[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-nkbai
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/learn_rust_rustlings-nkbai" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-nkbai", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-nkbai'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49a8ba43c08edded1ebf0e387949a870bb5145d2
[INFO] testing LearningOS/learn_rust_rustlings-nkbai against beta-2025-04-13 for beta-1.87-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-nkbai" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-nkbai on toolchain beta-2025-04-13
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-04-13" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-nkbai
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-nkbai
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-nkbai written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-nkbai 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-2025-04-13" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2dd27170a4368a786893cc49b13112a5d6d699de1d03212d0fd9e93a30ce8dd2
[INFO] running `Command { std: "docker" "start" "-a" "2dd27170a4368a786893cc49b13112a5d6d699de1d03212d0fd9e93a30ce8dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2dd27170a4368a786893cc49b13112a5d6d699de1d03212d0fd9e93a30ce8dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dd27170a4368a786893cc49b13112a5d6d699de1d03212d0fd9e93a30ce8dd2", kill_on_drop: false }`
[INFO] [stdout] 2dd27170a4368a786893cc49b13112a5d6d699de1d03212d0fd9e93a30ce8dd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1187784f142328eba2924a0587c3afd5ee00b61c849b499826a6300a1a9ee7bb
[INFO] running `Command { std: "docker" "start" "-a" "1187784f142328eba2924a0587c3afd5ee00b61c849b499826a6300a1a9ee7bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling once_cell v1.10.0
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[INFO] [stderr]    Compiling itoa v1.0.2
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[INFO] [stderr]    Compiling home v0.5.3
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[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh_derive v0.1.5
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[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.08s
[INFO] running `Command { std: "docker" "inspect" "1187784f142328eba2924a0587c3afd5ee00b61c849b499826a6300a1a9ee7bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1187784f142328eba2924a0587c3afd5ee00b61c849b499826a6300a1a9ee7bb", kill_on_drop: false }`
[INFO] [stdout] 1187784f142328eba2924a0587c3afd5ee00b61c849b499826a6300a1a9ee7bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0adad4e79c7be8435cc3ab7baa1e63b50f4c74eb65aec905c002c6563ab27eb9
[INFO] running `Command { std: "docker" "start" "-a" "0adad4e79c7be8435cc3ab7baa1e63b50f4c74eb65aec905c002c6563ab27eb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling predicates v1.0.8
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.14s
[INFO] running `Command { std: "docker" "inspect" "0adad4e79c7be8435cc3ab7baa1e63b50f4c74eb65aec905c002c6563ab27eb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0adad4e79c7be8435cc3ab7baa1e63b50f4c74eb65aec905c002c6563ab27eb9", kill_on_drop: false }`
[INFO] [stdout] 0adad4e79c7be8435cc3ab7baa1e63b50f4c74eb65aec905c002c6563ab27eb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 39358a1396d77fb764a3e96156e7cbd29641eb056bccbe9b2c65cb9176c5d294
[INFO] running `Command { std: "docker" "start" "-a" "39358a1396d77fb764a3e96156e7cbd29641eb056bccbe9b2c65cb9176c5d294", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustlings-f38ab5ff54c19f0b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-56a6530f0db8ea12)
[INFO] [stdout] 
[INFO] [stdout] running 4 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] test exercise::test::test_exercise_with_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs:269:36:
[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:     0x57ad5d025d22 - std::backtrace_rs::backtrace::libunwind::trace::h97da83aab53f337d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x57ad5d025d22 - std::backtrace_rs::backtrace::trace_unsynchronized::h07d9fad959b0b0c4
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x57ad5d025d22 - std::sys::backtrace::_print_fmt::h73b6844d523a91e6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x57ad5d025d22 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::had50d3dbab4f9a49
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x57ad5d04bf83 - core::fmt::rt::Argument::fmt::h96dc2668ac588484
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/rt.rs:184:76
[INFO] [stdout]    5:     0x57ad5d04bf83 - core::fmt::write::h3c068850dd3fcd11
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/mod.rs:1480:21
[INFO] [stdout]    6:     0x57ad5d0233e3 - std::io::default_write_fmt::h9f5cac5e26eafb82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x57ad5d0233e3 - std::io::Write::write_fmt::h9be88ac981c80255
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x57ad5d025b72 - std::sys::backtrace::BacktraceLock::print::h160d33c700b1accf
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x57ad5d02710c - std::panicking::default_hook::{{closure}}::hdccf862335980e92
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x57ad5d026f62 - std::panicking::default_hook::h92ea296b4f4c5d78
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x57ad5cec1614 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h58e2cb0c3aa8f900
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   12:     0x57ad5cec1614 - test::test_main::{{closure}}::h068e739b3ff3ace9
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x57ad5d027b83 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4dc3b8e0d98a0945
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   14:     0x57ad5d027b83 - std::panicking::rust_panic_with_hook::h53eb519a340d7090
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x57ad5d02785a - std::panicking::begin_panic_handler::{{closure}}::h1b012222d781940d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x57ad5d026219 - std::sys::backtrace::__rust_end_short_backtrace::hb1c00a6a74936045
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x57ad5d0274ed - __rustc[3fad54a3e94379e3]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x57ad5ce786f0 - core::panicking::panic_fmt::h5646b0c12be1dead
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x57ad5ce78b86 - core::result::unwrap_failed::hc06d646aff6e2a9a
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1704:5
[INFO] [stdout]   20:     0x57ad5ce823ec - core::result::Result<T,E>::unwrap::h426785eb738e460b
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1109:23
[INFO] [stdout]   21:     0x57ad5ce823ec - rustlings::exercise::test::test_clean::he884730473c7e643
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   22:     0x57ad5ce82327 - rustlings::exercise::test::test_clean::{{closure}}::haf3639ce4eefd0c3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   23:     0x57ad5ce7a3d6 - core::ops::function::FnOnce::call_once::h944707f870761342
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x57ad5cec6f6b - core::ops::function::FnOnce::call_once::h36fc4a9de3ab6dc6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x57ad5cec6f6b - test::__rust_begin_short_backtrace::ha0a98bb69b358a31
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:638:18
[INFO] [stdout]   26:     0x57ad5cec5f5f - test::run_test_in_process::{{closure}}::h8c178d13fba0a588
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:60
[INFO] [stdout]   27:     0x57ad5cec5f5f - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hcf9a13e44c998160
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x57ad5cec5f5f - std::panicking::try::do_call::h4af5be696220e430
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x57ad5cec5f5f - std::panicking::try::hbf49a526ff439d5e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x57ad5cec5f5f - std::panic::catch_unwind::h73db1b343ad1c705
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x57ad5cec5f5f - test::run_test_in_process::hef059ed743ea6437
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:27
[INFO] [stdout]   32:     0x57ad5cec5f5f - test::run_test::{{closure}}::h9508bce7fbf1ad82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:582:43
[INFO] [stdout]   33:     0x57ad5ce8a6b4 - test::run_test::{{closure}}::h70f94fa995999514
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:612:41
[INFO] [stdout]   34:     0x57ad5ce8a6b4 - std::sys::backtrace::__rust_begin_short_backtrace::hfc7043e7c8324aca
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x57ad5ce8dfaa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h599c966db81290c0
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x57ad5ce8dfaa - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h499078bec004bb56
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x57ad5ce8dfaa - std::panicking::try::do_call::h336d5bb945571c50
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x57ad5ce8dfaa - std::panicking::try::hea8a9a2c11807957
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x57ad5ce8dfaa - std::panic::catch_unwind::hc46631a6d929f68d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x57ad5ce8dfaa - std::thread::Builder::spawn_unchecked_::{{closure}}::he5729da5506c58d1
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x57ad5ce8dfaa - core::ops::function::FnOnce::call_once{{vtable.shim}}::h8b7f1215a4f7e46f
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x57ad5d0298db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5e2c5a5b1d7d1d9c
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   43:     0x57ad5d0298db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc50cd23acd01680e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   44:     0x57ad5d0298db - std::sys::pal::unix::thread::Thread::new::thread_start::hb3d0e19f380baa62
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/pal/unix/thread.rs:109:17
[INFO] [stdout]   45:     0x7bcf04230aa4 - <unknown>
[INFO] [stdout]   46:     0x7bcf042bda34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs:342:38:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetaipQxGC\"\u{1b}[0m\n\n\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: aborting due to 1 previous error\u{1b}[0m\n\n" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x57ad5d025d22 - std::backtrace_rs::backtrace::libunwind::trace::h97da83aab53f337d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x57ad5d025d22 - std::backtrace_rs::backtrace::trace_unsynchronized::h07d9fad959b0b0c4
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x57ad5d025d22 - std::sys::backtrace::_print_fmt::h73b6844d523a91e6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x57ad5d025d22 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::had50d3dbab4f9a49
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x57ad5d04bf83 - core::fmt::rt::Argument::fmt::h96dc2668ac588484
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/rt.rs:184:76
[INFO] [stdout]    5:     0x57ad5d04bf83 - core::fmt::write::h3c068850dd3fcd11
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/mod.rs:1480:21
[INFO] [stdout]    6:     0x57ad5d0233e3 - std::io::default_write_fmt::h9f5cac5e26eafb82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x57ad5d0233e3 - std::io::Write::write_fmt::h9be88ac981c80255
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x57ad5d025b72 - std::sys::backtrace::BacktraceLock::print::h160d33c700b1accf
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x57ad5d02710c - std::panicking::default_hook::{{closure}}::hdccf862335980e92
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x57ad5d026f62 - std::panicking::default_hook::h92ea296b4f4c5d78
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x57ad5cec1614 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h58e2cb0c3aa8f900
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   12:     0x57ad5cec1614 - test::test_main::{{closure}}::h068e739b3ff3ace9
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x57ad5d027b83 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4dc3b8e0d98a0945
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   14:     0x57ad5d027b83 - std::panicking::rust_panic_with_hook::h53eb519a340d7090
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x57ad5d02785a - std::panicking::begin_panic_handler::{{closure}}::h1b012222d781940d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x57ad5d026219 - std::sys::backtrace::__rust_end_short_backtrace::hb1c00a6a74936045
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x57ad5d0274ed - __rustc[3fad54a3e94379e3]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x57ad5ce786f0 - core::panicking::panic_fmt::h5646b0c12be1dead
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x57ad5ce78b86 - core::result::unwrap_failed::hc06d646aff6e2a9a
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1704:5
[INFO] [stdout]   20:     0x57ad5ce83286 - core::result::Result<T,E>::unwrap::h711f7c3339df706f
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1109:23
[INFO] [stdout]   21:     0x57ad5ce83286 - rustlings::exercise::test::test_exercise_with_output::h711216c36e43c784
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   22:     0x57ad5ce83087 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hbeed907be82e3df7
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   23:     0x57ad5ce7a426 - core::ops::function::FnOnce::call_once::heb487c5b96bc32a8
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x57ad5cec6f6b - core::ops::function::FnOnce::call_once::h36fc4a9de3ab6dc6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x57ad5cec6f6b - test::__rust_begin_short_backtrace::ha0a98bb69b358a31
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:638:18
[INFO] [stdout]   26:     0x57ad5cec5f5f - test::run_test_in_process::{{closure}}::h8c178d13fba0a588
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:60
[INFO] [stdout]   27:     0x57ad5cec5f5f - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hcf9a13e44c998160
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x57ad5cec5f5f - std::panicking::try::do_call::h4af5be696220e430
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x57ad5cec5f5f - std::panicking::try::hbf49a526ff439d5e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x57ad5cec5f5f - std::panic::catch_unwind::h73db1b343ad1c705
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x57ad5cec5f5f - test::run_test_in_process::hef059ed743ea6437
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:27
[INFO] [stdout]   32:     0x57ad5cec5f5f - test::run_test::{{closure}}::h9508bce7fbf1ad82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:582:43
[INFO] [stdout]   33:     0x57ad5ce8a6b4 - test::run_test::{{closure}}::h70f94fa995999514
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:612:41
[INFO] [stdout]   34:     0x57ad5ce8a6b4 - std::sys::backtrace::__rust_begin_short_backtrace::hfc7043e7c8324aca
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x57ad5ce8dfaa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h599c966db81290c0
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x57ad5ce8dfaa - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h499078bec004bb56
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x57ad5ce8dfaa - std::panicking::try::do_call::h336d5bb945571c50
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x57ad5ce8dfaa - std::panicking::try::hea8a9a2c11807957
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x57ad5ce8dfaa - std::panic::catch_unwind::hc46631a6d929f68d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x57ad5ce8dfaa - std::thread::Builder::spawn_unchecked_::{{closure}}::he5729da5506c58d1
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x57ad5ce8dfaa - core::ops::function::FnOnce::call_once{{vtable.shim}}::h8b7f1215a4f7e46f
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x57ad5d0298db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5e2c5a5b1d7d1d9c
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   43:     0x57ad5d0298db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc50cd23acd01680e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   44:     0x57ad5d0298db - std::sys::pal::unix::thread::Thread::new::thread_start::hb3d0e19f380baa62
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/pal/unix/thread.rs:109:17
[INFO] [stdout]   45:     0x7bcf04230aa4 - <unknown>
[INFO] [stdout]   46:     0x7bcf042bda34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout]     exercise::test::test_exercise_with_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.17s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "39358a1396d77fb764a3e96156e7cbd29641eb056bccbe9b2c65cb9176c5d294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39358a1396d77fb764a3e96156e7cbd29641eb056bccbe9b2c65cb9176c5d294", kill_on_drop: false }`
[INFO] [stdout] 39358a1396d77fb764a3e96156e7cbd29641eb056bccbe9b2c65cb9176c5d294