[INFO] cloning repository https://github.com/mangoez/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mangoez/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmangoez%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmangoez%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7baa0f8ec9c6c1f4bad4bd5e834f8925bec33b45
[INFO] testing mangoez/rustlings against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmangoez%2Frustlings" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mangoez/rustlings on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mangoez/rustlings
[INFO] finished tweaking git repo https://github.com/mangoez/rustlings
[INFO] tweaked toml for git repo https://github.com/mangoez/rustlings written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mangoez/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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0a022ad8db9053bcbb17f2d292cb34db8a8f13268f7009a1bd0b2546fe43d1f
[INFO] running `Command { std: "docker" "start" "-a" "c0a022ad8db9053bcbb17f2d292cb34db8a8f13268f7009a1bd0b2546fe43d1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0a022ad8db9053bcbb17f2d292cb34db8a8f13268f7009a1bd0b2546fe43d1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0a022ad8db9053bcbb17f2d292cb34db8a8f13268f7009a1bd0b2546fe43d1f", kill_on_drop: false }`
[INFO] [stdout] c0a022ad8db9053bcbb17f2d292cb34db8a8f13268f7009a1bd0b2546fe43d1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28f39e06f91ff1bea2bde445cce96efbff252b69806462f725058c6c72833ac5
[INFO] running `Command { std: "docker" "start" "-a" "28f39e06f91ff1bea2bde445cce96efbff252b69806462f725058c6c72833ac5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[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 inotify v0.7.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling regex v1.5.5
[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 serde_json v1.0.81
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v5.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.37s
[INFO] running `Command { std: "docker" "inspect" "28f39e06f91ff1bea2bde445cce96efbff252b69806462f725058c6c72833ac5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28f39e06f91ff1bea2bde445cce96efbff252b69806462f725058c6c72833ac5", kill_on_drop: false }`
[INFO] [stdout] 28f39e06f91ff1bea2bde445cce96efbff252b69806462f725058c6c72833ac5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3178a42706b8c27e116daa60c3f23a9e2a7804db50643ef035bc707f8a25218f
[INFO] running `Command { std: "docker" "start" "-a" "3178a42706b8c27e116daa60c3f23a9e2a7804db50643ef035bc707f8a25218f", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[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 v5.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.91s
[INFO] running `Command { std: "docker" "inspect" "3178a42706b8c27e116daa60c3f23a9e2a7804db50643ef035bc707f8a25218f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3178a42706b8c27e116daa60c3f23a9e2a7804db50643ef035bc707f8a25218f", kill_on_drop: false }`
[INFO] [stdout] 3178a42706b8c27e116daa60c3f23a9e2a7804db50643ef035bc707f8a25218f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5321fd941d80a293f80868abd92b86b8b3cac3e19406a1d928f317c5cd774bb5
[INFO] running `Command { std: "docker" "start" "-a" "5321fd941d80a293f80868abd92b86b8b3cac3e19406a1d928f317c5cd774bb5", 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-244899ca28710220)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_clean ... FAILED
[INFO] [stdout] test exercise::test::test_exercise_with_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs: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:     0x5d638982aca2 - std::backtrace_rs::backtrace::libunwind::trace::h8d95625898284e7d
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5d638982aca2 - std::backtrace_rs::backtrace::trace_unsynchronized::h9eafd5c61303e492
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5d638982aca2 - std::sys::backtrace::_print_fmt::hec2578e807cc4a3f
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5d638982aca2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hd8ebefbbcb1fe23a
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5d6389852833 - core::fmt::rt::Argument::fmt::h09f3c4b7b5ff5386
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/rt.rs:185:76
[INFO] [stdout]    5:     0x5d6389852833 - core::fmt::write::hef9d041e1d5d9592
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/mod.rs:1449:21
[INFO] [stdout]    6:     0x5d6389827973 - std::io::Write::write_fmt::h7cfb9383e0a29362
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/io/mod.rs:1890:15
[INFO] [stdout]    7:     0x5d638982aaf2 - std::sys::backtrace::BacktraceLock::print::h263d323f217ce3a7
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5d638982c14a - std::panicking::default_hook::{{closure}}::h25050253f7dc0d3e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:298:22
[INFO] [stdout]    9:     0x5d638982bf39 - std::panicking::default_hook::hf3291a4c87ea2887
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:322:9
[INFO] [stdout]   10:     0x5d63896c8357 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h51204ed24e282361
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   11:     0x5d63896c8357 - test::test_main::{{closure}}::h3588678a150ab7c4
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:136:21
[INFO] [stdout]   12:     0x5d638982cc33 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h95d63edfac47e230
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   13:     0x5d638982cc33 - std::panicking::rust_panic_with_hook::h3550dbeaa1041124
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:839:13
[INFO] [stdout]   14:     0x5d638982c8ea - std::panicking::begin_panic_handler::{{closure}}::hde0dd646a9e2b5b7
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:704:13
[INFO] [stdout]   15:     0x5d638982b199 - std::sys::backtrace::__rust_end_short_backtrace::haeb22ba48b4d728e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x5d638982c57d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:695:5
[INFO] [stdout]   17:     0x5d6389851230 - core::panicking::panic_fmt::hca923aa694825dc3
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x5d63898516d6 - core::result::unwrap_failed::h1fd41ecb05679f50
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/result.rs:1704:5
[INFO] [stdout]   19:     0x5d63896873fc - core::result::Result<T,E>::unwrap::heb04085a997f2f4a
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/result.rs:1109:23
[INFO] [stdout]   20:     0x5d63896873fc - rustlings::exercise::test::test_clean::h94302b731bba1e2b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:273:9
[INFO] [stdout]   21:     0x5d6389687337 - rustlings::exercise::test::test_clean::{{closure}}::h300d435c43b016fa
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:272:20
[INFO] [stdout]   22:     0x5d6389684c36 - core::ops::function::FnOnce::call_once::h16d08581eeb4567f
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5d63896cdc3b - core::ops::function::FnOnce::call_once::hbd335dbb4bb5fce4
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5d63896cdc3b - test::__rust_begin_short_backtrace::h04cc5e3b375a80f9
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:638:18
[INFO] [stdout]   25:     0x5d63896cccf5 - test::run_test_in_process::{{closure}}::h820e05c00a84ca94
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:661:60
[INFO] [stdout]   26:     0x5d63896cccf5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5d54c80bc199f62c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5d63896cccf5 - std::panicking::try::do_call::h832d61a9fc2b6e3e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stdout]   28:     0x5d63896cccf5 - std::panicking::try::h9a404c5f3a090501
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stdout]   29:     0x5d63896cccf5 - std::panic::catch_unwind::hf5157d4c366d9053
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x5d63896cccf5 - test::run_test_in_process::h671deca6957ee157
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:661:27
[INFO] [stdout]   31:     0x5d63896cccf5 - test::run_test::{{closure}}::h8a18e214254d2663
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:582:43
[INFO] [stdout]   32:     0x5d638968fce4 - test::run_test::{{closure}}::ha2abac7cc0a13c10
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:612:41
[INFO] [stdout]   33:     0x5d638968fce4 - std::sys::backtrace::__rust_begin_short_backtrace::h013f8b8ca29e5f67
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x5d638969381a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc0336636a8c55b05
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   35:     0x5d638969381a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h256d9472a72a8c66
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5d638969381a - std::panicking::try::do_call::hf49ea3ffcc3bd1db
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stdout]   37:     0x5d638969381a - std::panicking::try::h2a067a3336161e1c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stdout]   38:     0x5d638969381a - std::panic::catch_unwind::h931ea2a9df59b7fa
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x5d638969381a - std::thread::Builder::spawn_unchecked_::{{closure}}::haf08f1439431615c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   40:     0x5d638969381a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd1dc5dd1edff0233
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5d63898303ab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6ad22f40418d409
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   42:     0x5d63898303ab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h734c3e370b18da4b
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   43:     0x5d63898303ab - std::sys::pal::unix::thread::Thread::new::thread_start::hfbde3a90511cd82d
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/pal/unix/thread.rs:109:17
[INFO] [stdout]   44:     0x77d872143ac3 - <unknown>
[INFO] [stdout]   45:     0x77d8721d4a04 - 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/./rmeta8Caco6\"\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:     0x5d638982aca2 - std::backtrace_rs::backtrace::libunwind::trace::h8d95625898284e7d
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5d638982aca2 - std::backtrace_rs::backtrace::trace_unsynchronized::h9eafd5c61303e492
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5d638982aca2 - std::sys::backtrace::_print_fmt::hec2578e807cc4a3f
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5d638982aca2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hd8ebefbbcb1fe23a
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5d6389852833 - core::fmt::rt::Argument::fmt::h09f3c4b7b5ff5386
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/rt.rs:185:76
[INFO] [stdout]    5:     0x5d6389852833 - core::fmt::write::hef9d041e1d5d9592
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/mod.rs:1449:21
[INFO] [stdout]    6:     0x5d6389827973 - std::io::Write::write_fmt::h7cfb9383e0a29362
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/io/mod.rs:1890:15
[INFO] [stdout]    7:     0x5d638982aaf2 - std::sys::backtrace::BacktraceLock::print::h263d323f217ce3a7
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5d638982c14a - std::panicking::default_hook::{{closure}}::h25050253f7dc0d3e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:298:22
[INFO] [stdout]    9:     0x5d638982bf39 - std::panicking::default_hook::hf3291a4c87ea2887
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:322:9
[INFO] [stdout]   10:     0x5d63896c8357 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h51204ed24e282361
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   11:     0x5d63896c8357 - test::test_main::{{closure}}::h3588678a150ab7c4
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:136:21
[INFO] [stdout]   12:     0x5d638982cc33 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h95d63edfac47e230
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   13:     0x5d638982cc33 - std::panicking::rust_panic_with_hook::h3550dbeaa1041124
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:839:13
[INFO] [stdout]   14:     0x5d638982c8ea - std::panicking::begin_panic_handler::{{closure}}::hde0dd646a9e2b5b7
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:704:13
[INFO] [stdout]   15:     0x5d638982b199 - std::sys::backtrace::__rust_end_short_backtrace::haeb22ba48b4d728e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x5d638982c57d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:695:5
[INFO] [stdout]   17:     0x5d6389851230 - core::panicking::panic_fmt::hca923aa694825dc3
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x5d63898516d6 - core::result::unwrap_failed::h1fd41ecb05679f50
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/result.rs:1704:5
[INFO] [stdout]   19:     0x5d6389688296 - core::result::Result<T,E>::unwrap::h93ebc84263ec19ef
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/result.rs:1109:23
[INFO] [stdout]   20:     0x5d6389688296 - rustlings::exercise::test::test_exercise_with_output::hbd8f7e24e390798b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:346:19
[INFO] [stdout]   21:     0x5d6389688097 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h1095e695e951f323
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:339:35
[INFO] [stdout]   22:     0x5d6389684d46 - core::ops::function::FnOnce::call_once::hd2308631f1ccaf2a
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5d63896cdc3b - core::ops::function::FnOnce::call_once::hbd335dbb4bb5fce4
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5d63896cdc3b - test::__rust_begin_short_backtrace::h04cc5e3b375a80f9
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:638:18
[INFO] [stdout]   25:     0x5d63896cccf5 - test::run_test_in_process::{{closure}}::h820e05c00a84ca94
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:661:60
[INFO] [stdout]   26:     0x5d63896cccf5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5d54c80bc199f62c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5d63896cccf5 - std::panicking::try::do_call::h832d61a9fc2b6e3e
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stdout]   28:     0x5d63896cccf5 - std::panicking::try::h9a404c5f3a090501
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stdout]   29:     0x5d63896cccf5 - std::panic::catch_unwind::hf5157d4c366d9053
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x5d63896cccf5 - test::run_test_in_process::h671deca6957ee157
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:661:27
[INFO] [stdout]   31:     0x5d63896cccf5 - test::run_test::{{closure}}::h8a18e214254d2663
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:582:43
[INFO] [stdout]   32:     0x5d638968fce4 - test::run_test::{{closure}}::ha2abac7cc0a13c10
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/test/src/lib.rs:612:41
[INFO] [stdout]   33:     0x5d638968fce4 - std::sys::backtrace::__rust_begin_short_backtrace::h013f8b8ca29e5f67
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x5d638969381a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc0336636a8c55b05
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   35:     0x5d638969381a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h256d9472a72a8c66
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5d638969381a - std::panicking::try::do_call::hf49ea3ffcc3bd1db
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stdout]   37:     0x5d638969381a - std::panicking::try::h2a067a3336161e1c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stdout]   38:     0x5d638969381a - std::panic::catch_unwind::h931ea2a9df59b7fa
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x5d638969381a - std::thread::Builder::spawn_unchecked_::{{closure}}::haf08f1439431615c
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   40:     0x5d638969381a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd1dc5dd1edff0233
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5d63898303ab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6ad22f40418d409
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   42:     0x5d63898303ab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h734c3e370b18da4b
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   43:     0x5d63898303ab - std::sys::pal::unix::thread::Thread::new::thread_start::hfbde3a90511cd82d
[INFO] [stdout]                                at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/pal/unix/thread.rs:109:17
[INFO] [stdout]   44:     0x77d872143ac3 - <unknown>
[INFO] [stdout]   45:     0x77d8721d4a04 - 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 0.11s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "5321fd941d80a293f80868abd92b86b8b3cac3e19406a1d928f317c5cd774bb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5321fd941d80a293f80868abd92b86b8b3cac3e19406a1d928f317c5cd774bb5", kill_on_drop: false }`
[INFO] [stdout] 5321fd941d80a293f80868abd92b86b8b3cac3e19406a1d928f317c5cd774bb5