[INFO] cloning repository https://github.com/j-chmielewski/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/j-chmielewski/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-chmielewski%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-chmielewski%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fdcc30ca19fcee5b1655fd41f704dafa212fd6fc
[INFO] testing j-chmielewski/rustlings against beta-2025-01-12 for beta-1.85-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-chmielewski%2Frustlings" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/j-chmielewski/rustlings on toolchain beta-2025-01-12
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-01-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/j-chmielewski/rustlings
[INFO] finished tweaking git repo https://github.com/j-chmielewski/rustlings
[INFO] tweaked toml for git repo https://github.com/j-chmielewski/rustlings written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/j-chmielewski/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-01-12" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-01-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b639dee5151a66d1568eb7bab82893206633f6d09eabac30b41161ee6038dd1
[INFO] running `Command { std: "docker" "start" "-a" "6b639dee5151a66d1568eb7bab82893206633f6d09eabac30b41161ee6038dd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b639dee5151a66d1568eb7bab82893206633f6d09eabac30b41161ee6038dd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b639dee5151a66d1568eb7bab82893206633f6d09eabac30b41161ee6038dd1", kill_on_drop: false }`
[INFO] [stdout] 6b639dee5151a66d1568eb7bab82893206633f6d09eabac30b41161ee6038dd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-01-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc14d528b1b99f2b19e96f0ac9c4f42cf85fa4c68237f264c4ab1e642f13aaef
[INFO] running `Command { std: "docker" "start" "-a" "cc14d528b1b99f2b19e96f0ac9c4f42cf85fa4c68237f264c4ab1e642f13aaef", 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
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[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v5.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.49s
[INFO] running `Command { std: "docker" "inspect" "cc14d528b1b99f2b19e96f0ac9c4f42cf85fa4c68237f264c4ab1e642f13aaef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc14d528b1b99f2b19e96f0ac9c4f42cf85fa4c68237f264c4ab1e642f13aaef", kill_on_drop: false }`
[INFO] [stdout] cc14d528b1b99f2b19e96f0ac9c4f42cf85fa4c68237f264c4ab1e642f13aaef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-01-12" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3441643dcd7601f22a66965ee45da861ffb8f10c11af138eb5fcf685789f55ee
[INFO] running `Command { std: "docker" "start" "-a" "3441643dcd7601f22a66965ee45da861ffb8f10c11af138eb5fcf685789f55ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling escargot v0.4.0
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[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[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 v5.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.19s
[INFO] running `Command { std: "docker" "inspect" "3441643dcd7601f22a66965ee45da861ffb8f10c11af138eb5fcf685789f55ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3441643dcd7601f22a66965ee45da861ffb8f10c11af138eb5fcf685789f55ee", kill_on_drop: false }`
[INFO] [stdout] 3441643dcd7601f22a66965ee45da861ffb8f10c11af138eb5fcf685789f55ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-01-12" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d7adab37d225d96c6d222114b22f16ff463e16f1d21fb15960c4443269015d5b
[INFO] running `Command { std: "docker" "start" "-a" "d7adab37d225d96c6d222114b22f16ff463e16f1d21fb15960c4443269015d5b", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-1e63eece9058d19f)
[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:     0x64b344a4f99a - std::backtrace_rs::backtrace::libunwind::trace::ha13ab8a94fd3bb92
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x64b344a4f99a - std::backtrace_rs::backtrace::trace_unsynchronized::h2a4c556e569d314b
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x64b344a4f99a - std::sys::backtrace::_print_fmt::hf52186dec7bdf1bb
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x64b344a4f99a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb5c3379828c15690
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x64b344a75653 - core::fmt::rt::Argument::fmt::h8220db795cd6f76c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x64b344a75653 - core::fmt::write::hd20c41beeec2e8c0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/fmt/mod.rs:1440:21
[INFO] [stdout]    6:     0x64b344a4caa3 - std::io::Write::write_fmt::hf276ec928345bea3
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/io/mod.rs:1887:15
[INFO] [stdout]    7:     0x64b344a4f7e2 - std::sys::backtrace::BacktraceLock::print::h4fa77b65bb5ed2ec
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x64b344a50ed0 - std::panicking::default_hook::{{closure}}::hd3560f93167cf51e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:295:22
[INFO] [stdout]    9:     0x64b344a50c6d - std::panicking::default_hook::h361b8e3c5cbb2501
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:319:9
[INFO] [stdout]   10:     0x64b3448e9363 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h52b4c42c9dce8b0e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   11:     0x64b3448e9363 - test::test_main::{{closure}}::h1a9dc25180417899
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x64b344a51703 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h080867abcafb687f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   13:     0x64b344a51703 - std::panicking::rust_panic_with_hook::h7e187ba6ef3a8505
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:836:13
[INFO] [stdout]   14:     0x64b344a513da - std::panicking::begin_panic_handler::{{closure}}::h2160aaedd30b4698
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:701:13
[INFO] [stdout]   15:     0x64b344a4fe99 - std::sys::backtrace::__rust_end_short_backtrace::h2544fe16c7a2009f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x64b344a5106d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:692:5
[INFO] [stdout]   17:     0x64b34489f3a0 - core::panicking::panic_fmt::h55d7693adb8e1cee
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x64b34489f816 - core::result::unwrap_failed::h630dfdc7f21633d0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/result.rs:1704:5
[INFO] [stdout]   19:     0x64b3448a54da - core::result::Result<T,E>::unwrap::h2e9716ab49f0e3be
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/result.rs:1109:23
[INFO] [stdout]   20:     0x64b3448a54da - rustlings::exercise::test::test_clean::hfbbcc070a96be688
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:273:9
[INFO] [stdout]   21:     0x64b3448a5417 - rustlings::exercise::test::test_clean::{{closure}}::hb0a306050bec116f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:272:20
[INFO] [stdout]   22:     0x64b3448a6e96 - core::ops::function::FnOnce::call_once::h7599bd9e2b0d84f8
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x64b3448eebbb - core::ops::function::FnOnce::call_once::h42df3dc9a56fb705
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x64b3448eebbb - test::__rust_begin_short_backtrace::hf2ff4d4d12dd75b0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x64b3448eda43 - test::run_test_in_process::{{closure}}::h8461a23c6c0ac10c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x64b3448eda43 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hefab1bfcb42baf2e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x64b3448eda43 - std::panicking::try::do_call::h75c82cb1133d19f1
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:584:40
[INFO] [stdout]   28:     0x64b3448eda43 - std::panicking::try::h41d68fc63841231a
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:547:19
[INFO] [stdout]   29:     0x64b3448eda43 - std::panic::catch_unwind::h7a7ff6adf9e0c698
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x64b3448eda43 - test::run_test_in_process::hcd527530689ec177
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x64b3448eda43 - test::run_test::{{closure}}::h51ba581aac56ca21
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x64b3448b1745 - test::run_test::{{closure}}::h9d0d2581742c4e6c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x64b3448b1745 - std::sys::backtrace::__rust_begin_short_backtrace::h94b953e0285eca69
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x64b3448b51d6 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hac891bfe52f0501a
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/thread/mod.rs:564:17
[INFO] [stdout]   35:     0x64b3448b51d6 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd4f76b3ef0615394
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x64b3448b51d6 - std::panicking::try::do_call::h31b1a419f4fa670c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:584:40
[INFO] [stdout]   37:     0x64b3448b51d6 - std::panicking::try::h277e348adef7f0af
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:547:19
[INFO] [stdout]   38:     0x64b3448b51d6 - std::panic::catch_unwind::h06db5059e51a109d
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x64b3448b51d6 - std::thread::Builder::spawn_unchecked_::{{closure}}::h048aed1b5c822396
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/thread/mod.rs:562:30
[INFO] [stdout]   40:     0x64b3448b51d6 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9f03098da71d0b51
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x64b344a5579b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hcc221cc1d8cbbdc7
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:1993:9
[INFO] [stdout]   42:     0x64b344a5579b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he5e5264a0dcd6e5f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:1993:9
[INFO] [stdout]   43:     0x64b344a5579b - std::sys::pal::unix::thread::Thread::new::thread_start::h307a072356a0dfca
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/pal/unix/thread.rs:106:17
[INFO] [stdout]   44:     0x78e9afe29ac3 - <unknown>
[INFO] [stdout]   45:     0x78e9afebaa04 - clone
[INFO] [stdout]   46:                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/./rmeta1Yn8Z5\"\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:     0x64b344a4f99a - std::backtrace_rs::backtrace::libunwind::trace::ha13ab8a94fd3bb92
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x64b344a4f99a - std::backtrace_rs::backtrace::trace_unsynchronized::h2a4c556e569d314b
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x64b344a4f99a - std::sys::backtrace::_print_fmt::hf52186dec7bdf1bb
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x64b344a4f99a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb5c3379828c15690
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x64b344a75653 - core::fmt::rt::Argument::fmt::h8220db795cd6f76c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x64b344a75653 - core::fmt::write::hd20c41beeec2e8c0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/fmt/mod.rs:1440:21
[INFO] [stdout]    6:     0x64b344a4caa3 - std::io::Write::write_fmt::hf276ec928345bea3
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/io/mod.rs:1887:15
[INFO] [stdout]    7:     0x64b344a4f7e2 - std::sys::backtrace::BacktraceLock::print::h4fa77b65bb5ed2ec
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x64b344a50ed0 - std::panicking::default_hook::{{closure}}::hd3560f93167cf51e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:295:22
[INFO] [stdout]    9:     0x64b344a50c6d - std::panicking::default_hook::h361b8e3c5cbb2501
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:319:9
[INFO] [stdout]   10:     0x64b3448e9363 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h52b4c42c9dce8b0e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   11:     0x64b3448e9363 - test::test_main::{{closure}}::h1a9dc25180417899
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x64b344a51703 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h080867abcafb687f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   13:     0x64b344a51703 - std::panicking::rust_panic_with_hook::h7e187ba6ef3a8505
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:836:13
[INFO] [stdout]   14:     0x64b344a513da - std::panicking::begin_panic_handler::{{closure}}::h2160aaedd30b4698
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:701:13
[INFO] [stdout]   15:     0x64b344a4fe99 - std::sys::backtrace::__rust_end_short_backtrace::h2544fe16c7a2009f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x64b344a5106d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:692:5
[INFO] [stdout]   17:     0x64b34489f3a0 - core::panicking::panic_fmt::h55d7693adb8e1cee
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x64b34489f816 - core::result::unwrap_failed::h630dfdc7f21633d0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/result.rs:1704:5
[INFO] [stdout]   19:     0x64b3448a634a - core::result::Result<T,E>::unwrap::h7787304b8233ed7e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/result.rs:1109:23
[INFO] [stdout]   20:     0x64b3448a634a - rustlings::exercise::test::test_exercise_with_output::h8875415824b574ec
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:346:19
[INFO] [stdout]   21:     0x64b3448a6157 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h7e33c7414af786cc
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:339:35
[INFO] [stdout]   22:     0x64b3448a6de6 - core::ops::function::FnOnce::call_once::h0678d08105425ad2
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x64b3448eebbb - core::ops::function::FnOnce::call_once::h42df3dc9a56fb705
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x64b3448eebbb - test::__rust_begin_short_backtrace::hf2ff4d4d12dd75b0
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x64b3448eda43 - test::run_test_in_process::{{closure}}::h8461a23c6c0ac10c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x64b3448eda43 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hefab1bfcb42baf2e
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x64b3448eda43 - std::panicking::try::do_call::h75c82cb1133d19f1
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:584:40
[INFO] [stdout]   28:     0x64b3448eda43 - std::panicking::try::h41d68fc63841231a
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:547:19
[INFO] [stdout]   29:     0x64b3448eda43 - std::panic::catch_unwind::h7a7ff6adf9e0c698
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x64b3448eda43 - test::run_test_in_process::hcd527530689ec177
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x64b3448eda43 - test::run_test::{{closure}}::h51ba581aac56ca21
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x64b3448b1745 - test::run_test::{{closure}}::h9d0d2581742c4e6c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x64b3448b1745 - std::sys::backtrace::__rust_begin_short_backtrace::h94b953e0285eca69
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x64b3448b51d6 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hac891bfe52f0501a
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/thread/mod.rs:564:17
[INFO] [stdout]   35:     0x64b3448b51d6 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd4f76b3ef0615394
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x64b3448b51d6 - std::panicking::try::do_call::h31b1a419f4fa670c
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:584:40
[INFO] [stdout]   37:     0x64b3448b51d6 - std::panicking::try::h277e348adef7f0af
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panicking.rs:547:19
[INFO] [stdout]   38:     0x64b3448b51d6 - std::panic::catch_unwind::h06db5059e51a109d
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x64b3448b51d6 - std::thread::Builder::spawn_unchecked_::{{closure}}::h048aed1b5c822396
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/thread/mod.rs:562:30
[INFO] [stdout]   40:     0x64b3448b51d6 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9f03098da71d0b51
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x64b344a5579b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hcc221cc1d8cbbdc7
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:1993:9
[INFO] [stdout]   42:     0x64b344a5579b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he5e5264a0dcd6e5f
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/alloc/src/boxed.rs:1993:9
[INFO] [stdout]   43:     0x64b344a5579b - std::sys::pal::unix::thread::Thread::new::thread_start::h307a072356a0dfca
[INFO] [stdout]                                at /rustc/fe9b9751fa54a5871b87cd36a582f9b7b06123fd/library/std/src/sys/pal/unix/thread.rs:106:17
[INFO] [stdout]   44:     0x78e9afe29ac3 - <unknown>
[INFO] [stdout]   45:     0x78e9afebaa04 - 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 0.28s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "d7adab37d225d96c6d222114b22f16ff463e16f1d21fb15960c4443269015d5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7adab37d225d96c6d222114b22f16ff463e16f1d21fb15960c4443269015d5b", kill_on_drop: false }`
[INFO] [stdout] d7adab37d225d96c6d222114b22f16ff463e16f1d21fb15960c4443269015d5b