[INFO] cloning repository https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan
[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-2023-autumn-Fantaschan" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-Fantaschan", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-Fantaschan'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02b39aa425cef25fb3a04535b1e10a1b9901c782
[INFO] testing LearningOS/rust-rustlings-2023-autumn-Fantaschan/02b39aa425cef25fb3a04535b1e10a1b9901c782 against 1.84.0 for beta-1.85-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-Fantaschan" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan on toolchain 1.84.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.84.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan
[INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan
[INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-Fantaschan already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.84.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c028b76dec6f6074dda2972c7b7d1f5ad475de690060730a382dbe30bd4a94f
[INFO] running `Command { std: "docker" "start" "-a" "0c028b76dec6f6074dda2972c7b7d1f5ad475de690060730a382dbe30bd4a94f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c028b76dec6f6074dda2972c7b7d1f5ad475de690060730a382dbe30bd4a94f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c028b76dec6f6074dda2972c7b7d1f5ad475de690060730a382dbe30bd4a94f", kill_on_drop: false }`
[INFO] [stdout] 0c028b76dec6f6074dda2972c7b7d1f5ad475de690060730a382dbe30bd4a94f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c01039ff4dfc67c6beb0c2c86484e0a0c946f5c4a1405cf913349c397c9e3a3a
[INFO] running `Command { std: "docker" "start" "-a" "c01039ff4dfc67c6beb0c2c86484e0a0c946f5c4a1405cf913349c397c9e3a3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.29s
[INFO] running `Command { std: "docker" "inspect" "c01039ff4dfc67c6beb0c2c86484e0a0c946f5c4a1405cf913349c397c9e3a3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c01039ff4dfc67c6beb0c2c86484e0a0c946f5c4a1405cf913349c397c9e3a3a", kill_on_drop: false }`
[INFO] [stdout] c01039ff4dfc67c6beb0c2c86484e0a0c946f5c4a1405cf913349c397c9e3a3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05917d38037fd9308962ae490a64a6d31385afe9f3d20dc2f6d1822feba77a12
[INFO] running `Command { std: "docker" "start" "-a" "05917d38037fd9308962ae490a64a6d31385afe9f3d20dc2f6d1822feba77a12", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.52s
[INFO] running `Command { std: "docker" "inspect" "05917d38037fd9308962ae490a64a6d31385afe9f3d20dc2f6d1822feba77a12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05917d38037fd9308962ae490a64a6d31385afe9f3d20dc2f6d1822feba77a12", kill_on_drop: false }`
[INFO] [stdout] 05917d38037fd9308962ae490a64a6d31385afe9f3d20dc2f6d1822feba77a12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5d0d783eee41fdc7467460d5687722366f3d755cbb394da1eea93401d3345133
[INFO] running `Command { std: "docker" "start" "-a" "5d0d783eee41fdc7467460d5687722366f3d755cbb394da1eea93401d3345133", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-dcdc30ac92c28ddd)
[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] thread 'exercise::test::test_clean' panicked at src/exercise.rs:303:36:
[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:     0x63e0ee41e98a - std::backtrace_rs::backtrace::libunwind::trace::hfe0e1def394da018
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x63e0ee41e98a - std::backtrace_rs::backtrace::trace_unsynchronized::h96fbb6d117554616
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x63e0ee41e98a - std::sys::backtrace::_print_fmt::he1169c6f8956325b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x63e0ee41e98a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha4a311b32f6b4ad8
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x63e0ee444af3 - core::fmt::rt::Argument::fmt::h8ccd2627d2418ed3
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x63e0ee444af3 - core::fmt::write::h1866771663f62b81
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/mod.rs:1189:21
[INFO] [stdout]    6:     0x63e0ee41bb13 - std::io::Write::write_fmt::h2df399c9fb8c6039
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/io/mod.rs:1884:15
[INFO] [stdout]    7:     0x63e0ee41e7d2 - std::sys::backtrace::BacktraceLock::print::hddd3a9918ce29aa7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x63e0ee41fe0d - std::panicking::default_hook::{{closure}}::h791f75256b902d7d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x63e0ee41fc17 - std::panicking::default_hook::h82cc572fcb0d8cd7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x63e0ee1c5367 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h47f4385e5c05a6bc
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   11:     0x63e0ee1c5367 - test::test_main::{{closure}}::h592b6187ee9bbe51
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x63e0ee4204b8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h80408f032954f187
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   13:     0x63e0ee4204b8 - std::panicking::rust_panic_with_hook::he21644cc2707f2c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x63e0ee42027a - std::panicking::begin_panic_handler::{{closure}}::h42f7c414fed3cad9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x63e0ee41ee69 - std::sys::backtrace::__rust_end_short_backtrace::ha26cf5766b4e8c65
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x63e0ee41ff0c - rust_begin_unwind
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x63e0ee17a230 - core::panicking::panic_fmt::h74866b78e934b1c0
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
[INFO] [stdout]   18:     0x63e0ee17a6b6 - core::result::unwrap_failed::h899ed7ab2ccb8159
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x63e0ee1853ba - core::result::Result<T,E>::unwrap::he6f61d6d555fffa6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x63e0ee1853ba - rustlings::exercise::test::test_clean::h39fc06c52a80980d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:303:9
[INFO] [stdout]   21:     0x63e0ee1852f7 - rustlings::exercise::test::test_clean::{{closure}}::h87bb2b4364749776
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:302:20
[INFO] [stdout]   22:     0x63e0ee1829f6 - core::ops::function::FnOnce::call_once::h2c521f6209d3299b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x63e0ee1c9f1b - core::ops::function::FnOnce::call_once::h2f54be8ccda9ff77
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x63e0ee1c9f1b - test::__rust_begin_short_backtrace::h505f4667df5bf10c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x63e0ee1c9878 - test::run_test_in_process::{{closure}}::h5ed3028e6069c117
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x63e0ee1c9878 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hbf705be6aea7c287
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x63e0ee1c9878 - std::panicking::try::do_call::h555223a41631f02b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x63e0ee1c9878 - std::panicking::try::he81e496d432108c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x63e0ee1c9878 - std::panic::catch_unwind::hb2ff356e76867b52
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x63e0ee1c9878 - test::run_test_in_process::h665bcd2e01d69f5b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x63e0ee1c9878 - test::run_test::{{closure}}::ha58fbc9c79c6786d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x63e0ee18d31a - test::run_test::{{closure}}::h958602d5fcb1d647
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x63e0ee18d31a - std::sys::backtrace::__rust_begin_short_backtrace::h7ca2fb16f64faa0f
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x63e0ee190bd4 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hebe77fbe87ddae61
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x63e0ee190bd4 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5e26d6a69f85d1d6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x63e0ee190bd4 - std::panicking::try::do_call::h9787fac579f00884
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x63e0ee190bd4 - std::panicking::try::h788012b555fbd7c5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x63e0ee190bd4 - std::panic::catch_unwind::hd194f26f99a98fb5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x63e0ee190bd4 - std::thread::Builder::spawn_unchecked_::{{closure}}::h31c0dcba34ed449c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x63e0ee190bd4 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60302d9c688101a6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x63e0ee4245db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9578f6ea1d4e1c4b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   42:     0x63e0ee4245db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf4a2f438d8019348
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   43:     0x63e0ee4245db - std::sys::pal::unix::thread::Thread::new::thread_start::h14f1eb868ff90fc9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x769849ef1ac3 - <unknown>
[INFO] [stdout]   45:     0x769849f82a04 - 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:376:38:
[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/./rmetamYrZqt\"\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:     0x63e0ee41e98a - std::backtrace_rs::backtrace::libunwind::trace::hfe0e1def394da018
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x63e0ee41e98a - std::backtrace_rs::backtrace::trace_unsynchronized::h96fbb6d117554616
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x63e0ee41e98a - std::sys::backtrace::_print_fmt::he1169c6f8956325b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x63e0ee41e98a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha4a311b32f6b4ad8
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x63e0ee444af3 - core::fmt::rt::Argument::fmt::h8ccd2627d2418ed3
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x63e0ee444af3 - core::fmt::write::h1866771663f62b81
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/mod.rs:1189:21
[INFO] [stdout]    6:     0x63e0ee41bb13 - std::io::Write::write_fmt::h2df399c9fb8c6039
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/io/mod.rs:1884:15
[INFO] [stdout]    7:     0x63e0ee41e7d2 - std::sys::backtrace::BacktraceLock::print::hddd3a9918ce29aa7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x63e0ee41fe0d - std::panicking::default_hook::{{closure}}::h791f75256b902d7d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x63e0ee41fc17 - std::panicking::default_hook::h82cc572fcb0d8cd7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x63e0ee1c5367 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h47f4385e5c05a6bc
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   11:     0x63e0ee1c5367 - test::test_main::{{closure}}::h592b6187ee9bbe51
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x63e0ee4204b8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h80408f032954f187
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   13:     0x63e0ee4204b8 - std::panicking::rust_panic_with_hook::he21644cc2707f2c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x63e0ee42027a - std::panicking::begin_panic_handler::{{closure}}::h42f7c414fed3cad9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x63e0ee41ee69 - std::sys::backtrace::__rust_end_short_backtrace::ha26cf5766b4e8c65
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x63e0ee41ff0c - rust_begin_unwind
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x63e0ee17a230 - core::panicking::panic_fmt::h74866b78e934b1c0
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
[INFO] [stdout]   18:     0x63e0ee17a6b6 - core::result::unwrap_failed::h899ed7ab2ccb8159
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x63e0ee18621a - core::result::Result<T,E>::unwrap::h338ce31bd784419d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x63e0ee18621a - rustlings::exercise::test::test_exercise_with_output::hc593f89b6793da9a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:376:19
[INFO] [stdout]   21:     0x63e0ee186027 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h3f51cac399264877
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:369:35
[INFO] [stdout]   22:     0x63e0ee182ae6 - core::ops::function::FnOnce::call_once::hd773f39ae1c85230
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x63e0ee1c9f1b - core::ops::function::FnOnce::call_once::h2f54be8ccda9ff77
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x63e0ee1c9f1b - test::__rust_begin_short_backtrace::h505f4667df5bf10c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x63e0ee1c9878 - test::run_test_in_process::{{closure}}::h5ed3028e6069c117
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x63e0ee1c9878 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hbf705be6aea7c287
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x63e0ee1c9878 - std::panicking::try::do_call::h555223a41631f02b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x63e0ee1c9878 - std::panicking::try::he81e496d432108c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x63e0ee1c9878 - std::panic::catch_unwind::hb2ff356e76867b52
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x63e0ee1c9878 - test::run_test_in_process::h665bcd2e01d69f5b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x63e0ee1c9878 - test::run_test::{{closure}}::ha58fbc9c79c6786d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x63e0ee18d31a - test::run_test::{{closure}}::h958602d5fcb1d647
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x63e0ee18d31a - std::sys::backtrace::__rust_begin_short_backtrace::h7ca2fb16f64faa0f
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x63e0ee190bd4 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hebe77fbe87ddae61
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x63e0ee190bd4 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5e26d6a69f85d1d6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x63e0ee190bd4 - std::panicking::try::do_call::h9787fac579f00884
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x63e0ee190bd4 - std::panicking::try::h788012b555fbd7c5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x63e0ee190bd4 - std::panic::catch_unwind::hd194f26f99a98fb5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x63e0ee190bd4 - std::thread::Builder::spawn_unchecked_::{{closure}}::h31c0dcba34ed449c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x63e0ee190bd4 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60302d9c688101a6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x63e0ee4245db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9578f6ea1d4e1c4b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   42:     0x63e0ee4245db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf4a2f438d8019348
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   43:     0x63e0ee4245db - std::sys::pal::unix::thread::Thread::new::thread_start::h14f1eb868ff90fc9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x769849ef1ac3 - <unknown>
[INFO] [stdout]   45:     0x769849f82a04 - 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 0.21s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "5d0d783eee41fdc7467460d5687722366f3d755cbb394da1eea93401d3345133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d0d783eee41fdc7467460d5687722366f3d755cbb394da1eea93401d3345133", kill_on_drop: false }`
[INFO] [stdout] 5d0d783eee41fdc7467460d5687722366f3d755cbb394da1eea93401d3345133