[INFO] cloning repository https://github.com/justinsorensen2/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/justinsorensen2/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinsorensen2%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinsorensen2%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e79b70e4128c94d3b2faf3b90d0a8015b79cc4b
[INFO] testing justinsorensen2/rustlings against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinsorensen2%2Frustlings" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/justinsorensen2/rustlings on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/justinsorensen2/rustlings
[INFO] finished tweaking git repo https://github.com/justinsorensen2/rustlings
[INFO] tweaked toml for git repo https://github.com/justinsorensen2/rustlings written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/justinsorensen2/rustlings 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" "+1.75.0" "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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c8548e1f7ce5da09c4ca12f6c5a5f2f3f498f07bfac678d0c10cc1e5c26837d
[INFO] running `Command { std: "docker" "start" "-a" "1c8548e1f7ce5da09c4ca12f6c5a5f2f3f498f07bfac678d0c10cc1e5c26837d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c8548e1f7ce5da09c4ca12f6c5a5f2f3f498f07bfac678d0c10cc1e5c26837d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c8548e1f7ce5da09c4ca12f6c5a5f2f3f498f07bfac678d0c10cc1e5c26837d", kill_on_drop: false }`
[INFO] [stdout] 1c8548e1f7ce5da09c4ca12f6c5a5f2f3f498f07bfac678d0c10cc1e5c26837d
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 150f48160cdef5b3772ddc408248c200a77e20e44194a34854c2d6b5217bfd56
[INFO] running `Command { std: "docker" "start" "-a" "150f48160cdef5b3772ddc408248c200a77e20e44194a34854c2d6b5217bfd56", kill_on_drop: false }`
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[INFO] [stderr]    Compiling inotify-sys v0.1.3
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[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling notify v4.0.15
[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 25.07s
[INFO] running `Command { std: "docker" "inspect" "150f48160cdef5b3772ddc408248c200a77e20e44194a34854c2d6b5217bfd56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "150f48160cdef5b3772ddc408248c200a77e20e44194a34854c2d6b5217bfd56", kill_on_drop: false }`
[INFO] [stdout] 150f48160cdef5b3772ddc408248c200a77e20e44194a34854c2d6b5217bfd56
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25d43a643f8fde069ff10bec8618c76029465ef85e9ad299f42a57b47759177d
[INFO] running `Command { std: "docker" "start" "-a" "25d43a643f8fde069ff10bec8618c76029465ef85e9ad299f42a57b47759177d", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling normalize-line-endings v0.2.2
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.0
[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 5.55s
[INFO] running `Command { std: "docker" "inspect" "25d43a643f8fde069ff10bec8618c76029465ef85e9ad299f42a57b47759177d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25d43a643f8fde069ff10bec8618c76029465ef85e9ad299f42a57b47759177d", kill_on_drop: false }`
[INFO] [stdout] 25d43a643f8fde069ff10bec8618c76029465ef85e9ad299f42a57b47759177d
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e20614b0dab4fa2eb6baafe0db10b7bdbf9d096168378cf96a9c6cbd2edf4583
[INFO] running `Command { std: "docker" "start" "-a" "e20614b0dab4fa2eb6baafe0db10b7bdbf9d096168378cf96a9c6cbd2edf4583", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-b5cfce45d6fd85d0)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[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 src/exercise.rs:219:36:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55e4be49897c - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x55e4be49897c - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55e4be49897c - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x55e4be49897c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55e4be4c26c0 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x55e4be4c26c0 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x55e4be49630f - std::io::Write::write_fmt::h040b369f3a0f9cbc
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stdout]    7:     0x55e4be498764 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55e4be498764 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55e4be49a427 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stdout]   10:     0x55e4be49a113 - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x55e4be3397d7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0ad024c9bdc6d768
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x55e4be3397d7 - test::test_main::{{closure}}::h7500b54257359db6
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x55e4be49aa38 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1f8f335eaa9cfaee
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x55e4be49aa38 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x55e4be49a78e - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:657:13
[INFO] [stdout]   16:     0x55e4be498e46 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x55e4be49a4f2 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x55e4be2f82c5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55e4be2f8853 - core::result::unwrap_failed::hddb4fea594200c52
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/result.rs:1653:5
[INFO] [stdout]   20:     0x55e4be2fa5bb - core::result::Result<T,E>::unwrap::h95d90987302e7e99
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55e4be2fd0f1 - rustlings::exercise::test::test_clean::h315ac260acf91676
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:219:9
[INFO] [stdout]   22:     0x55e4be2fd077 - rustlings::exercise::test::test_clean::{{closure}}::hc70a73c3ac0b0b1c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:218:20
[INFO] [stdout]   23:     0x55e4be2fea46 - core::ops::function::FnOnce::call_once::h464841af79fa77d3
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55e4be33ee2f - core::ops::function::FnOnce::call_once::h2b5d431d5046312d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55e4be33ee2f - test::__rust_begin_short_backtrace::h7714669af176e207
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:628:18
[INFO] [stdout]   26:     0x55e4be33de45 - test::run_test_in_process::{{closure}}::h85218797dcbcec12
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:60
[INFO] [stdout]   27:     0x55e4be33de45 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h76c106ea31c14d7b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55e4be33de45 - std::panicking::try::do_call::h3bd5d0f6620ee946
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   29:     0x55e4be33de45 - std::panicking::try::h232e535e4744fe31
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   30:     0x55e4be33de45 - std::panic::catch_unwind::h3ce3bd6ca8dbac68
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55e4be33de45 - test::run_test_in_process::hc97b257c9621286a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:27
[INFO] [stdout]   32:     0x55e4be33de45 - test::run_test::{{closure}}::h2aa798823a438d38
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:574:43
[INFO] [stdout]   33:     0x55e4be306106 - test::run_test::{{closure}}::h87d231c78fb59832
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:602:41
[INFO] [stdout]   34:     0x55e4be306106 - std::sys_common::backtrace::__rust_begin_short_backtrace::he6df152596625789
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   35:     0x55e4be30b1b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha94be15d1e0acf36
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   36:     0x55e4be30b1b7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9dc6bd6372f16606
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55e4be30b1b7 - std::panicking::try::do_call::h9057517f80303cd4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   38:     0x55e4be30b1b7 - std::panicking::try::he3a30b11ee45340c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   39:     0x55e4be30b1b7 - std::panic::catch_unwind::h410458cfd3528b8b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x55e4be30b1b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::h72ac3bdb567b737b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   41:     0x55e4be30b1b7 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h38f34da3654a8344
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55e4be49f665 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc7eafaff61e32df9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   43:     0x55e4be49f665 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6ba4a5de48dd2304
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   44:     0x55e4be49f665 - std::sys::unix::thread::Thread::new::thread_start::he469335aef763e45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f27c5394ac3 - <unknown>
[INFO] [stdout]   46:     0x7f27c5425bf4 - __clone
[INFO] [stdout]   47:                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; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "e20614b0dab4fa2eb6baafe0db10b7bdbf9d096168378cf96a9c6cbd2edf4583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e20614b0dab4fa2eb6baafe0db10b7bdbf9d096168378cf96a9c6cbd2edf4583", kill_on_drop: false }`
[INFO] [stdout] e20614b0dab4fa2eb6baafe0db10b7bdbf9d096168378cf96a9c6cbd2edf4583
[INFO] testing justinsorensen2/rustlings against beta-2023-12-22 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinsorensen2%2Frustlings" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (1183/1293)
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Updating files: 100% (1293/1293), done.
[INFO] validating manifest of git repo https://github.com/justinsorensen2/rustlings on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/justinsorensen2/rustlings
[INFO] finished tweaking git repo https://github.com/justinsorensen2/rustlings
[INFO] tweaked toml for git repo https://github.com/justinsorensen2/rustlings written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/justinsorensen2/rustlings 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" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09d4274728bdd49a6364cc21933e638c932d50ec7c95031aff9aa87c853871fe
[INFO] running `Command { std: "docker" "start" "-a" "09d4274728bdd49a6364cc21933e638c932d50ec7c95031aff9aa87c853871fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09d4274728bdd49a6364cc21933e638c932d50ec7c95031aff9aa87c853871fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d4274728bdd49a6364cc21933e638c932d50ec7c95031aff9aa87c853871fe", kill_on_drop: false }`
[INFO] [stdout] 09d4274728bdd49a6364cc21933e638c932d50ec7c95031aff9aa87c853871fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddf2bdaeb876372325be6d7c59bab17f61b999e588d53c99dfed10434bf8a51c
[INFO] running `Command { std: "docker" "start" "-a" "ddf2bdaeb876372325be6d7c59bab17f61b999e588d53c99dfed10434bf8a51c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling smallvec v0.6.9
[INFO] [stderr]    Compiling lock_api v0.2.0
[INFO] [stderr]    Compiling clicolors-control v1.0.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling termios v0.3.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling inotify v0.7.0
[INFO] [stderr]    Compiling filetime v0.2.5
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling notify v4.0.15
[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 24.00s
[INFO] running `Command { std: "docker" "inspect" "ddf2bdaeb876372325be6d7c59bab17f61b999e588d53c99dfed10434bf8a51c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddf2bdaeb876372325be6d7c59bab17f61b999e588d53c99dfed10434bf8a51c", kill_on_drop: false }`
[INFO] [stdout] ddf2bdaeb876372325be6d7c59bab17f61b999e588d53c99dfed10434bf8a51c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a544fb511c86374b9044a65a7afa0adf90a73d67caa53cbfe692b1e9fed6c0ba
[INFO] running `Command { std: "docker" "start" "-a" "a544fb511c86374b9044a65a7afa0adf90a73d67caa53cbfe692b1e9fed6c0ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling normalize-line-endings v0.2.2
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.0
[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 5.32s
[INFO] running `Command { std: "docker" "inspect" "a544fb511c86374b9044a65a7afa0adf90a73d67caa53cbfe692b1e9fed6c0ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a544fb511c86374b9044a65a7afa0adf90a73d67caa53cbfe692b1e9fed6c0ba", kill_on_drop: false }`
[INFO] [stdout] a544fb511c86374b9044a65a7afa0adf90a73d67caa53cbfe692b1e9fed6c0ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 76946d136e56acee9cdf32171202f7d48675665601f4ea3120428b6613629e7a
[INFO] running `Command { std: "docker" "start" "-a" "76946d136e56acee9cdf32171202f7d48675665601f4ea3120428b6613629e7a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-a650561e192cda17)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[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 src/exercise.rs:219:36:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x557f833d06e6 - std::backtrace_rs::backtrace::libunwind::trace::h261606ad26a499c1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x557f833d06e6 - std::backtrace_rs::backtrace::trace_unsynchronized::hd183f0625477fb28
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x557f833d06e6 - std::sys_common::backtrace::_print_fmt::hd7f8fef21b4eda67
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x557f833d06e6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h623d9b51f2f453f1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x557f833f9720 - core::fmt::rt::Argument::fmt::h9f417ac76a86f368
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x557f833f9720 - core::fmt::write::hc9b6faf4ac2aeff7
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x557f833ce12f - std::io::Write::write_fmt::he04625a3a989fec3
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/io/mod.rs:1810:15
[INFO] [stdout]    7:     0x557f833d04c4 - std::sys_common::backtrace::_print::hd5d66399c7df88a2
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x557f833d04c4 - std::sys_common::backtrace::print::he81ed2da642d37e5
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x557f833d2237 - std::panicking::default_hook::{{closure}}::h85773f4fa117163d
[INFO] [stdout]   10:     0x557f833d1f1d - std::panicking::default_hook::h6a1694a91d09b278
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x557f8326d207 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h616ac37fa3cd6c8f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   12:     0x557f8326d207 - test::test_main::{{closure}}::h00d84697cefdcbb6
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x557f833d2856 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcb3fe3b9bb537ba8
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   14:     0x557f833d2856 - std::panicking::rust_panic_with_hook::h0a7ad96e90f7145b
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x557f833d25a2 - std::panicking::begin_panic_handler::{{closure}}::h7919090525c6485e
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:657:13
[INFO] [stdout]   16:     0x557f833d0be6 - std::sys_common::backtrace::__rust_end_short_backtrace::hf3289479464f7dfe
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x557f833d2300 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x557f8322e2a5 - core::panicking::panic_fmt::hcc9f77c5c132af55
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x557f8322e843 - core::result::unwrap_failed::hbe14f498be1452f9
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/result.rs:1649:5
[INFO] [stdout]   20:     0x557f832301eb - core::result::Result<T,E>::unwrap::h69aeef2a9a30147e
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/result.rs:1073:23
[INFO] [stdout]   21:     0x557f83237d41 - rustlings::exercise::test::test_clean::h5d5b8469dbd0d6f4
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:219:9
[INFO] [stdout]   22:     0x557f83237cc7 - rustlings::exercise::test::test_clean::{{closure}}::hb17e57c424d097c7
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:218:20
[INFO] [stdout]   23:     0x557f83235856 - core::ops::function::FnOnce::call_once::hc40d2e6020f290bd
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x557f83272adf - core::ops::function::FnOnce::call_once::hd64d26f405258157
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x557f83272adf - test::__rust_begin_short_backtrace::he21b0b7a6d731bf9
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:627:18
[INFO] [stdout]   26:     0x557f83271861 - test::run_test_in_process::{{closure}}::hf5c73986d7bdfde2
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:650:60
[INFO] [stdout]   27:     0x557f83271861 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h330011ad032aadc0
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x557f83271861 - std::panicking::try::do_call::he61b0a958b795a41
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stdout]   29:     0x557f83271861 - std::panicking::try::h7309da130f906eb7
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stdout]   30:     0x557f83271861 - std::panic::catch_unwind::hc5c3a06fdaf0a92a
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x557f83271861 - test::run_test_in_process::h7e7b7c71c3324e0f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:650:27
[INFO] [stdout]   32:     0x557f83271861 - test::run_test::{{closure}}::h1f509f28f5cf20b1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:573:43
[INFO] [stdout]   33:     0x557f83238b96 - test::run_test::{{closure}}::h1754218abf443f6d
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:601:41
[INFO] [stdout]   34:     0x557f83238b96 - std::sys_common::backtrace::__rust_begin_short_backtrace::h2ee174b9d5954948
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x557f8323dbf7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hf60bee9c1a17ef09
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   36:     0x557f8323dbf7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h33d0dddec5216160
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x557f8323dbf7 - std::panicking::try::do_call::h144b3048b546f835
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stdout]   38:     0x557f8323dbf7 - std::panicking::try::h978244d04646189f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stdout]   39:     0x557f8323dbf7 - std::panic::catch_unwind::hdf436369d188fe86
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x557f8323dbf7 - std::thread::Builder::spawn_unchecked_::{{closure}}::h87329cbdd33c79ec
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   41:     0x557f8323dbf7 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h401abbe67897d450
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x557f833d7495 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5d7c8f150ab9c84c
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   43:     0x557f833d7495 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h570d5b005c242c15
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   44:     0x557f833d7495 - std::sys::unix::thread::Thread::new::thread_start::h36b0a20c0b2361ad
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7fe73808cac3 - <unknown>
[INFO] [stdout]   46:     0x7fe73811dbf4 - __clone
[INFO] [stdout]   47:                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; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "76946d136e56acee9cdf32171202f7d48675665601f4ea3120428b6613629e7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76946d136e56acee9cdf32171202f7d48675665601f4ea3120428b6613629e7a", kill_on_drop: false }`
[INFO] [stdout] 76946d136e56acee9cdf32171202f7d48675665601f4ea3120428b6613629e7a
