[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/learn_rust_rustlings-Wzzzx" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Wzzzx", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Wzzzx'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d4639b322116f0d11277056c8eeb09d182820a4
[INFO] testing LearningOS/learn_rust_rustlings-Wzzzx against master#1ddedbaa5919b7b3e70d984660e21e844c615c97 for pr-128400
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Wzzzx" "/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/LearningOS/learn_rust_rustlings-Wzzzx on toolchain 1ddedbaa5919b7b3e70d984660e21e844c615c97
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx 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" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing LearningOS/learn_rust_rustlings-Wzzzx against try#33f1d8bb92813a1bfc23c093c9f443ab09290307 for pr-128400
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Wzzzx" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx on toolchain 33f1d8bb92813a1bfc23c093c9f443ab09290307
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx 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" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing LearningOS/learn_rust_rustlings-Wzzzx against try#33f1d8bb92813a1bfc23c093c9f443ab09290307 for pr-128400
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Wzzzx" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx on toolchain 33f1d8bb92813a1bfc23c093c9f443ab09290307
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Wzzzx 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" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]     Updating rustlings v4.7.1 (/workspace/builds/worker-5-tc2/source) -> v4.8.0
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded console v0.15.0
[INFO] [stderr]   Downloaded treeline v0.1.0
[INFO] [stderr]   Downloaded slab v0.4.4
[INFO] [stderr]   Downloaded home v0.5.3
[INFO] [stderr]   Downloaded predicates-core v1.0.2
[INFO] [stderr]   Downloaded argh_shared v0.1.5
[INFO] [stderr]   Downloaded predicates-tree v1.0.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.28
[INFO] [stderr]   Downloaded argh_derive v0.1.5
[INFO] [stderr]   Downloaded argh v0.1.5
[INFO] [stderr]   Downloaded syn v1.0.75
[INFO] [stderr]   Downloaded libc v0.2.100
[INFO] [stderr]   Downloaded serde_derive v1.0.129
[INFO] [stderr]   Downloaded serde v1.0.129
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 166ee16b9512ce19d08c1412417b5eee874cecfb01a590880aa3130d9dfd7e03
[INFO] running `Command { std: "docker" "start" "-a" "166ee16b9512ce19d08c1412417b5eee874cecfb01a590880aa3130d9dfd7e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "166ee16b9512ce19d08c1412417b5eee874cecfb01a590880aa3130d9dfd7e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "166ee16b9512ce19d08c1412417b5eee874cecfb01a590880aa3130d9dfd7e03", kill_on_drop: false }`
[INFO] [stdout] 166ee16b9512ce19d08c1412417b5eee874cecfb01a590880aa3130d9dfd7e03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c5c58f8eb7e0a88863b79068f74fca5018946deb4adfe113c265919423c5f57
[INFO] running `Command { std: "docker" "start" "-a" "9c5c58f8eb7e0a88863b79068f74fca5018946deb4adfe113c265919423c5f57", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.60s
[INFO] running `Command { std: "docker" "inspect" "9c5c58f8eb7e0a88863b79068f74fca5018946deb4adfe113c265919423c5f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c5c58f8eb7e0a88863b79068f74fca5018946deb4adfe113c265919423c5f57", kill_on_drop: false }`
[INFO] [stdout] 9c5c58f8eb7e0a88863b79068f74fca5018946deb4adfe113c265919423c5f57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 236a531f0908c2585a30ab12845974279aa8b033736c67147d01fcdf199a7daf
[INFO] running `Command { std: "docker" "start" "-a" "236a531f0908c2585a30ab12845974279aa8b033736c67147d01fcdf199a7daf", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[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 v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.68s
[INFO] running `Command { std: "docker" "inspect" "236a531f0908c2585a30ab12845974279aa8b033736c67147d01fcdf199a7daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "236a531f0908c2585a30ab12845974279aa8b033736c67147d01fcdf199a7daf", kill_on_drop: false }`
[INFO] [stdout] 236a531f0908c2585a30ab12845974279aa8b033736c67147d01fcdf199a7daf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 41566b7798d28fbbfcac7d0fb3ba12bda30c1370f28e14eb5ca49aa0d081421b
[INFO] running `Command { std: "docker" "start" "-a" "41566b7798d28fbbfcac7d0fb3ba12bda30c1370f28e14eb5ca49aa0d081421b", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustlings-464ad91fc51e937d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-e57c461bff615e2e)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stdout] test exercise::test::test_clean ... FAILED
[INFO] [stdout] test exercise::test::test_exercise_with_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs: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:     0x5606b6a32ab5 - std::backtrace_rs::backtrace::libunwind::trace::h644651cb29d88bb0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x5606b6a32ab5 - std::backtrace_rs::backtrace::trace_unsynchronized::h4f227a4714c93f22
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5606b6a32ab5 - std::sys::backtrace::_print_fmt::hfe88767e38ff4b4e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5606b6a32ab5 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h0e27af9f1d310e0a
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5606b6a59f5b - core::fmt::rt::Argument::fmt::h900f10175a69b72e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5606b6a59f5b - core::fmt::write::h3a97e76bd9b733fa
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/fmt/mod.rs:1178:21
[INFO] [stdout]    6:     0x5606b6a2fe5f - std::io::Write::write_fmt::he4611995baa28da3
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/io/mod.rs:1823:15
[INFO] [stdout]    7:     0x5606b6a342d1 - std::sys::backtrace::BacktraceLock::print::h52f15558f43bfe2f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5606b6a342d1 - std::panicking::default_hook::{{closure}}::h77edc81607b06015
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:266:22
[INFO] [stdout]    9:     0x5606b6a33e78 - std::panicking::default_hook::h4a889c281e863e6e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:290:9
[INFO] [stdout]   10:     0x5606b68ae73a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h87ae598a6618f03f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2162:9
[INFO] [stdout]   11:     0x5606b68ae73a - test::test_main::{{closure}}::haa35c2695dfcc048
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:132:21
[INFO] [stdout]   12:     0x5606b6a34bdf - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0934a01d4a1cdb06
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2162:9
[INFO] [stdout]   13:     0x5606b6a34bdf - std::panicking::rust_panic_with_hook::h74d8fff54c965152
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:805:13
[INFO] [stdout]   14:     0x5606b6a34807 - std::panicking::begin_panic_handler::{{closure}}::h82b61517a14ab3ae
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:671:13
[INFO] [stdout]   15:     0x5606b6a32f79 - std::sys::backtrace::__rust_end_short_backtrace::h7f24a51d7748d3e4
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x5606b6a34494 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:662:5
[INFO] [stdout]   17:     0x5606b6a58853 - core::panicking::panic_fmt::h7de3a20d92caa6a2
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panicking.rs:74:14
[INFO] [stdout]   18:     0x5606b6a58da6 - core::result::unwrap_failed::hbfce3c09bc996f11
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/result.rs:1679:5
[INFO] [stdout]   19:     0x5606b686e6ba - core::result::Result<T,E>::unwrap::heb6a9e9728d9416f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/result.rs:1102:23
[INFO] [stdout]   20:     0x5606b686e6ba - rustlings::exercise::test::test_clean::h9c5d144b4b23367f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   21:     0x5606b686e5f7 - rustlings::exercise::test::test_clean::{{closure}}::h4430718bacc1867e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   22:     0x5606b686bb16 - core::ops::function::FnOnce::call_once::h8ada84b81a89e255
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5606b68b32bb - core::ops::function::FnOnce::call_once::h24a6f01be65f4680
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5606b68b32bb - test::__rust_begin_short_backtrace::h7c53016b80d5a608
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:620:18
[INFO] [stdout]   25:     0x5606b68b2ad5 - test::run_test_in_process::{{closure}}::hde6a274ce897aaad
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:643:60
[INFO] [stdout]   26:     0x5606b68b2ad5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd431ac2f54963786
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5606b68b2ad5 - std::panicking::try::do_call::h10362e01a063baa0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:554:40
[INFO] [stdout]   28:     0x5606b68b2ad5 - std::panicking::try::h30318180e4290dce
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:518:19
[INFO] [stdout]   29:     0x5606b68b2ad5 - std::panic::catch_unwind::h97d52b1b1f400ecc
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panic.rs:345:14
[INFO] [stdout]   30:     0x5606b68b2ad5 - test::run_test_in_process::haec7bb1f728b765d
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:643:27
[INFO] [stdout]   31:     0x5606b68b2ad5 - test::run_test::{{closure}}::ha988a53ee25f80e1
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:564:43
[INFO] [stdout]   32:     0x5606b68783a4 - test::run_test::{{closure}}::hddc4d91f14475af0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:594:41
[INFO] [stdout]   33:     0x5606b68783a4 - std::sys::backtrace::__rust_begin_short_backtrace::h550bd80387fd32b0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x5606b687bad2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h0907e6530d89c432
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/thread/mod.rs:524:17
[INFO] [stdout]   35:     0x5606b687bad2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1426168782d20988
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5606b687bad2 - std::panicking::try::do_call::h9e10c7df8de701e0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:554:40
[INFO] [stdout]   37:     0x5606b687bad2 - std::panicking::try::hc0169bb633716dc9
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:518:19
[INFO] [stdout]   38:     0x5606b687bad2 - std::panic::catch_unwind::h2d365a7fbba378ff
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panic.rs:345:14
[INFO] [stdout]   39:     0x5606b687bad2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h99b3d5b0eb8d8349
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/thread/mod.rs:523:30
[INFO] [stdout]   40:     0x5606b687bad2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h785f99837c772588
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5606b6a38f0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9d8f2204f4fcbe73
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2148:9
[INFO] [stdout]   42:     0x5606b6a38f0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h817ffd7b41f007e2
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2148:9
[INFO] [stdout]   43:     0x5606b6a38f0b - std::sys::pal::unix::thread::Thread::new::thread_start::hfffda88b0cd3e69f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x7f676acf2ac3 - <unknown>
[INFO] [stdout]   45:     0x7f676ad83a04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs: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/./rmetaDee1pO\"\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:     0x5606b6a32ab5 - std::backtrace_rs::backtrace::libunwind::trace::h644651cb29d88bb0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x5606b6a32ab5 - std::backtrace_rs::backtrace::trace_unsynchronized::h4f227a4714c93f22
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5606b6a32ab5 - std::sys::backtrace::_print_fmt::hfe88767e38ff4b4e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5606b6a32ab5 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h0e27af9f1d310e0a
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5606b6a59f5b - core::fmt::rt::Argument::fmt::h900f10175a69b72e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5606b6a59f5b - core::fmt::write::h3a97e76bd9b733fa
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/fmt/mod.rs:1178:21
[INFO] [stdout]    6:     0x5606b6a2fe5f - std::io::Write::write_fmt::he4611995baa28da3
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/io/mod.rs:1823:15
[INFO] [stdout]    7:     0x5606b6a342d1 - std::sys::backtrace::BacktraceLock::print::h52f15558f43bfe2f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5606b6a342d1 - std::panicking::default_hook::{{closure}}::h77edc81607b06015
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:266:22
[INFO] [stdout]    9:     0x5606b6a33e78 - std::panicking::default_hook::h4a889c281e863e6e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:290:9
[INFO] [stdout]   10:     0x5606b68ae73a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h87ae598a6618f03f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2162:9
[INFO] [stdout]   11:     0x5606b68ae73a - test::test_main::{{closure}}::haa35c2695dfcc048
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:132:21
[INFO] [stdout]   12:     0x5606b6a34bdf - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0934a01d4a1cdb06
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2162:9
[INFO] [stdout]   13:     0x5606b6a34bdf - std::panicking::rust_panic_with_hook::h74d8fff54c965152
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:805:13
[INFO] [stdout]   14:     0x5606b6a34807 - std::panicking::begin_panic_handler::{{closure}}::h82b61517a14ab3ae
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:671:13
[INFO] [stdout]   15:     0x5606b6a32f79 - std::sys::backtrace::__rust_end_short_backtrace::h7f24a51d7748d3e4
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x5606b6a34494 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:662:5
[INFO] [stdout]   17:     0x5606b6a58853 - core::panicking::panic_fmt::h7de3a20d92caa6a2
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panicking.rs:74:14
[INFO] [stdout]   18:     0x5606b6a58da6 - core::result::unwrap_failed::hbfce3c09bc996f11
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/result.rs:1679:5
[INFO] [stdout]   19:     0x5606b686f51a - core::result::Result<T,E>::unwrap::hcd34fae76206226e
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/result.rs:1102:23
[INFO] [stdout]   20:     0x5606b686f51a - rustlings::exercise::test::test_exercise_with_output::haed8a79e12ba8fe5
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   21:     0x5606b686f327 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h0184eafc1380fb4d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   22:     0x5606b686bbb6 - core::ops::function::FnOnce::call_once::heb3062b656f73d63
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5606b68b32bb - core::ops::function::FnOnce::call_once::h24a6f01be65f4680
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5606b68b32bb - test::__rust_begin_short_backtrace::h7c53016b80d5a608
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:620:18
[INFO] [stdout]   25:     0x5606b68b2ad5 - test::run_test_in_process::{{closure}}::hde6a274ce897aaad
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:643:60
[INFO] [stdout]   26:     0x5606b68b2ad5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd431ac2f54963786
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5606b68b2ad5 - std::panicking::try::do_call::h10362e01a063baa0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:554:40
[INFO] [stdout]   28:     0x5606b68b2ad5 - std::panicking::try::h30318180e4290dce
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:518:19
[INFO] [stdout]   29:     0x5606b68b2ad5 - std::panic::catch_unwind::h97d52b1b1f400ecc
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panic.rs:345:14
[INFO] [stdout]   30:     0x5606b68b2ad5 - test::run_test_in_process::haec7bb1f728b765d
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:643:27
[INFO] [stdout]   31:     0x5606b68b2ad5 - test::run_test::{{closure}}::ha988a53ee25f80e1
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:564:43
[INFO] [stdout]   32:     0x5606b68783a4 - test::run_test::{{closure}}::hddc4d91f14475af0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/test/src/lib.rs:594:41
[INFO] [stdout]   33:     0x5606b68783a4 - std::sys::backtrace::__rust_begin_short_backtrace::h550bd80387fd32b0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x5606b687bad2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h0907e6530d89c432
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/thread/mod.rs:524:17
[INFO] [stdout]   35:     0x5606b687bad2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1426168782d20988
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5606b687bad2 - std::panicking::try::do_call::h9e10c7df8de701e0
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:554:40
[INFO] [stdout]   37:     0x5606b687bad2 - std::panicking::try::hc0169bb633716dc9
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panicking.rs:518:19
[INFO] [stdout]   38:     0x5606b687bad2 - std::panic::catch_unwind::h2d365a7fbba378ff
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/panic.rs:345:14
[INFO] [stdout]   39:     0x5606b687bad2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h99b3d5b0eb8d8349
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/thread/mod.rs:523:30
[INFO] [stdout]   40:     0x5606b687bad2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h785f99837c772588
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5606b6a38f0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9d8f2204f4fcbe73
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2148:9
[INFO] [stdout]   42:     0x5606b6a38f0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h817ffd7b41f007e2
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/alloc/src/boxed.rs:2148:9
[INFO] [stdout]   43:     0x5606b6a38f0b - std::sys::pal::unix::thread::Thread::new::thread_start::hfffda88b0cd3e69f
[INFO] [stdout]                                at /rustc/33f1d8bb92813a1bfc23c093c9f443ab09290307/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x7f676acf2ac3 - <unknown>
[INFO] [stdout]   45:     0x7f676ad83a04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout]     exercise::test::test_exercise_with_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "41566b7798d28fbbfcac7d0fb3ba12bda30c1370f28e14eb5ca49aa0d081421b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41566b7798d28fbbfcac7d0fb3ba12bda30c1370f28e14eb5ca49aa0d081421b", kill_on_drop: false }`
[INFO] [stdout] 41566b7798d28fbbfcac7d0fb3ba12bda30c1370f28e14eb5ca49aa0d081421b