [stdout]   31:     0x55a0e4d96de5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hb8b5fa0ba425d4db
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/thread/mod.rs:458
[INFO] [stdout]   32:     0x55a0e4d96de5 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc4b84b244cf55f75
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:308
[INFO] [stdout]   33:     0x55a0e4d96de5 - std::panicking::try::do_call::ha31922ad8fa17753
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stdout]   34:     0x55a0e4d96de5 - std::panicking::try::h38a6da203722ae6e
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stdout]   35:     0x55a0e4d96de5 - std::panic::catch_unwind::h83afce167c9062b9
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stdout]   36:     0x55a0e4d96de5 - std::thread::Builder::spawn_unchecked::{{closure}}::h160689155590a70c
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/thread/mod.rs:457
[INFO] [stdout]   37:     0x55a0e4d96de5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7dbf17a455132a46
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   38:     0x55a0e4f7e6aa - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h670c50864ac2cb92
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   39:     0x55a0e4f7e6aa - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h2511952749086d81
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   40:     0x55a0e4f7e6aa - std::sys::unix::thread::Thread::new::thread_start::h5ad4ddffe24373a8
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys/unix/thread.rs:87
[INFO] [stdout]   41:     0x7f821449f609 - start_thread
[INFO] [stdout]   42:     0x7f82145e1103 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40110aebccfa240f03b41903cad0d8538a2b880d189cc3cd8b0096f4556f47e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40110aebccfa240f03b41903cad0d8538a2b880d189cc3cd8b0096f4556f47e5", kill_on_drop: false }`
[INFO] [stdout] 40110aebccfa240f03b41903cad0d8538a2b880d189cc3cd8b0096f4556f47e5
