[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-Roc8848
[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-Roc8848" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Roc8848", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Roc8848'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4ab41a22303ceab11223fb324175102c0a6391c
[INFO] testing LearningOS/learn_rust_rustlings-Roc8848 against master#9e297bf54d31eb3b30067208ff9af4416945a2ed for pr-125507
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Roc8848" "/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/LearningOS/learn_rust_rustlings-Roc8848 on toolchain 9e297bf54d31eb3b30067208ff9af4416945a2ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e297bf54d31eb3b30067208ff9af4416945a2ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848 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" "+9e297bf54d31eb3b30067208ff9af4416945a2ed" "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-Roc8848 against try#61a9ac64344e91d62f5496627ff363d177f9daab for pr-125507
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Roc8848" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848 on toolchain 61a9ac64344e91d62f5496627ff363d177f9daab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61a9ac64344e91d62f5496627ff363d177f9daab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Roc8848 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" "+61a9ac64344e91d62f5496627ff363d177f9daab" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+61a9ac64344e91d62f5496627ff363d177f9daab" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d88d12f10a7703d3faab1e7ced6e63812d8e60fc779eee697f4a95dbceade71
[INFO] running `Command { std: "docker" "start" "-a" "7d88d12f10a7703d3faab1e7ced6e63812d8e60fc779eee697f4a95dbceade71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d88d12f10a7703d3faab1e7ced6e63812d8e60fc779eee697f4a95dbceade71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d88d12f10a7703d3faab1e7ced6e63812d8e60fc779eee697f4a95dbceade71", kill_on_drop: false }`
[INFO] [stdout] 7d88d12f10a7703d3faab1e7ced6e63812d8e60fc779eee697f4a95dbceade71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+61a9ac64344e91d62f5496627ff363d177f9daab" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c053402d8388c708473edf085125bd37fec45b198e3e8cc130d97cd8ecd57e33
[INFO] running `Command { std: "docker" "start" "-a" "c053402d8388c708473edf085125bd37fec45b198e3e8cc130d97cd8ecd57e33", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling glob v0.3.0
[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 filetime v0.2.15
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.30s
[INFO] running `Command { std: "docker" "inspect" "c053402d8388c708473edf085125bd37fec45b198e3e8cc130d97cd8ecd57e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c053402d8388c708473edf085125bd37fec45b198e3e8cc130d97cd8ecd57e33", kill_on_drop: false }`
[INFO] [stdout] c053402d8388c708473edf085125bd37fec45b198e3e8cc130d97cd8ecd57e33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+61a9ac64344e91d62f5496627ff363d177f9daab" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92d2d1f2095926ccaf8fd01d7399010d4b46ef8e26a0eedbb08e2fb24f466e41
[INFO] running `Command { std: "docker" "start" "-a" "92d2d1f2095926ccaf8fd01d7399010d4b46ef8e26a0eedbb08e2fb24f466e41", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling treeline v0.1.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling predicates v1.0.8
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.41s
[INFO] running `Command { std: "docker" "inspect" "92d2d1f2095926ccaf8fd01d7399010d4b46ef8e26a0eedbb08e2fb24f466e41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92d2d1f2095926ccaf8fd01d7399010d4b46ef8e26a0eedbb08e2fb24f466e41", kill_on_drop: false }`
[INFO] [stdout] 92d2d1f2095926ccaf8fd01d7399010d4b46ef8e26a0eedbb08e2fb24f466e41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+61a9ac64344e91d62f5496627ff363d177f9daab" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3c3a221854cf6ddec7f2f03f7da9767c241b0132c3c91c3d222fbbeb3cc36afb
[INFO] running `Command { std: "docker" "start" "-a" "3c3a221854cf6ddec7f2f03f7da9767c241b0132c3c91c3d222fbbeb3cc36afb", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustlings-464ad91fc51e937d)
[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_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 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:     0x5617cb4cabc5 - std::backtrace_rs::backtrace::libunwind::trace::h00ba42e7ea42c749
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x5617cb4cabc5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9c418817641943a2
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5617cb4cabc5 - std::sys_common::backtrace::_print_fmt::h16d2f41e50524011
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5617cb4cabc5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h024be4e490be0e9e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5617cb4f312b - core::fmt::rt::Argument::fmt::h374c4cfff31e7096
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x5617cb4f312b - core::fmt::write::hff043ad91cd7da0c
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/fmt/mod.rs:1172:21
[INFO] [stdout]    6:     0x5617cb4c7e8f - std::io::Write::write_fmt::hcbb4cf2cdd848a5b
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x5617cb4ca99e - std::sys_common::backtrace::_print::hdfa36fb392c08b8d
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5617cb4ca99e - std::sys_common::backtrace::print::h798da7279a9c7ae4
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5617cb4cc3f9 - std::panicking::default_hook::{{closure}}::h9b61607b4c5732c1
[INFO] [stdout]   10:     0x5617cb4cc066 - std::panicking::default_hook::hc6544668bd872893
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x5617cb35cd8a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9d3afca40a444cde
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2077:9
[INFO] [stdout]   12:     0x5617cb35cd8a - test::test_main::{{closure}}::h3c541e298fe81c6f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x5617cb4cca6b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1eb54927ae01d97f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2077:9
[INFO] [stdout]   14:     0x5617cb4cca6b - std::panicking::rust_panic_with_hook::h468693c9efe3a031
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x5617cb4cc7e4 - std::panicking::begin_panic_handler::{{closure}}::h98a70b5e29207c8e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x5617cb4cb089 - std::sys_common::backtrace::__rust_end_short_backtrace::h611a979064209015
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x5617cb4cc517 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x5617cb4f19c3 - core::panicking::panic_fmt::hb6dc9aface1df13b
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x5617cb4f1f86 - core::result::unwrap_failed::h68f46d2f65fd037f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/result.rs:1658:5
[INFO] [stdout]   20:     0x5617cb322c2a - core::result::Result<T,E>::unwrap::h9216428bca37a295
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/result.rs:1081:23
[INFO] [stdout]   21:     0x5617cb322c2a - rustlings::exercise::test::test_clean::hc64faea86df0d4d2
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   22:     0x5617cb322b67 - rustlings::exercise::test::test_clean::{{closure}}::h7f6d097b010d4701
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   23:     0x5617cb3204f6 - core::ops::function::FnOnce::call_once::h4d51689022120cfc
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5617cb3615bb - core::ops::function::FnOnce::call_once::h83b9e7210d04f0be
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5617cb3615bb - test::__rust_begin_short_backtrace::hc51e2566ee553989
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x5617cb360d11 - test::run_test_in_process::{{closure}}::h507f8c4135041c73
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x5617cb360d11 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd632d14c2c0c86cc
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x5617cb360d11 - std::panicking::try::do_call::he7cb1a3635628c20
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x5617cb360d11 - std::panicking::try::h254585cffc0ff5cb
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x5617cb360d11 - std::panic::catch_unwind::h30903f0fa4711873
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x5617cb360d11 - test::run_test_in_process::h270fbcadd28ef446
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x5617cb360d11 - test::run_test::{{closure}}::h18e4da806d3313a0
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x5617cb328a64 - test::run_test::{{closure}}::hc076b6d6ee9c0fac
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x5617cb328a64 - std::sys_common::backtrace::__rust_begin_short_backtrace::h4f576a631d422da3
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x5617cb32d3f2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hefe4a7694b5d43cd
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x5617cb32d3f2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hf636fa9a6585dda1
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x5617cb32d3f2 - std::panicking::try::do_call::h96113252ae0170f4
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x5617cb32d3f2 - std::panicking::try::h8973076d4927ad1d
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x5617cb32d3f2 - std::panic::catch_unwind::h19e5115b032f0ef3
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x5617cb32d3f2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h94b93148b33165cc
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x5617cb32d3f2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6156e4ffab7355ca
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5617cb4d0e4b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h55fe8ae975f6a9ec
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2063:9
[INFO] [stdout]   43:     0x5617cb4d0e4b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfe87b9909955678e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2063:9
[INFO] [stdout]   44:     0x5617cb4d0e4b - std::sys::pal::unix::thread::Thread::new::thread_start::h7a534a78099446c7
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7fb917f01ac3 - <unknown>
[INFO] [stdout]   46:     0x7fb917f92a04 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs:342:38:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetaEBa2JO\"\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:     0x5617cb4cabc5 - std::backtrace_rs::backtrace::libunwind::trace::h00ba42e7ea42c749
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x5617cb4cabc5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9c418817641943a2
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5617cb4cabc5 - std::sys_common::backtrace::_print_fmt::h16d2f41e50524011
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5617cb4cabc5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h024be4e490be0e9e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5617cb4f312b - core::fmt::rt::Argument::fmt::h374c4cfff31e7096
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x5617cb4f312b - core::fmt::write::hff043ad91cd7da0c
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/fmt/mod.rs:1172:21
[INFO] [stdout]    6:     0x5617cb4c7e8f - std::io::Write::write_fmt::hcbb4cf2cdd848a5b
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x5617cb4ca99e - std::sys_common::backtrace::_print::hdfa36fb392c08b8d
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5617cb4ca99e - std::sys_common::backtrace::print::h798da7279a9c7ae4
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5617cb4cc3f9 - std::panicking::default_hook::{{closure}}::h9b61607b4c5732c1
[INFO] [stdout]   10:     0x5617cb4cc066 - std::panicking::default_hook::hc6544668bd872893
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x5617cb35cd8a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9d3afca40a444cde
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2077:9
[INFO] [stdout]   12:     0x5617cb35cd8a - test::test_main::{{closure}}::h3c541e298fe81c6f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x5617cb4cca6b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1eb54927ae01d97f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2077:9
[INFO] [stdout]   14:     0x5617cb4cca6b - std::panicking::rust_panic_with_hook::h468693c9efe3a031
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x5617cb4cc7e4 - std::panicking::begin_panic_handler::{{closure}}::h98a70b5e29207c8e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x5617cb4cb089 - std::sys_common::backtrace::__rust_end_short_backtrace::h611a979064209015
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x5617cb4cc517 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x5617cb4f19c3 - core::panicking::panic_fmt::hb6dc9aface1df13b
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x5617cb4f1f86 - core::result::unwrap_failed::h68f46d2f65fd037f
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/result.rs:1658:5
[INFO] [stdout]   20:     0x5617cb323a8a - core::result::Result<T,E>::unwrap::h1dc025ee1683dcd1
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/result.rs:1081:23
[INFO] [stdout]   21:     0x5617cb323a8a - rustlings::exercise::test::test_exercise_with_output::h89b898dd3ee9f686
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   22:     0x5617cb323897 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h1b84b64823ace5aa
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   23:     0x5617cb3204b6 - core::ops::function::FnOnce::call_once::h493e749f6a52c09b
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5617cb3615bb - core::ops::function::FnOnce::call_once::h83b9e7210d04f0be
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5617cb3615bb - test::__rust_begin_short_backtrace::hc51e2566ee553989
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x5617cb360d11 - test::run_test_in_process::{{closure}}::h507f8c4135041c73
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x5617cb360d11 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd632d14c2c0c86cc
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x5617cb360d11 - std::panicking::try::do_call::he7cb1a3635628c20
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x5617cb360d11 - std::panicking::try::h254585cffc0ff5cb
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x5617cb360d11 - std::panic::catch_unwind::h30903f0fa4711873
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x5617cb360d11 - test::run_test_in_process::h270fbcadd28ef446
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x5617cb360d11 - test::run_test::{{closure}}::h18e4da806d3313a0
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x5617cb328a64 - test::run_test::{{closure}}::hc076b6d6ee9c0fac
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x5617cb328a64 - std::sys_common::backtrace::__rust_begin_short_backtrace::h4f576a631d422da3
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x5617cb32d3f2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hefe4a7694b5d43cd
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x5617cb32d3f2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hf636fa9a6585dda1
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x5617cb32d3f2 - std::panicking::try::do_call::h96113252ae0170f4
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x5617cb32d3f2 - std::panicking::try::h8973076d4927ad1d
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x5617cb32d3f2 - std::panic::catch_unwind::h19e5115b032f0ef3
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x5617cb32d3f2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h94b93148b33165cc
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x5617cb32d3f2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6156e4ffab7355ca
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5617cb4d0e4b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h55fe8ae975f6a9ec
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2063:9
[INFO] [stdout]   43:     0x5617cb4d0e4b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfe87b9909955678e
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/alloc/src/boxed.rs:2063:9
[INFO] [stdout]   44:     0x5617cb4d0e4b - std::sys::pal::unix::thread::Thread::new::thread_start::h7a534a78099446c7
[INFO] [stdout]                                at /rustc/61a9ac64344e91d62f5496627ff363d177f9daab/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7fb917f01ac3 - <unknown>
[INFO] [stdout]   46:     0x7fb917f92a04 - __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 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "3c3a221854cf6ddec7f2f03f7da9767c241b0132c3c91c3d222fbbeb3cc36afb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c3a221854cf6ddec7f2f03f7da9767c241b0132c3c91c3d222fbbeb3cc36afb", kill_on_drop: false }`
[INFO] [stdout] 3c3a221854cf6ddec7f2f03f7da9767c241b0132c3c91c3d222fbbeb3cc36afb