[INFO] cloning repository https://github.com/wulawulu/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wulawulu/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulawulu%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulawulu%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ad8876d082771d3c453d8e4cb62b57599fa8414
[INFO] testing wulawulu/rustlings against master#414482f6a0d4e7290f614300581a0b55442552a3 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulawulu%2Frustlings" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wulawulu/rustlings on toolchain 414482f6a0d4e7290f614300581a0b55442552a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wulawulu/rustlings
[INFO] finished tweaking git repo https://github.com/wulawulu/rustlings
[INFO] tweaked toml for git repo https://github.com/wulawulu/rustlings written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wulawulu/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" "+414482f6a0d4e7290f614300581a0b55442552a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac4b0fac4f5468141c3f2844d6cf8238e1ad761f9f104a65db50a28186999faa
[INFO] running `Command { std: "docker" "start" "-a" "ac4b0fac4f5468141c3f2844d6cf8238e1ad761f9f104a65db50a28186999faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac4b0fac4f5468141c3f2844d6cf8238e1ad761f9f104a65db50a28186999faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac4b0fac4f5468141c3f2844d6cf8238e1ad761f9f104a65db50a28186999faa", kill_on_drop: false }`
[INFO] [stdout] ac4b0fac4f5468141c3f2844d6cf8238e1ad761f9f104a65db50a28186999faa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 785cbf9624c28d165b9025518bca2a59697063c1b0684ee63b18cc8f68b6a6a8
[INFO] running `Command { std: "docker" "start" "-a" "785cbf9624c28d165b9025518bca2a59697063c1b0684ee63b18cc8f68b6a6a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
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[INFO] [stderr]    Compiling argh v0.1.10
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.21s
[INFO] running `Command { std: "docker" "inspect" "785cbf9624c28d165b9025518bca2a59697063c1b0684ee63b18cc8f68b6a6a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "785cbf9624c28d165b9025518bca2a59697063c1b0684ee63b18cc8f68b6a6a8", kill_on_drop: false }`
[INFO] [stdout] 785cbf9624c28d165b9025518bca2a59697063c1b0684ee63b18cc8f68b6a6a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7257327d49a5127d55b396c012f304ec9781165af3ee38c7f92c9cf3e324cc3
[INFO] running `Command { std: "docker" "start" "-a" "a7257327d49a5127d55b396c012f304ec9781165af3ee38c7f92c9cf3e324cc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.9
[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 v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "a7257327d49a5127d55b396c012f304ec9781165af3ee38c7f92c9cf3e324cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7257327d49a5127d55b396c012f304ec9781165af3ee38c7f92c9cf3e324cc3", kill_on_drop: false }`
[INFO] [stdout] a7257327d49a5127d55b396c012f304ec9781165af3ee38c7f92c9cf3e324cc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 95ef12ff050184c6064104bf5060748497a887ea907a09489021f1b56ec82670
[INFO] running `Command { std: "docker" "start" "-a" "95ef12ff050184c6064104bf5060748497a887ea907a09489021f1b56ec82670", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-b22e34abeed32dba)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stdout] test exercise::test::test_clean ... FAILED
[INFO] [stdout] test exercise::test::test_exercise_with_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs:273:36:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x60168c2212e2 - std::backtrace_rs::backtrace::libunwind::trace::h2a54ddf40adf8cf8
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x60168c2212e2 - std::backtrace_rs::backtrace::trace_unsynchronized::h332dec2b3594a10b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x60168c2212e2 - std::sys::backtrace::_print_fmt::hcb3dee91dccac105
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x60168c2212e2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h2f02338d4ae6d8b0
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x60168c2460a3 - core::fmt::rt::Argument::fmt::h8705d664b1839d6c
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x60168c2460a3 - core::fmt::write::h5e77c22335cabc7f
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/fmt/mod.rs:1446:25
[INFO] [stdout]    6:     0x60168c21e113 - std::io::default_write_fmt::h5c16109ce8878b06
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x60168c21e113 - std::io::Write::write_fmt::h183cd11c08a12e04
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x60168c221132 - std::sys::backtrace::BacktraceLock::print::hb22254026b13323e
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x60168c22291c - std::panicking::default_hook::{{closure}}::h15ac4e3ee7801be5
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x60168c222772 - std::panicking::default_hook::h15db2a3343942a16
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x60168bfd7474 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha02114eecd5b8f69
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   12:     0x60168bfd7474 - test::test_main_with_exit_callback::{{closure}}::hfb76c9b760818eb2
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x60168c223413 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h325134fa51136753
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   14:     0x60168c223413 - std::panicking::rust_panic_with_hook::h67f3fa85499b6cf9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x60168c2230ca - std::panicking::begin_panic_handler::{{closure}}::h40a30e994b26720e
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x60168c2217e9 - std::sys::backtrace::__rust_end_short_backtrace::hb5bcb2f6ea295c8b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x60168c222d5d - __rustc[bf3627c2b8b7eae9]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x60168c244800 - core::panicking::panic_fmt::h20722ae9d0312a90
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x60168c244c66 - core::result::unwrap_failed::h3a549f59308089dd
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/result.rs:1732:5
[INFO] [stdout]   20:     0x60168bf911cc - core::result::Result<T,E>::unwrap::hcb6da709b4d86f5f
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/result.rs:1137:23
[INFO] [stdout]   21:     0x60168bf911cc - rustlings::exercise::test::test_clean::h626ad17e1670f35c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:273:9
[INFO] [stdout]   22:     0x60168bf91107 - rustlings::exercise::test::test_clean::{{closure}}::h9ad3753b4b67e695
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:272:20
[INFO] [stdout]   23:     0x60168bf93016 - core::ops::function::FnOnce::call_once::hf1cb4c7f634aeb57
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x60168bfdcc2b - core::ops::function::FnOnce::call_once::h57f6f31c364c320b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x60168bfdcc2b - test::__rust_begin_short_backtrace::h517520f4c2bfc013
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x60168bfdbe82 - test::run_test_in_process::{{closure}}::h0914ac5f2719bf90
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:671:60
[INFO] [stdout]   27:     0x60168bfdbe82 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h6fe627a8560ee122
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x60168bfdbe82 - std::panicking::try::do_call::h8e4a522b2d07b5d9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x60168bfdbe82 - std::panicking::try::h254b443d279d1f8a
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x60168bfdbe82 - std::panic::catch_unwind::he39107e495b94aed
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x60168bfdbe82 - test::run_test_in_process::hb9053e7102e6de40
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x60168bfdbe82 - test::run_test::{{closure}}::hed53f683e9967fc9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x60168bf9f274 - test::run_test::{{closure}}::h1b1395a97621c24c
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x60168bf9f274 - std::sys::backtrace::__rust_begin_short_backtrace::hd15d7342920b94e4
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x60168bfa2c9a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hf7d3403d2a997ad4
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x60168bfa2c9a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h804cb151403aed57
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x60168bfa2c9a - std::panicking::try::do_call::h83a3328114f83651
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x60168bfa2c9a - std::panicking::try::h5371451a86d476d0
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x60168bfa2c9a - std::panic::catch_unwind::h2d1b89e7535ca74a
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x60168bfa2c9a - std::thread::Builder::spawn_unchecked_::{{closure}}::h169c242c7f876b92
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x60168bfa2c9a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4115e0f997976371
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x60168c224cbb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbc3fa83432d7fd73
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   43:     0x60168c224cbb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::heba5519d10f2c030
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   44:     0x60168c224cbb - std::sys::pal::unix::thread::Thread::new::thread_start::h211a36f354245501
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   45:     0x78589fbd4aa4 - <unknown>
[INFO] [stdout]   46:     0x78589fc61a34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs:346:38:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetadpG5ZC\"\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:     0x60168c2212e2 - std::backtrace_rs::backtrace::libunwind::trace::h2a54ddf40adf8cf8
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x60168c2212e2 - std::backtrace_rs::backtrace::trace_unsynchronized::h332dec2b3594a10b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x60168c2212e2 - std::sys::backtrace::_print_fmt::hcb3dee91dccac105
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x60168c2212e2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h2f02338d4ae6d8b0
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x60168c2460a3 - core::fmt::rt::Argument::fmt::h8705d664b1839d6c
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x60168c2460a3 - core::fmt::write::h5e77c22335cabc7f
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/fmt/mod.rs:1446:25
[INFO] [stdout]    6:     0x60168c21e113 - std::io::default_write_fmt::h5c16109ce8878b06
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x60168c21e113 - std::io::Write::write_fmt::h183cd11c08a12e04
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/io/mod.rs:1914:13
[INFO] [stdout]    8:     0x60168c221132 - std::sys::backtrace::BacktraceLock::print::hb22254026b13323e
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x60168c22291c - std::panicking::default_hook::{{closure}}::h15ac4e3ee7801be5
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:300:22
[INFO] [stdout]   10:     0x60168c222772 - std::panicking::default_hook::h15db2a3343942a16
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x60168bfd7474 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha02114eecd5b8f69
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   12:     0x60168bfd7474 - test::test_main_with_exit_callback::{{closure}}::hfb76c9b760818eb2
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x60168c223413 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h325134fa51136753
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1980:9
[INFO] [stdout]   14:     0x60168c223413 - std::panicking::rust_panic_with_hook::h67f3fa85499b6cf9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x60168c2230ca - std::panicking::begin_panic_handler::{{closure}}::h40a30e994b26720e
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x60168c2217e9 - std::sys::backtrace::__rust_end_short_backtrace::hb5bcb2f6ea295c8b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x60168c222d5d - __rustc[bf3627c2b8b7eae9]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x60168c244800 - core::panicking::panic_fmt::h20722ae9d0312a90
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x60168c244c66 - core::result::unwrap_failed::h3a549f59308089dd
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/result.rs:1732:5
[INFO] [stdout]   20:     0x60168bf92066 - core::result::Result<T,E>::unwrap::ha2502fb8ec4dc6ef
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/result.rs:1137:23
[INFO] [stdout]   21:     0x60168bf92066 - rustlings::exercise::test::test_exercise_with_output::hd9a9cad892acf2eb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:346:19
[INFO] [stdout]   22:     0x60168bf91e67 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::ha822e91e5cc3e1a5
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:339:35
[INFO] [stdout]   23:     0x60168bf92f06 - core::ops::function::FnOnce::call_once::hc4e45947c735259c
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x60168bfdcc2b - core::ops::function::FnOnce::call_once::h57f6f31c364c320b
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x60168bfdcc2b - test::__rust_begin_short_backtrace::h517520f4c2bfc013
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x60168bfdbe82 - test::run_test_in_process::{{closure}}::h0914ac5f2719bf90
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:671:60
[INFO] [stdout]   27:     0x60168bfdbe82 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h6fe627a8560ee122
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x60168bfdbe82 - std::panicking::try::do_call::h8e4a522b2d07b5d9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x60168bfdbe82 - std::panicking::try::h254b443d279d1f8a
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x60168bfdbe82 - std::panic::catch_unwind::he39107e495b94aed
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x60168bfdbe82 - test::run_test_in_process::hb9053e7102e6de40
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x60168bfdbe82 - test::run_test::{{closure}}::hed53f683e9967fc9
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x60168bf9f274 - test::run_test::{{closure}}::h1b1395a97621c24c
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x60168bf9f274 - std::sys::backtrace::__rust_begin_short_backtrace::hd15d7342920b94e4
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x60168bfa2c9a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hf7d3403d2a997ad4
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x60168bfa2c9a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h804cb151403aed57
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x60168bfa2c9a - std::panicking::try::do_call::h83a3328114f83651
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x60168bfa2c9a - std::panicking::try::h5371451a86d476d0
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x60168bfa2c9a - std::panic::catch_unwind::h2d1b89e7535ca74a
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x60168bfa2c9a - std::thread::Builder::spawn_unchecked_::{{closure}}::h169c242c7f876b92
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x60168bfa2c9a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4115e0f997976371
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x60168c224cbb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbc3fa83432d7fd73
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   43:     0x60168c224cbb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::heba5519d10f2c030
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/alloc/src/boxed.rs:1966:9
[INFO] [stdout]   44:     0x60168c224cbb - std::sys::pal::unix::thread::Thread::new::thread_start::h211a36f354245501
[INFO] [stdout]                                at /rustc/414482f6a0d4e7290f614300581a0b55442552a3/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   45:     0x78589fbd4aa4 - <unknown>
[INFO] [stdout]   46:     0x78589fc61a34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout]     exercise::test::test_exercise_with_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.14s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "95ef12ff050184c6064104bf5060748497a887ea907a09489021f1b56ec82670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95ef12ff050184c6064104bf5060748497a887ea907a09489021f1b56ec82670", kill_on_drop: false }`
[INFO] [stdout] 95ef12ff050184c6064104bf5060748497a887ea907a09489021f1b56ec82670