[INFO] cloning repository https://github.com/pace-noge/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pace-noge/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpace-noge%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpace-noge%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4da9e7ee2908b697ca76a94676fe9680248af7c9
[INFO] testing pace-noge/rustlings against 1.69.0 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpace-noge%2Frustlings" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pace-noge/rustlings on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pace-noge/rustlings
[INFO] finished tweaking git repo https://github.com/pace-noge/rustlings
[INFO] tweaked toml for git repo https://github.com/pace-noge/rustlings written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pace-noge/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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b84c1c392e0e659de6ba4f4d7b1994a83a155d11331f14eac34e3a7ecddad7e2
[INFO] running `Command { std: "docker" "start" "-a" "b84c1c392e0e659de6ba4f4d7b1994a83a155d11331f14eac34e3a7ecddad7e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b84c1c392e0e659de6ba4f4d7b1994a83a155d11331f14eac34e3a7ecddad7e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b84c1c392e0e659de6ba4f4d7b1994a83a155d11331f14eac34e3a7ecddad7e2", kill_on_drop: false }`
[INFO] [stdout] b84c1c392e0e659de6ba4f4d7b1994a83a155d11331f14eac34e3a7ecddad7e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3840b553e8aee17e5ee3d1ff78ac6a0e54931e251ee2be7f3cbe678a4ef53256
[INFO] running `Command { std: "docker" "start" "-a" "3840b553e8aee17e5ee3d1ff78ac6a0e54931e251ee2be7f3cbe678a4ef53256", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
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[INFO] [stderr]    Compiling autocfg v1.0.1
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[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling slab v0.4.3
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling lock_api v0.4.3
[INFO] [stderr]    Compiling serde v1.0.125
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[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling argh_shared v0.1.4
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[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling regex v1.4.6
[INFO] [stderr]    Compiling notify v4.0.16
[INFO] [stderr]    Compiling console v0.14.1
[INFO] [stderr]    Compiling console v0.7.7
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]    Compiling indicatif v0.10.3
[INFO] [stderr]    Compiling argh v0.1.4
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rustlings v4.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.88s
[INFO] running `Command { std: "docker" "inspect" "3840b553e8aee17e5ee3d1ff78ac6a0e54931e251ee2be7f3cbe678a4ef53256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3840b553e8aee17e5ee3d1ff78ac6a0e54931e251ee2be7f3cbe678a4ef53256", kill_on_drop: false }`
[INFO] [stdout] 3840b553e8aee17e5ee3d1ff78ac6a0e54931e251ee2be7f3cbe678a4ef53256
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 649f50a262e3ee4acea283837d0be4b4b39e472041968c2bd6e400a641f1ef36
[INFO] running `Command { std: "docker" "start" "-a" "649f50a262e3ee4acea283837d0be4b4b39e472041968c2bd6e400a641f1ef36", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.2
[INFO] [stderr]    Compiling predicates v1.0.7
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v4.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.69s
[INFO] running `Command { std: "docker" "inspect" "649f50a262e3ee4acea283837d0be4b4b39e472041968c2bd6e400a641f1ef36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "649f50a262e3ee4acea283837d0be4b4b39e472041968c2bd6e400a641f1ef36", kill_on_drop: false }`
[INFO] [stdout] 649f50a262e3ee4acea283837d0be4b4b39e472041968c2bd6e400a641f1ef36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 304f45f87c86bf94a83adfa86e4aff14953eb891fbb81ac5a8615137e244bb3a
[INFO] running `Command { std: "docker" "start" "-a" "304f45f87c86bf94a83adfa86e4aff14953eb891fbb81ac5a8615137e244bb3a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-eca995e80eeee7cf)
[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] thread 'exercise::test::test_clean' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }', src/exercise.rs:270:36
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x564dc605292a - std::backtrace_rs::backtrace::libunwind::trace::ha9053a9a07ca49cb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x564dc605292a - std::backtrace_rs::backtrace::trace_unsynchronized::h9c2852a457ad564e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x564dc605292a - std::sys_common::backtrace::_print_fmt::h457936fbfaa0070f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x564dc605292a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5779d7bf7f70cb0c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x564dc60762be - core::fmt::write::h5a4baaff1bcd3eb5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/fmt/mod.rs:1232:17
[INFO] [stdout]    5:     0x564dc604fd85 - std::io::Write::write_fmt::h478f79c628ef31d1
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/io/mod.rs:1684:15
[INFO] [stdout]    6:     0x564dc60526f5 - std::sys_common::backtrace::_print::h5fcdc36060f177e8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x564dc60526f5 - std::sys_common::backtrace::print::h54ca9458b876c8bf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x564dc60544bf - std::panicking::default_hook::{{closure}}::hbe471161c7664ed6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:271:22
[INFO] [stdout]    9:     0x564dc605417f - std::panicking::default_hook::ha3500da57aa4ac4f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:287:9
[INFO] [stdout]   10:     0x564dc5ec9b87 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdf1b89dd137ece34
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   11:     0x564dc5ec9b87 - test::test_main::{{closure}}::h9081a79f20e75698
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x564dc6054bed - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6507bddc3eebb4a5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   13:     0x564dc6054bed - std::panicking::rust_panic_with_hook::h50c09d000dc561d2
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:696:13
[INFO] [stdout]   14:     0x564dc6054969 - std::panicking::begin_panic_handler::{{closure}}::h9e2b2176e00e0d9c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:583:13
[INFO] [stdout]   15:     0x564dc6052d96 - std::sys_common::backtrace::__rust_end_short_backtrace::h5739b8e512c09d02
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x564dc6054672 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
[INFO] [stdout]   17:     0x564dc5e890d3 - core::panicking::panic_fmt::hf33a1475b4dc5c3e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
[INFO] [stdout]   18:     0x564dc5e89583 - core::result::unwrap_failed::hdff5465d74574b44
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1750:5
[INFO] [stdout]   19:     0x564dc5e95e3b - core::result::Result<T,E>::unwrap::hb3e14df6717c6b4a
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1090:23
[INFO] [stdout]   20:     0x564dc5e8b771 - rustlings::exercise::test::test_clean::h830a76a541b8a326
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:270:9
[INFO] [stdout]   21:     0x564dc5e8b6f7 - rustlings::exercise::test::test_clean::{{closure}}::he2d1ae57aaf5b65d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:21
[INFO] [stdout]   22:     0x564dc5e8e085 - core::ops::function::FnOnce::call_once::h57ae65baa425ae15
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x564dc5ecef6f - core::ops::function::FnOnce::call_once::h7d969581be7d0075
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x564dc5ecef6f - test::__rust_begin_short_backtrace::hca25a52684e56655
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:656:18
[INFO] [stdout]   25:     0x564dc5ea058c - test::run_test::{{closure}}::ha8ac744c4af1a4bb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:647:30
[INFO] [stdout]   26:     0x564dc5ea058c - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7b411a9ed45bdecf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x564dc5ecdf36 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd05328869a8ed200
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   28:     0x564dc5ecdf36 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0c601ce20bd5b2be
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   29:     0x564dc5ecdf36 - std::panicking::try::do_call::ha4be5c164fe30854
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   30:     0x564dc5ecdf36 - std::panicking::try::h604546f3609af05f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   31:     0x564dc5ecdf36 - std::panic::catch_unwind::h5bfa8afe44c9c2f9
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   32:     0x564dc5ecdf36 - test::run_test_in_process::hd50dee55dd63e6aa
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:679:27
[INFO] [stdout]   33:     0x564dc5ecdf36 - test::run_test::run_test_inner::{{closure}}::h4aa0f433aa85cea8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:573:39
[INFO] [stdout]   34:     0x564dc5e9ac01 - test::run_test::run_test_inner::{{closure}}::had56431adf24b4d6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:600:37
[INFO] [stdout]   35:     0x564dc5e9ac01 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha8d9890e0c73bf13
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   36:     0x564dc5ea061b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h251832bcb4a95327
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:560:17
[INFO] [stdout]   37:     0x564dc5ea061b - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8fdff598fa414831
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   38:     0x564dc5ea061b - std::panicking::try::do_call::h455dd2f7764a950f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   39:     0x564dc5ea061b - std::panicking::try::had6f23b7b73ae72a
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   40:     0x564dc5ea061b - std::panic::catch_unwind::ha6a5ca3915b4dad0
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   41:     0x564dc5ea061b - std::thread::Builder::spawn_unchecked_::{{closure}}::h883b72ef75da6231
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   42:     0x564dc5ea061b - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb7dff73dc8bd2ccb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x564dc6059133 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h39990b24eedef2ab
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   44:     0x564dc6059133 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h01a027258444143b
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   45:     0x564dc6059133 - std::sys::unix::thread::Thread::new::thread_start::ha4f1cdd9c25884ba
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   46:     0x7fd3434fdb43 - <unknown>
[INFO] [stdout]   47:     0x7fd34358ebb4 - __clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at '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/./rmetaU6ukiU\"\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 previous error\u{1b}[0m\n\n" }', src/exercise.rs:343:38
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x564dc605292a - std::backtrace_rs::backtrace::libunwind::trace::ha9053a9a07ca49cb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x564dc605292a - std::backtrace_rs::backtrace::trace_unsynchronized::h9c2852a457ad564e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x564dc605292a - std::sys_common::backtrace::_print_fmt::h457936fbfaa0070f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x564dc605292a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5779d7bf7f70cb0c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x564dc60762be - core::fmt::write::h5a4baaff1bcd3eb5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/fmt/mod.rs:1232:17
[INFO] [stdout]    5:     0x564dc604fd85 - std::io::Write::write_fmt::h478f79c628ef31d1
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/io/mod.rs:1684:15
[INFO] [stdout]    6:     0x564dc60526f5 - std::sys_common::backtrace::_print::h5fcdc36060f177e8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x564dc60526f5 - std::sys_common::backtrace::print::h54ca9458b876c8bf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x564dc60544bf - std::panicking::default_hook::{{closure}}::hbe471161c7664ed6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:271:22
[INFO] [stdout]    9:     0x564dc605417f - std::panicking::default_hook::ha3500da57aa4ac4f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:287:9
[INFO] [stdout]   10:     0x564dc5ec9b87 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdf1b89dd137ece34
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   11:     0x564dc5ec9b87 - test::test_main::{{closure}}::h9081a79f20e75698
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x564dc6054bed - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6507bddc3eebb4a5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   13:     0x564dc6054bed - std::panicking::rust_panic_with_hook::h50c09d000dc561d2
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:696:13
[INFO] [stdout]   14:     0x564dc6054969 - std::panicking::begin_panic_handler::{{closure}}::h9e2b2176e00e0d9c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:583:13
[INFO] [stdout]   15:     0x564dc6052d96 - std::sys_common::backtrace::__rust_end_short_backtrace::h5739b8e512c09d02
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x564dc6054672 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
[INFO] [stdout]   17:     0x564dc5e890d3 - core::panicking::panic_fmt::hf33a1475b4dc5c3e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
[INFO] [stdout]   18:     0x564dc5e89583 - core::result::unwrap_failed::hdff5465d74574b44
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1750:5
[INFO] [stdout]   19:     0x564dc5e95cdb - core::result::Result<T,E>::unwrap::h8f1540ca85a68e95
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1090:23
[INFO] [stdout]   20:     0x564dc5e8c3c1 - rustlings::exercise::test::test_exercise_with_output::h41e2a20757b6e16a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:343:19
[INFO] [stdout]   21:     0x564dc5e8c257 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hcdd9c19e486848af
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:336:36
[INFO] [stdout]   22:     0x564dc5e8e145 - core::ops::function::FnOnce::call_once::hcd769cced6400334
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x564dc5ecef6f - core::ops::function::FnOnce::call_once::h7d969581be7d0075
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x564dc5ecef6f - test::__rust_begin_short_backtrace::hca25a52684e56655
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:656:18
[INFO] [stdout]   25:     0x564dc5ea058c - test::run_test::{{closure}}::ha8ac744c4af1a4bb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:647:30
[INFO] [stdout]   26:     0x564dc5ea058c - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7b411a9ed45bdecf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x564dc5ecdf36 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd05328869a8ed200
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   28:     0x564dc5ecdf36 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0c601ce20bd5b2be
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   29:     0x564dc5ecdf36 - std::panicking::try::do_call::ha4be5c164fe30854
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   30:     0x564dc5ecdf36 - std::panicking::try::h604546f3609af05f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   31:     0x564dc5ecdf36 - std::panic::catch_unwind::h5bfa8afe44c9c2f9
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   32:     0x564dc5ecdf36 - test::run_test_in_process::hd50dee55dd63e6aa
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:679:27
[INFO] [stdout]   33:     0x564dc5ecdf36 - test::run_test::run_test_inner::{{closure}}::h4aa0f433aa85cea8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:573:39
[INFO] [stdout]   34:     0x564dc5e9ac01 - test::run_test::run_test_inner::{{closure}}::had56431adf24b4d6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:600:37
[INFO] [stdout]   35:     0x564dc5e9ac01 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha8d9890e0c73bf13
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   36:     0x564dc5ea061b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h251832bcb4a95327
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:560:17
[INFO] [stdout]   37:     0x564dc5ea061b - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8fdff598fa414831
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   38:     0x564dc5ea061b - std::panicking::try::do_call::h455dd2f7764a950f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   39:     0x564dc5ea061b - std::panicking::try::had6f23b7b73ae72a
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   40:     0x564dc5ea061b - std::panic::catch_unwind::ha6a5ca3915b4dad0
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   41:     0x564dc5ea061b - std::thread::Builder::spawn_unchecked_::{{closure}}::h883b72ef75da6231
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   42:     0x564dc5ea061b - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb7dff73dc8bd2ccb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x564dc6059133 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h39990b24eedef2ab
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   44:     0x564dc6059133 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h01a027258444143b
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   45:     0x564dc6059133 - std::sys::unix::thread::Thread::new::thread_start::ha4f1cdd9c25884ba
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   46:     0x7fd3434fdb43 - <unknown>
[INFO] [stdout]   47:     0x7fd34358ebb4 - __clone
[INFO] [stdout]   48:                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 0.06s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "304f45f87c86bf94a83adfa86e4aff14953eb891fbb81ac5a8615137e244bb3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "304f45f87c86bf94a83adfa86e4aff14953eb891fbb81ac5a8615137e244bb3a", kill_on_drop: false }`
[INFO] [stdout] 304f45f87c86bf94a83adfa86e4aff14953eb891fbb81ac5a8615137e244bb3a
