[INFO] cloning repository https://github.com/JMariadlcs/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JMariadlcs/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMariadlcs%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMariadlcs%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 692e32a7f41095070d30d563ed81c9e870cbbeef
[INFO] testing JMariadlcs/rustlings/692e32a7f41095070d30d563ed81c9e870cbbeef against master#61223975d46f794466efa832bc7562b9707ecc46+rustflags=-Copt-level=3 for pr-121282
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMariadlcs%2Frustlings" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JMariadlcs/rustlings on toolchain 61223975d46f794466efa832bc7562b9707ecc46
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JMariadlcs/rustlings
[INFO] finished tweaking git repo https://github.com/JMariadlcs/rustlings
[INFO] tweaked toml for git repo https://github.com/JMariadlcs/rustlings written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/JMariadlcs/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" "+61223975d46f794466efa832bc7562b9707ecc46" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6260b6eaeaac01fa1cbe3a092623bdd1fcf7ac18707578014cf2d3fafe10bf0b
[INFO] running `Command { std: "docker" "start" "-a" "6260b6eaeaac01fa1cbe3a092623bdd1fcf7ac18707578014cf2d3fafe10bf0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6260b6eaeaac01fa1cbe3a092623bdd1fcf7ac18707578014cf2d3fafe10bf0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6260b6eaeaac01fa1cbe3a092623bdd1fcf7ac18707578014cf2d3fafe10bf0b", kill_on_drop: false }`
[INFO] [stdout] 6260b6eaeaac01fa1cbe3a092623bdd1fcf7ac18707578014cf2d3fafe10bf0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid -Copt-level=3" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1b1ce9f89d6cae1ec30620adde354a63f38110b4ede726ad2978b4d63842170
[INFO] running `Command { std: "docker" "start" "-a" "a1b1ce9f89d6cae1ec30620adde354a63f38110b4ede726ad2978b4d63842170", 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 serde_derive v1.0.129
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling net2 v0.2.37
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[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 quote v1.0.9
[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 console v0.15.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v5.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 38.25s
[INFO] running `Command { std: "docker" "inspect" "a1b1ce9f89d6cae1ec30620adde354a63f38110b4ede726ad2978b4d63842170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1b1ce9f89d6cae1ec30620adde354a63f38110b4ede726ad2978b4d63842170", kill_on_drop: false }`
[INFO] [stdout] a1b1ce9f89d6cae1ec30620adde354a63f38110b4ede726ad2978b4d63842170
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid -Copt-level=3" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c8743d35b311e2926d950fc913ef3ccd6ec955a3802f43a92ea339edf462414
[INFO] running `Command { std: "docker" "start" "-a" "8c8743d35b311e2926d950fc913ef3ccd6ec955a3802f43a92ea339edf462414", kill_on_drop: false }`
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[INFO] [stderr]    Compiling predicates v1.0.8
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v5.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 8.64s
[INFO] running `Command { std: "docker" "inspect" "8c8743d35b311e2926d950fc913ef3ccd6ec955a3802f43a92ea339edf462414", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c8743d35b311e2926d950fc913ef3ccd6ec955a3802f43a92ea339edf462414", kill_on_drop: false }`
[INFO] [stdout] 8c8743d35b311e2926d950fc913ef3ccd6ec955a3802f43a92ea339edf462414
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid -Copt-level=3" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 38eb4608d50182241d60e4831b617efca1794a187ed6ae373f981f05a166a039
[INFO] running `Command { std: "docker" "start" "-a" "38eb4608d50182241d60e4831b617efca1794a187ed6ae373f981f05a166a039", 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-77b0ddad1ddbf7fd)
[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] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs:269:36:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55e2e28f9d46 - std::backtrace_rs::backtrace::libunwind::trace::h68e08e31a5edd928
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x55e2e28f9d46 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8e4d3186f828cab
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55e2e28f9d46 - std::sys_common::backtrace::_print_fmt::hdcdca1c0665ccefc
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55e2e28f9d46 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h752651e67cc277a4
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55e2e292183c - core::fmt::rt::Argument::fmt::h4e7c3e22f7386287
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x55e2e292183c - core::fmt::write::hd44b1d45ba162e21
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x55e2e28f75ef - std::io::Write::write_fmt::hdb67a49a0754f939
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/io/mod.rs:1846:15
[INFO] [stdout]    7:     0x55e2e28f9af4 - std::sys_common::backtrace::_print::hbca331de1381491f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55e2e28f9af4 - std::sys_common::backtrace::print::hade58077d78c625d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55e2e28fb7eb - std::panicking::default_hook::{{closure}}::hc9f80a2cdc6be4c4
[INFO] [stdout]   10:     0x55e2e28fb4bd - std::panicking::default_hook::h1fc68886dc215416
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x55e2e285ba67 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha16821620acc0367
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2030:9
[INFO] [stdout]   12:     0x55e2e285ba67 - test::test_main::{{closure}}::h1a3ed7cd910c2945
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55e2e28fbe20 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he260753ff79c0e70
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2030:9
[INFO] [stdout]   14:     0x55e2e28fbe20 - std::panicking::rust_panic_with_hook::heff73da0ddd67492
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:786:13
[INFO] [stdout]   15:     0x55e2e28fbb62 - std::panicking::begin_panic_handler::{{closure}}::h141137f9c7de1e02
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:660:13
[INFO] [stdout]   16:     0x55e2e28fa226 - std::sys_common::backtrace::__rust_end_short_backtrace::hbde4e66d30db627d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55e2e28fb894 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:648:5
[INFO] [stdout]   18:     0x55e2e2821115 - core::panicking::panic_fmt::h92fcc83e4972ca9b
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55e2e2821603 - core::result::unwrap_failed::h788f2905cd2dc947
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/result.rs:1653:5
[INFO] [stdout]   20:     0x55e2e2821fe8 - core::result::Result<T,E>::unwrap::h39d26eb2cdd64bca
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55e2e2821fe8 - rustlings::exercise::test::test_clean::hdbf59b31fbe60bcf
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   22:     0x55e2e2826e99 - rustlings::exercise::test::test_clean::{{closure}}::h622681ee44ea1600
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   23:     0x55e2e2826e99 - core::ops::function::FnOnce::call_once::hce4b513332adc6c7
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55e2e28611cf - core::ops::function::FnOnce::call_once::hb5d425830acba2e8
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55e2e28611cf - test::__rust_begin_short_backtrace::h8054e86d0f5ccc86
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:620:18
[INFO] [stdout]   26:     0x55e2e285fde0 - test::run_test_in_process::{{closure}}::h85d13cb166c10721
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:643:60
[INFO] [stdout]   27:     0x55e2e285fde0 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc3dc86b8d5205a04
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55e2e285fde0 - std::panicking::try::do_call::hc17666b06748adad
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:555:40
[INFO] [stdout]   29:     0x55e2e285fde0 - std::panicking::try::h1e9fba0c97684d1d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:519:19
[INFO] [stdout]   30:     0x55e2e285fde0 - std::panic::catch_unwind::h8328c2da9899627c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55e2e285fde0 - test::run_test_in_process::hf19a99f254958c9c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:643:27
[INFO] [stdout]   32:     0x55e2e285fde0 - test::run_test::{{closure}}::hba6ab6b94e515411
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:566:43
[INFO] [stdout]   33:     0x55e2e2828123 - test::run_test::{{closure}}::h6ac7c2253cb9cc0f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:594:41
[INFO] [stdout]   34:     0x55e2e2828123 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb4fbc53b7e758a6f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x55e2e282ce4f - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha24970823708ac98
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/thread/mod.rs:528:17
[INFO] [stdout]   36:     0x55e2e282ce4f - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h16db0733eff2a03c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55e2e282ce4f - std::panicking::try::do_call::hc2890dbc9a490eee
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:555:40
[INFO] [stdout]   38:     0x55e2e282ce4f - std::panicking::try::ha67ad75b01f98422
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:519:19
[INFO] [stdout]   39:     0x55e2e282ce4f - std::panic::catch_unwind::h26725df9ddb3fcd2
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x55e2e282ce4f - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0e59407b0ff3ed8
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/thread/mod.rs:527:30
[INFO] [stdout]   41:     0x55e2e282ce4f - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd4eb105f82d3bb8e
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55e2e2900255 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h28564f61ef15890d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2016:9
[INFO] [stdout]   43:     0x55e2e2900255 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h03728738d990d027
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2016:9
[INFO] [stdout]   44:     0x55e2e2900255 - std::sys::pal::unix::thread::Thread::new::thread_start::heb455c9485795637
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f00b3bcaac3 - <unknown>
[INFO] [stdout]   46:     0x7f00b3c5bbf4 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs:342:38:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetaHdzOjr\"\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:     0x55e2e28f9d46 - std::backtrace_rs::backtrace::libunwind::trace::h68e08e31a5edd928
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x55e2e28f9d46 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8e4d3186f828cab
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55e2e28f9d46 - std::sys_common::backtrace::_print_fmt::hdcdca1c0665ccefc
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55e2e28f9d46 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h752651e67cc277a4
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55e2e292183c - core::fmt::rt::Argument::fmt::h4e7c3e22f7386287
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x55e2e292183c - core::fmt::write::hd44b1d45ba162e21
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x55e2e28f75ef - std::io::Write::write_fmt::hdb67a49a0754f939
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/io/mod.rs:1846:15
[INFO] [stdout]    7:     0x55e2e28f9af4 - std::sys_common::backtrace::_print::hbca331de1381491f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55e2e28f9af4 - std::sys_common::backtrace::print::hade58077d78c625d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55e2e28fb7eb - std::panicking::default_hook::{{closure}}::hc9f80a2cdc6be4c4
[INFO] [stdout]   10:     0x55e2e28fb4bd - std::panicking::default_hook::h1fc68886dc215416
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x55e2e285ba67 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha16821620acc0367
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2030:9
[INFO] [stdout]   12:     0x55e2e285ba67 - test::test_main::{{closure}}::h1a3ed7cd910c2945
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55e2e28fbe20 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he260753ff79c0e70
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2030:9
[INFO] [stdout]   14:     0x55e2e28fbe20 - std::panicking::rust_panic_with_hook::heff73da0ddd67492
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:786:13
[INFO] [stdout]   15:     0x55e2e28fbb62 - std::panicking::begin_panic_handler::{{closure}}::h141137f9c7de1e02
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:660:13
[INFO] [stdout]   16:     0x55e2e28fa226 - std::sys_common::backtrace::__rust_end_short_backtrace::hbde4e66d30db627d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55e2e28fb894 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:648:5
[INFO] [stdout]   18:     0x55e2e2821115 - core::panicking::panic_fmt::h92fcc83e4972ca9b
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55e2e2821603 - core::result::unwrap_failed::h788f2905cd2dc947
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/result.rs:1653:5
[INFO] [stdout]   20:     0x55e2e282305b - core::result::Result<T,E>::unwrap::h9bcae50c95029780
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55e2e282305b - rustlings::exercise::test::test_exercise_with_output::hc765bbfdcd754607
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   22:     0x55e2e2826e59 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h1735985dd8579cb6
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   23:     0x55e2e2826e59 - core::ops::function::FnOnce::call_once::h6a3f21a654b2da36
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55e2e28611cf - core::ops::function::FnOnce::call_once::hb5d425830acba2e8
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55e2e28611cf - test::__rust_begin_short_backtrace::h8054e86d0f5ccc86
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:620:18
[INFO] [stdout]   26:     0x55e2e285fde0 - test::run_test_in_process::{{closure}}::h85d13cb166c10721
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:643:60
[INFO] [stdout]   27:     0x55e2e285fde0 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc3dc86b8d5205a04
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55e2e285fde0 - std::panicking::try::do_call::hc17666b06748adad
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:555:40
[INFO] [stdout]   29:     0x55e2e285fde0 - std::panicking::try::h1e9fba0c97684d1d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:519:19
[INFO] [stdout]   30:     0x55e2e285fde0 - std::panic::catch_unwind::h8328c2da9899627c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55e2e285fde0 - test::run_test_in_process::hf19a99f254958c9c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:643:27
[INFO] [stdout]   32:     0x55e2e285fde0 - test::run_test::{{closure}}::hba6ab6b94e515411
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:566:43
[INFO] [stdout]   33:     0x55e2e2828123 - test::run_test::{{closure}}::h6ac7c2253cb9cc0f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/test/src/lib.rs:594:41
[INFO] [stdout]   34:     0x55e2e2828123 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb4fbc53b7e758a6f
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x55e2e282ce4f - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha24970823708ac98
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/thread/mod.rs:528:17
[INFO] [stdout]   36:     0x55e2e282ce4f - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h16db0733eff2a03c
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55e2e282ce4f - std::panicking::try::do_call::hc2890dbc9a490eee
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:555:40
[INFO] [stdout]   38:     0x55e2e282ce4f - std::panicking::try::ha67ad75b01f98422
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panicking.rs:519:19
[INFO] [stdout]   39:     0x55e2e282ce4f - std::panic::catch_unwind::h26725df9ddb3fcd2
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x55e2e282ce4f - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0e59407b0ff3ed8
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/thread/mod.rs:527:30
[INFO] [stdout]   41:     0x55e2e282ce4f - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd4eb105f82d3bb8e
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55e2e2900255 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h28564f61ef15890d
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2016:9
[INFO] [stdout]   43:     0x55e2e2900255 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h03728738d990d027
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/alloc/src/boxed.rs:2016:9
[INFO] [stdout]   44:     0x55e2e2900255 - std::sys::pal::unix::thread::Thread::new::thread_start::heb455c9485795637
[INFO] [stdout]                                at /rustc/61223975d46f794466efa832bc7562b9707ecc46/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f00b3bcaac3 - <unknown>
[INFO] [stdout]   46:     0x7f00b3c5bbf4 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout]     exercise::test::test_exercise_with_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "38eb4608d50182241d60e4831b617efca1794a187ed6ae373f981f05a166a039", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38eb4608d50182241d60e4831b617efca1794a187ed6ae373f981f05a166a039", kill_on_drop: false }`
[INFO] [stdout] 38eb4608d50182241d60e4831b617efca1794a187ed6ae373f981f05a166a039