[INFO] cloning repository https://github.com/arpitanand333/Rustlings-problem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arpitanand333/Rustlings-problem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farpitanand333%2FRustlings-problem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farpitanand333%2FRustlings-problem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d4f9592dea8b1f93c78a71f3ceaf8a2044bd24b
[INFO] testing arpitanand333/Rustlings-problem 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%2Farpitanand333%2FRustlings-problem" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arpitanand333/Rustlings-problem 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/arpitanand333/Rustlings-problem
[INFO] finished tweaking git repo https://github.com/arpitanand333/Rustlings-problem
[INFO] tweaked toml for git repo https://github.com/arpitanand333/Rustlings-problem written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/arpitanand333/Rustlings-problem 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e17036cf1602dc9737616b31dfb156c02ad34f01e415956e2b499468a2af886a
[INFO] running `Command { std: "docker" "start" "-a" "e17036cf1602dc9737616b31dfb156c02ad34f01e415956e2b499468a2af886a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e17036cf1602dc9737616b31dfb156c02ad34f01e415956e2b499468a2af886a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e17036cf1602dc9737616b31dfb156c02ad34f01e415956e2b499468a2af886a", kill_on_drop: false }`
[INFO] [stdout] e17036cf1602dc9737616b31dfb156c02ad34f01e415956e2b499468a2af886a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] bfdab0253ad3b9fd7b76f815838efa62f9154deba855afd5d14e0b2e6aa2baeb
[INFO] running `Command { std: "docker" "start" "-a" "bfdab0253ad3b9fd7b76f815838efa62f9154deba855afd5d14e0b2e6aa2baeb", 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 log v0.4.14
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v5.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.02s
[INFO] running `Command { std: "docker" "inspect" "bfdab0253ad3b9fd7b76f815838efa62f9154deba855afd5d14e0b2e6aa2baeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfdab0253ad3b9fd7b76f815838efa62f9154deba855afd5d14e0b2e6aa2baeb", kill_on_drop: false }`
[INFO] [stdout] bfdab0253ad3b9fd7b76f815838efa62f9154deba855afd5d14e0b2e6aa2baeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 5f5dd50bce808c8e71da942e94216f7fb6c19e422bccb1228f369ff747244db7
[INFO] running `Command { std: "docker" "start" "-a" "5f5dd50bce808c8e71da942e94216f7fb6c19e422bccb1228f369ff747244db7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling treeline v0.1.0
[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 v5.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.97s
[INFO] running `Command { std: "docker" "inspect" "5f5dd50bce808c8e71da942e94216f7fb6c19e422bccb1228f369ff747244db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f5dd50bce808c8e71da942e94216f7fb6c19e422bccb1228f369ff747244db7", kill_on_drop: false }`
[INFO] [stdout] 5f5dd50bce808c8e71da942e94216f7fb6c19e422bccb1228f369ff747244db7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 3f9d42bf373098f07bb0c370e9ca76f1f87924e5ce5ce3f23bf0c2c24520f0c6
[INFO] running `Command { std: "docker" "start" "-a" "3f9d42bf373098f07bb0c370e9ca76f1f87924e5ce5ce3f23bf0c2c24520f0c6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-37191d444fd61b6d)
[INFO] [stdout] 
[INFO] [stdout] running 4 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] 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:273:36:
[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:     0x5e095a732d92 - 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:     0x5e095a732d92 - 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:     0x5e095a732d92 - std::sys::backtrace::_print_fmt::h73b6844d523a91e6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5e095a732d92 - <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:     0x5e095a758ff3 - core::fmt::rt::Argument::fmt::h96dc2668ac588484
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/rt.rs:184:76
[INFO] [stdout]    5:     0x5e095a758ff3 - core::fmt::write::h3c068850dd3fcd11
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/mod.rs:1480:21
[INFO] [stdout]    6:     0x5e095a730453 - std::io::default_write_fmt::h9f5cac5e26eafb82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5e095a730453 - std::io::Write::write_fmt::h9be88ac981c80255
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x5e095a732be2 - std::sys::backtrace::BacktraceLock::print::h160d33c700b1accf
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5e095a73417c - std::panicking::default_hook::{{closure}}::hdccf862335980e92
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x5e095a733fd2 - std::panicking::default_hook::h92ea296b4f4c5d78
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5e095a5ce684 - <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:     0x5e095a5ce684 - test::test_main::{{closure}}::h068e739b3ff3ace9
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x5e095a734bf3 - <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:     0x5e095a734bf3 - std::panicking::rust_panic_with_hook::h53eb519a340d7090
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5e095a7348ca - std::panicking::begin_panic_handler::{{closure}}::h1b012222d781940d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5e095a733289 - std::sys::backtrace::__rust_end_short_backtrace::hb1c00a6a74936045
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x5e095a73455d - __rustc[3fad54a3e94379e3]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5e095a5856f0 - core::panicking::panic_fmt::h5646b0c12be1dead
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5e095a585b86 - core::result::unwrap_failed::hc06d646aff6e2a9a
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1704:5
[INFO] [stdout]   20:     0x5e095a58f45c - core::result::Result<T,E>::unwrap::h14ee3018135afbde
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1109:23
[INFO] [stdout]   21:     0x5e095a58f45c - rustlings::exercise::test::test_clean::ha8343b8f3785e47f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:273:9
[INFO] [stdout]   22:     0x5e095a58f397 - rustlings::exercise::test::test_clean::{{closure}}::h9f06e6ea7708eafd
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:272:20
[INFO] [stdout]   23:     0x5e095a587426 - core::ops::function::FnOnce::call_once::he8a0731e7ae9ef25
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5e095a5d3fdb - core::ops::function::FnOnce::call_once::h36fc4a9de3ab6dc6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5e095a5d3fdb - test::__rust_begin_short_backtrace::ha0a98bb69b358a31
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:638:18
[INFO] [stdout]   26:     0x5e095a5d2fcf - test::run_test_in_process::{{closure}}::h8c178d13fba0a588
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:60
[INFO] [stdout]   27:     0x5e095a5d2fcf - <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:     0x5e095a5d2fcf - std::panicking::try::do_call::h4af5be696220e430
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x5e095a5d2fcf - std::panicking::try::hbf49a526ff439d5e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x5e095a5d2fcf - std::panic::catch_unwind::h73db1b343ad1c705
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5e095a5d2fcf - test::run_test_in_process::hef059ed743ea6437
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:27
[INFO] [stdout]   32:     0x5e095a5d2fcf - test::run_test::{{closure}}::h9508bce7fbf1ad82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:582:43
[INFO] [stdout]   33:     0x5e095a597724 - test::run_test::{{closure}}::h70f94fa995999514
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:612:41
[INFO] [stdout]   34:     0x5e095a597724 - std::sys::backtrace::__rust_begin_short_backtrace::hfc7043e7c8324aca
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x5e095a59b01a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h599c966db81290c0
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x5e095a59b01a - <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:     0x5e095a59b01a - std::panicking::try::do_call::h336d5bb945571c50
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x5e095a59b01a - std::panicking::try::hea8a9a2c11807957
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x5e095a59b01a - std::panic::catch_unwind::hc46631a6d929f68d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5e095a59b01a - std::thread::Builder::spawn_unchecked_::{{closure}}::he5729da5506c58d1
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x5e095a59b01a - 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:     0x5e095a73694b - <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:     0x5e095a73694b - <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:     0x5e095a73694b - 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:     0x7ec2cd28eaa4 - <unknown>
[INFO] [stdout]   46:     0x7ec2cd31ba34 - 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:346:38:
[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/./rmetamzz65l\"\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:     0x5e095a732d92 - 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:     0x5e095a732d92 - 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:     0x5e095a732d92 - std::sys::backtrace::_print_fmt::h73b6844d523a91e6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5e095a732d92 - <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:     0x5e095a758ff3 - core::fmt::rt::Argument::fmt::h96dc2668ac588484
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/rt.rs:184:76
[INFO] [stdout]    5:     0x5e095a758ff3 - core::fmt::write::h3c068850dd3fcd11
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/fmt/mod.rs:1480:21
[INFO] [stdout]    6:     0x5e095a730453 - std::io::default_write_fmt::h9f5cac5e26eafb82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5e095a730453 - std::io::Write::write_fmt::h9be88ac981c80255
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x5e095a732be2 - std::sys::backtrace::BacktraceLock::print::h160d33c700b1accf
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5e095a73417c - std::panicking::default_hook::{{closure}}::hdccf862335980e92
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x5e095a733fd2 - std::panicking::default_hook::h92ea296b4f4c5d78
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5e095a5ce684 - <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:     0x5e095a5ce684 - test::test_main::{{closure}}::h068e739b3ff3ace9
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x5e095a734bf3 - <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:     0x5e095a734bf3 - std::panicking::rust_panic_with_hook::h53eb519a340d7090
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5e095a7348ca - std::panicking::begin_panic_handler::{{closure}}::h1b012222d781940d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5e095a733289 - std::sys::backtrace::__rust_end_short_backtrace::hb1c00a6a74936045
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x5e095a73455d - __rustc[3fad54a3e94379e3]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5e095a5856f0 - core::panicking::panic_fmt::h5646b0c12be1dead
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5e095a585b86 - core::result::unwrap_failed::hc06d646aff6e2a9a
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1704:5
[INFO] [stdout]   20:     0x5e095a5902f6 - core::result::Result<T,E>::unwrap::h03214b79119477b6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/result.rs:1109:23
[INFO] [stdout]   21:     0x5e095a5902f6 - rustlings::exercise::test::test_exercise_with_output::h2ed60e588075b0a3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:346:19
[INFO] [stdout]   22:     0x5e095a5900f7 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hde21f419e1c2da34
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:339:35
[INFO] [stdout]   23:     0x5e095a587326 - core::ops::function::FnOnce::call_once::h5372bc8ff5911af8
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5e095a5d3fdb - core::ops::function::FnOnce::call_once::h36fc4a9de3ab6dc6
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5e095a5d3fdb - test::__rust_begin_short_backtrace::ha0a98bb69b358a31
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:638:18
[INFO] [stdout]   26:     0x5e095a5d2fcf - test::run_test_in_process::{{closure}}::h8c178d13fba0a588
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:60
[INFO] [stdout]   27:     0x5e095a5d2fcf - <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:     0x5e095a5d2fcf - std::panicking::try::do_call::h4af5be696220e430
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x5e095a5d2fcf - std::panicking::try::hbf49a526ff439d5e
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x5e095a5d2fcf - std::panic::catch_unwind::h73db1b343ad1c705
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5e095a5d2fcf - test::run_test_in_process::hef059ed743ea6437
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:661:27
[INFO] [stdout]   32:     0x5e095a5d2fcf - test::run_test::{{closure}}::h9508bce7fbf1ad82
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:582:43
[INFO] [stdout]   33:     0x5e095a597724 - test::run_test::{{closure}}::h70f94fa995999514
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/test/src/lib.rs:612:41
[INFO] [stdout]   34:     0x5e095a597724 - std::sys::backtrace::__rust_begin_short_backtrace::hfc7043e7c8324aca
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x5e095a59b01a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h599c966db81290c0
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x5e095a59b01a - <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:     0x5e095a59b01a - std::panicking::try::do_call::h336d5bb945571c50
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x5e095a59b01a - std::panicking::try::hea8a9a2c11807957
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x5e095a59b01a - std::panic::catch_unwind::hc46631a6d929f68d
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5e095a59b01a - std::thread::Builder::spawn_unchecked_::{{closure}}::he5729da5506c58d1
[INFO] [stdout]                                at /rustc/a5948295b4bf4c6199457f1227e5d8f6e6b9f948/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x5e095a59b01a - 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:     0x5e095a73694b - <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:     0x5e095a73694b - <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:     0x5e095a73694b - 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:     0x7ec2cd28eaa4 - <unknown>
[INFO] [stdout]   46:     0x7ec2cd31ba34 - 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 0.14s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "3f9d42bf373098f07bb0c370e9ca76f1f87924e5ce5ce3f23bf0c2c24520f0c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f9d42bf373098f07bb0c370e9ca76f1f87924e5ce5ce3f23bf0c2c24520f0c6", kill_on_drop: false }`
[INFO] [stdout] 3f9d42bf373098f07bb0c370e9ca76f1f87924e5ce5ce3f23bf0c2c24520f0c6