[INFO] cloning repository https://github.com/LearningOS/rust-rustlings-zhanglin20231001
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/rust-rustlings-zhanglin20231001" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-zhanglin20231001", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-zhanglin20231001'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce7ee732c74c37671d2a3dd9e7704736ead278a2
[INFO] testing LearningOS/rust-rustlings-zhanglin20231001/ce7ee732c74c37671d2a3dd9e7704736ead278a2 against try#f23b22458132fb20faeb8a915b1c252478696f25 for pr-131095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-zhanglin20231001" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 on toolchain f23b22458132fb20faeb8a915b1c252478696f25
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001
[INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001
[INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 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" "+f23b22458132fb20faeb8a915b1c252478696f25" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing LearningOS/rust-rustlings-zhanglin20231001/ce7ee732c74c37671d2a3dd9e7704736ead278a2 against try#f23b22458132fb20faeb8a915b1c252478696f25 for pr-131095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-zhanglin20231001" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 on toolchain f23b22458132fb20faeb8a915b1c252478696f25
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001
[INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001
[INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/rust-rustlings-zhanglin20231001 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" "+f23b22458132fb20faeb8a915b1c252478696f25" "fetch" "--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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47d9579368ef190083b7ce7475a9ac2e1d5b7c6d8a8c146556b1e7b9e840e237
[INFO] running `Command { std: "docker" "start" "-a" "47d9579368ef190083b7ce7475a9ac2e1d5b7c6d8a8c146556b1e7b9e840e237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47d9579368ef190083b7ce7475a9ac2e1d5b7c6d8a8c146556b1e7b9e840e237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d9579368ef190083b7ce7475a9ac2e1d5b7c6d8a8c146556b1e7b9e840e237", kill_on_drop: false }`
[INFO] [stdout] 47d9579368ef190083b7ce7475a9ac2e1d5b7c6d8a8c146556b1e7b9e840e237
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58c8050255cb78c2c84c536e27b5624f0d1e265937c6547a7beab8289621b90f
[INFO] running `Command { std: "docker" "start" "-a" "58c8050255cb78c2c84c536e27b5624f0d1e265937c6547a7beab8289621b90f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlings v5.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "58c8050255cb78c2c84c536e27b5624f0d1e265937c6547a7beab8289621b90f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58c8050255cb78c2c84c536e27b5624f0d1e265937c6547a7beab8289621b90f", kill_on_drop: false }`
[INFO] [stdout] 58c8050255cb78c2c84c536e27b5624f0d1e265937c6547a7beab8289621b90f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e52e39b7f9bb83bd825f9e2fe658c4b4c2597eaffb2d2430c58307329f330c7e
[INFO] running `Command { std: "docker" "start" "-a" "e52e39b7f9bb83bd825f9e2fe658c4b4c2597eaffb2d2430c58307329f330c7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlings v5.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "e52e39b7f9bb83bd825f9e2fe658c4b4c2597eaffb2d2430c58307329f330c7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52e39b7f9bb83bd825f9e2fe658c4b4c2597eaffb2d2430c58307329f330c7e", kill_on_drop: false }`
[INFO] [stdout] e52e39b7f9bb83bd825f9e2fe658c4b4c2597eaffb2d2430c58307329f330c7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d51912f836241196e6641af33edea85906d1eeda527a15d0b3499e2f4c8dcf4f
[INFO] running `Command { std: "docker" "start" "-a" "d51912f836241196e6641af33edea85906d1eeda527a15d0b3499e2f4c8dcf4f", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-0da0eebcf6579f30)
[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] 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:     0x5d6f8184271a - std::backtrace_rs::backtrace::libunwind::trace::h24270b8ca84976f5
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x5d6f8184271a - std::backtrace_rs::backtrace::trace_unsynchronized::h02001f29f8a7f873
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5d6f8184271a - std::sys::backtrace::_print_fmt::hec0fad1ff9d0ced9
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5d6f8184271a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h64292488f7f2250f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5d6f818693a3 - core::fmt::rt::Argument::fmt::h5a186eb42f172f83
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x5d6f818693a3 - core::fmt::write::h481de9317912dd10
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/fmt/mod.rs:1186:21
[INFO] [stdout]    6:     0x5d6f8183f353 - std::io::Write::write_fmt::hf3775693c09b4454
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/io/mod.rs:1839:15
[INFO] [stdout]    7:     0x5d6f81842562 - std::sys::backtrace::BacktraceLock::print::h8adcaf0142651003
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5d6f81843bc5 - std::panicking::default_hook::{{closure}}::h15fb66ff6c6741f9
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x5d6f818439b8 - std::panicking::default_hook::hb9ad284307d8f928
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x5d6f816da639 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7b6ff508218c42a0
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   11:     0x5d6f816da639 - test::test_main::{{closure}}::hbc464be6eb0d2a52
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:133:21
[INFO] [stdout]   12:     0x5d6f818442c8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4be8ec3e201e2cf3
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   13:     0x5d6f818442c8 - std::panicking::rust_panic_with_hook::h66f68b895f94d79f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x5d6f8184408a - std::panicking::begin_panic_handler::{{closure}}::hca74b9b22568e264
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x5d6f81842bf9 - std::sys::backtrace::__rust_end_short_backtrace::h74dd0769b8a109e0
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x5d6f81843d1c - rust_begin_unwind
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x5d6f81867d60 - core::panicking::panic_fmt::h9d563f5dc1b01cab
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panicking.rs:74:14
[INFO] [stdout]   18:     0x5d6f818681e6 - core::result::unwrap_failed::he99f077262f32dcd
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/result.rs:1695:5
[INFO] [stdout]   19:     0x5d6f8169540a - core::result::Result<T,E>::unwrap::hf7ad77e421be8a04
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/result.rs:1103:23
[INFO] [stdout]   20:     0x5d6f8169540a - rustlings::exercise::test::test_clean::h8b72c4d8d9cf39c5
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   21:     0x5d6f81695347 - rustlings::exercise::test::test_clean::{{closure}}::hb474781e8458c883
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   22:     0x5d6f81692966 - core::ops::function::FnOnce::call_once::h23fcde095e4fe40b
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5d6f816deefb - core::ops::function::FnOnce::call_once::h2b334953e617de9b
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5d6f816deefb - test::__rust_begin_short_backtrace::h8faab66b1ff1d0c8
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:621:18
[INFO] [stdout]   25:     0x5d6f816de7e8 - test::run_test_in_process::{{closure}}::hfb9c1a00854dd37d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:644:60
[INFO] [stdout]   26:     0x5d6f816de7e8 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h74c9970fa5634840
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5d6f816de7e8 - std::panicking::try::do_call::hc4c1295047d6f2d7
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x5d6f816de7e8 - std::panicking::try::h67266f7a45240585
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x5d6f816de7e8 - std::panic::catch_unwind::h9bd43337d7e40f31
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x5d6f816de7e8 - test::run_test_in_process::hcd26e1ba57fd34c2
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:644:27
[INFO] [stdout]   31:     0x5d6f816de7e8 - test::run_test::{{closure}}::h7249fd59f504e406
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:565:43
[INFO] [stdout]   32:     0x5d6f816a2a14 - test::run_test::{{closure}}::h9278596bd856801d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:595:41
[INFO] [stdout]   33:     0x5d6f816a2a14 - std::sys::backtrace::__rust_begin_short_backtrace::h81ab71768b07ffb5
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x5d6f816a60c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hd39edce2d4305e8d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/thread/mod.rs:521:17
[INFO] [stdout]   35:     0x5d6f816a60c2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hffcde42bb45e43d3
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5d6f816a60c2 - std::panicking::try::do_call::h30d61604663dff17
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x5d6f816a60c2 - std::panicking::try::h7b8b36119ae94880
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x5d6f816a60c2 - std::panic::catch_unwind::h4a4bb2ef7a88f652
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x5d6f816a60c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::hd62ab97c763f4e34
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/thread/mod.rs:520:30
[INFO] [stdout]   40:     0x5d6f816a60c2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h0a89a60c6ceef6b4
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5d6f8184820b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5de9072f83a0d37c
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   42:     0x5d6f8184820b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbbf67a38c5e8c30f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   43:     0x5d6f8184820b - std::sys::pal::unix::thread::Thread::new::thread_start::hb547260a5233ab58
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x77cae612aac3 - <unknown>
[INFO] [stdout]   45:     0x77cae61bba04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output 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/./rmetaWVvVdT\"\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:     0x5d6f8184271a - std::backtrace_rs::backtrace::libunwind::trace::h24270b8ca84976f5
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x5d6f8184271a - std::backtrace_rs::backtrace::trace_unsynchronized::h02001f29f8a7f873
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5d6f8184271a - std::sys::backtrace::_print_fmt::hec0fad1ff9d0ced9
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5d6f8184271a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h64292488f7f2250f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5d6f818693a3 - core::fmt::rt::Argument::fmt::h5a186eb42f172f83
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x5d6f818693a3 - core::fmt::write::h481de9317912dd10
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/fmt/mod.rs:1186:21
[INFO] [stdout]    6:     0x5d6f8183f353 - std::io::Write::write_fmt::hf3775693c09b4454
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/io/mod.rs:1839:15
[INFO] [stdout]    7:     0x5d6f81842562 - std::sys::backtrace::BacktraceLock::print::h8adcaf0142651003
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5d6f81843bc5 - std::panicking::default_hook::{{closure}}::h15fb66ff6c6741f9
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x5d6f818439b8 - std::panicking::default_hook::hb9ad284307d8f928
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x5d6f816da639 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7b6ff508218c42a0
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   11:     0x5d6f816da639 - test::test_main::{{closure}}::hbc464be6eb0d2a52
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:133:21
[INFO] [stdout]   12:     0x5d6f818442c8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4be8ec3e201e2cf3
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   13:     0x5d6f818442c8 - std::panicking::rust_panic_with_hook::h66f68b895f94d79f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x5d6f8184408a - std::panicking::begin_panic_handler::{{closure}}::hca74b9b22568e264
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x5d6f81842bf9 - std::sys::backtrace::__rust_end_short_backtrace::h74dd0769b8a109e0
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x5d6f81843d1c - rust_begin_unwind
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x5d6f81867d60 - core::panicking::panic_fmt::h9d563f5dc1b01cab
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panicking.rs:74:14
[INFO] [stdout]   18:     0x5d6f818681e6 - core::result::unwrap_failed::he99f077262f32dcd
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/result.rs:1695:5
[INFO] [stdout]   19:     0x5d6f8169626a - core::result::Result<T,E>::unwrap::h921bfa7096fb505e
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/result.rs:1103:23
[INFO] [stdout]   20:     0x5d6f8169626a - rustlings::exercise::test::test_exercise_with_output::h54f733cf31f565bd
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   21:     0x5d6f81696077 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hffbed3273e8c99cf
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   22:     0x5d6f81692a66 - core::ops::function::FnOnce::call_once::h84556d39406e4efd
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5d6f816deefb - core::ops::function::FnOnce::call_once::h2b334953e617de9b
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5d6f816deefb - test::__rust_begin_short_backtrace::h8faab66b1ff1d0c8
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:621:18
[INFO] [stdout]   25:     0x5d6f816de7e8 - test::run_test_in_process::{{closure}}::hfb9c1a00854dd37d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:644:60
[INFO] [stdout]   26:     0x5d6f816de7e8 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h74c9970fa5634840
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5d6f816de7e8 - std::panicking::try::do_call::hc4c1295047d6f2d7
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x5d6f816de7e8 - std::panicking::try::h67266f7a45240585
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x5d6f816de7e8 - std::panic::catch_unwind::h9bd43337d7e40f31
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x5d6f816de7e8 - test::run_test_in_process::hcd26e1ba57fd34c2
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:644:27
[INFO] [stdout]   31:     0x5d6f816de7e8 - test::run_test::{{closure}}::h7249fd59f504e406
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:565:43
[INFO] [stdout]   32:     0x5d6f816a2a14 - test::run_test::{{closure}}::h9278596bd856801d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/test/src/lib.rs:595:41
[INFO] [stdout]   33:     0x5d6f816a2a14 - std::sys::backtrace::__rust_begin_short_backtrace::h81ab71768b07ffb5
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x5d6f816a60c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hd39edce2d4305e8d
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/thread/mod.rs:521:17
[INFO] [stdout]   35:     0x5d6f816a60c2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hffcde42bb45e43d3
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5d6f816a60c2 - std::panicking::try::do_call::h30d61604663dff17
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x5d6f816a60c2 - std::panicking::try::h7b8b36119ae94880
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x5d6f816a60c2 - std::panic::catch_unwind::h4a4bb2ef7a88f652
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x5d6f816a60c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::hd62ab97c763f4e34
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/thread/mod.rs:520:30
[INFO] [stdout]   40:     0x5d6f816a60c2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h0a89a60c6ceef6b4
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5d6f8184820b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5de9072f83a0d37c
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   42:     0x5d6f8184820b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbbf67a38c5e8c30f
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   43:     0x5d6f8184820b - std::sys::pal::unix::thread::Thread::new::thread_start::hb547260a5233ab58
[INFO] [stdout]                                at /rustc/f23b22458132fb20faeb8a915b1c252478696f25/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x77cae612aac3 - <unknown>
[INFO] [stdout]   45:     0x77cae61bba04 - clone
[INFO] [stdout]   46:                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 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "d51912f836241196e6641af33edea85906d1eeda527a15d0b3499e2f4c8dcf4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d51912f836241196e6641af33edea85906d1eeda527a15d0b3499e2f4c8dcf4f", kill_on_drop: false }`
[INFO] [stdout] d51912f836241196e6641af33edea85906d1eeda527a15d0b3499e2f4c8dcf4f