[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu [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-Yao-mengyu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Yao-mengyu", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Yao-mengyu'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] fd4ad279e8b058a2ab3d467eed5ebcf3da4a77df [INFO] testing LearningOS/learn_rust_rustlings-Yao-mengyu against try#028592fec99e54cc92def5a2a849c673b066dd93 for pr-146098 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-Yao-mengyu" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu [INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu [INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu on toolchain 028592fec99e54cc92def5a2a849c673b066dd93 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-Yao-mengyu 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" "+028592fec99e54cc92def5a2a849c673b066dd93" "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] Blocking waiting for file lock on package cache [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4aac5aa3ee20f942ca0b088b7b46f10c30e3f62f1562887a79397c8d9fe70784 [INFO] running `Command { std: "docker" "start" "-a" "4aac5aa3ee20f942ca0b088b7b46f10c30e3f62f1562887a79397c8d9fe70784", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4aac5aa3ee20f942ca0b088b7b46f10c30e3f62f1562887a79397c8d9fe70784", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4aac5aa3ee20f942ca0b088b7b46f10c30e3f62f1562887a79397c8d9fe70784", kill_on_drop: false }` [INFO] [stdout] 4aac5aa3ee20f942ca0b088b7b46f10c30e3f62f1562887a79397c8d9fe70784 [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 98c92e95ad92a1a36b29606c8b41d079da311c7bcbedf2dc6258087358ac33ce [INFO] running `Command { std: "docker" "start" "-a" "98c92e95ad92a1a36b29606c8b41d079da311c7bcbedf2dc6258087358ac33ce", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.100 [INFO] [stderr] Compiling proc-macro2 v1.0.28 [INFO] [stderr] Compiling syn v1.0.75 [INFO] [stderr] Compiling serde_derive v1.0.129 [INFO] [stderr] Compiling serde v1.0.129 [INFO] [stderr] Compiling slab v0.4.4 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling argh_shared v0.1.5 [INFO] [stderr] Compiling serde_json v1.0.81 [INFO] [stderr] Compiling walkdir v2.3.2 [INFO] [stderr] Compiling itoa v1.0.2 [INFO] [stderr] Compiling glob v0.3.0 [INFO] [stderr] Compiling home v0.5.3 [INFO] [stderr] Compiling regex v1.5.5 [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 console v0.15.0 [INFO] [stderr] Compiling mio v0.6.23 [INFO] [stderr] Compiling indicatif v0.16.2 [INFO] [stderr] Compiling argh_derive v0.1.5 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling notify v4.0.17 [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] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:109:20 [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.05s [INFO] running `Command { std: "docker" "inspect" "98c92e95ad92a1a36b29606c8b41d079da311c7bcbedf2dc6258087358ac33ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "98c92e95ad92a1a36b29606c8b41d079da311c7bcbedf2dc6258087358ac33ce", kill_on_drop: false }` [INFO] [stdout] 98c92e95ad92a1a36b29606c8b41d079da311c7bcbedf2dc6258087358ac33ce [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ef5524a69adbde15eaaa84b6bee72d2c6d4e4c5c163729aa6dc25e1d08e6b041 [INFO] running `Command { std: "docker" "start" "-a" "ef5524a69adbde15eaaa84b6bee72d2c6d4e4c5c163729aa6dc25e1d08e6b041", kill_on_drop: false }` [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling predicates-core v1.0.2 [INFO] [stderr] Compiling treeline v0.1.0 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:109:20 [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [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] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:109:20 [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 109 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 3.72s [INFO] running `Command { std: "docker" "inspect" "ef5524a69adbde15eaaa84b6bee72d2c6d4e4c5c163729aa6dc25e1d08e6b041", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ef5524a69adbde15eaaa84b6bee72d2c6d4e4c5c163729aa6dc25e1d08e6b041", kill_on_drop: false }` [INFO] [stdout] ef5524a69adbde15eaaa84b6bee72d2c6d4e4c5c163729aa6dc25e1d08e6b041 [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 16308ae6c8b153f471e5ea368b9ff4c65ecaaef7f3dd2252bc50e4a13ff9d697 [INFO] running `Command { std: "docker" "start" "-a" "16308ae6c8b153f471e5ea368b9ff4c65ecaaef7f3dd2252bc50e4a13ff9d697", kill_on_drop: false }` [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/exercise.rs:109:20 [INFO] [stderr] | [INFO] [stderr] 109 | pub fn compile(&self) -> Result { [INFO] [stderr] | ^^^^^ ^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is elided here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stderr] help: use `'_` for type paths [INFO] [stderr] | [INFO] [stderr] 109 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stderr] | ++++ [INFO] [stderr] [INFO] [stderr] warning: `rustlings` (bin "rustlings") generated 1 warning (run `cargo fix --bin "rustlings"` to apply 1 suggestion) [INFO] [stderr] warning: `rustlings` (bin "rustlings" test) generated 1 warning (1 duplicate) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustlings-ff06e548b6a13742) [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-785afc69b448555b) [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] [INFO] [stdout] thread 'exercise::test::test_clean' (26) 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: 0x5789300af4a2 - std::backtrace_rs::backtrace::libunwind::trace::hcbb09259ca22005c [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x5789300af4a2 - std::backtrace_rs::backtrace::trace_unsynchronized::h0fac8c223cd6e456 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x5789300af4a2 - std::sys::backtrace::_print_fmt::he5f2b5e0c66ce66e [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:66:9 [INFO] [stdout] 3: 0x5789300af4a2 - ::fmt::haf29e060fb6137a9 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:39:26 [INFO] [stdout] 4: 0x5789300c031f - core::fmt::rt::Argument::fmt::h596977d9d4f722b0 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/fmt/rt.rs:173:76 [INFO] [stdout] 5: 0x5789300c031f - core::fmt::write::h0ee4d44b8e20572d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/fmt/mod.rs:1468:25 [INFO] [stdout] 6: 0x57893007c151 - std::io::default_write_fmt::h5f5bf04c08f51588 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x57893007c151 - std::io::Write::write_fmt::he99637cf0d3cbc1c [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/io/mod.rs:1954:13 [INFO] [stdout] 8: 0x578930088462 - std::sys::backtrace::BacktraceLock::print::h3db71735b2a2861b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:42:9 [INFO] [stdout] 9: 0x57893008d05f - std::panicking::default_hook::{{closure}}::h0168a26bb62ec69b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:301:27 [INFO] [stdout] 10: 0x57893008cef1 - std::panicking::default_hook::h7454a6fd0ab61b64 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:325:9 [INFO] [stdout] 11: 0x57892ff15e0e - as core::ops::function::Fn>::call::h8dac224212939801 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1987:9 [INFO] [stdout] 12: 0x57892ff15e0e - test::test_main_with_exit_callback::{{closure}}::h18346b0063635f4a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:145:21 [INFO] [stdout] 13: 0x57893008d71f - as core::ops::function::Fn>::call::h7e5d21d6123baaaf [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1987:9 [INFO] [stdout] 14: 0x57893008d71f - std::panicking::panic_with_hook::h2d45a49bfd4e6ec4 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:842:13 [INFO] [stdout] 15: 0x57893008d57a - std::panicking::panic_handler::{{closure}}::h37f0f43a266cd34d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:707:13 [INFO] [stdout] 16: 0x578930088599 - std::sys::backtrace::__rust_end_short_backtrace::h1ed0bd8883e4d747 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:174:18 [INFO] [stdout] 17: 0x57893007049d - __rustc[92da9811a626c906]::rust_begin_unwind [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:698:5 [INFO] [stdout] 18: 0x5789300c86e0 - core::panicking::panic_fmt::hc1117383da035bf0 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panicking.rs:78:14 [INFO] [stdout] 19: 0x5789300c7b06 - core::result::unwrap_failed::h9521c83364d1c9d7 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/result.rs:1855:5 [INFO] [stdout] 20: 0x57892fee95cc - core::result::Result::unwrap::h7427e782003d7aeb [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/result.rs:1226:23 [INFO] [stdout] 21: 0x57892fee95cc - rustlings::exercise::test::test_clean::h71151db8b0047b08 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:269:36 [INFO] [stdout] 22: 0x57892fee99a7 - rustlings::exercise::test::test_clean::{{closure}}::h8900e134d20c9076 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:268:20 [INFO] [stdout] 23: 0x57892feecf46 - core::ops::function::FnOnce::call_once::ha80aff9bab4d0f73 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 24: 0x57892ff15bcb - core::ops::function::FnOnce::call_once::habfa9d6a6bb4aa21 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 25: 0x57892ff15bcb - test::__rust_begin_short_backtrace::hc119b5350e87269b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:663:18 [INFO] [stdout] 26: 0x57892ff2b815 - test::run_test_in_process::{{closure}}::h47f2af3109a35895 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:686:74 [INFO] [stdout] 27: 0x57892ff2b815 - as core::ops::function::FnOnce<()>>::call_once::h5dba888a302c7fc3 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 28: 0x57892ff2b815 - std::panicking::catch_unwind::do_call::h245c3fdea830e686 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:590:40 [INFO] [stdout] 29: 0x57892ff2b815 - std::panicking::catch_unwind::he88149d1cfc3a929 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:553:19 [INFO] [stdout] 30: 0x57892ff2b815 - std::panic::catch_unwind::hd43a8ff20deb6d7a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panic.rs:359:14 [INFO] [stdout] 31: 0x57892ff2b815 - test::run_test_in_process::hcf11d509449005e2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:686:27 [INFO] [stdout] 32: 0x57892ff2b815 - test::run_test::{{closure}}::heb13d4899a512502 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:607:43 [INFO] [stdout] 33: 0x57892ff01ff4 - test::run_test::{{closure}}::h3e08e9adf8aad35e [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:637:41 [INFO] [stdout] 34: 0x57892ff01ff4 - std::sys::backtrace::__rust_begin_short_backtrace::h773f9a01402fd17f [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:158:18 [INFO] [stdout] 35: 0x57892ff058fa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h408f0520947b97f2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/thread/mod.rs:559:17 [INFO] [stdout] 36: 0x57892ff058fa - as core::ops::function::FnOnce<()>>::call_once::h1162a01751e98fdc [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 37: 0x57892ff058fa - std::panicking::catch_unwind::do_call::hf4224593c5d108e2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:590:40 [INFO] [stdout] 38: 0x57892ff058fa - std::panicking::catch_unwind::h4478d419d6ab8a26 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:553:19 [INFO] [stdout] 39: 0x57892ff058fa - std::panic::catch_unwind::h1e472892204dcfec [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panic.rs:359:14 [INFO] [stdout] 40: 0x57892ff058fa - std::thread::Builder::spawn_unchecked_::{{closure}}::hd555321a5ac5351d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/thread/mod.rs:557:30 [INFO] [stdout] 41: 0x57892ff058fa - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb9947c3c1cc735ed [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 42: 0x5789300835ff - as core::ops::function::FnOnce>::call_once::hf699f0a3c139bc19 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1973:9 [INFO] [stdout] 43: 0x5789300835ff - std::sys::thread::unix::Thread::new::thread_start::h2d5318761291e34a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/thread/unix.rs:126:17 [INFO] [stdout] 44: 0x7a1ee0a43aa4 - [INFO] [stdout] 45: 0x7a1ee0ad0a34 - clone [INFO] [stdout] 46: 0x0 - [INFO] [stdout] [INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ---- [INFO] [stdout] [INFO] [stdout] thread 'exercise::test::test_exercise_with_output' (27) 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/./rmetaQ5t4v2\"\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: 0x5789300af4a2 - std::backtrace_rs::backtrace::libunwind::trace::hcbb09259ca22005c [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x5789300af4a2 - std::backtrace_rs::backtrace::trace_unsynchronized::h0fac8c223cd6e456 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x5789300af4a2 - std::sys::backtrace::_print_fmt::he5f2b5e0c66ce66e [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:66:9 [INFO] [stdout] 3: 0x5789300af4a2 - ::fmt::haf29e060fb6137a9 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:39:26 [INFO] [stdout] 4: 0x5789300c031f - core::fmt::rt::Argument::fmt::h596977d9d4f722b0 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/fmt/rt.rs:173:76 [INFO] [stdout] 5: 0x5789300c031f - core::fmt::write::h0ee4d44b8e20572d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/fmt/mod.rs:1468:25 [INFO] [stdout] 6: 0x57893007c151 - std::io::default_write_fmt::h5f5bf04c08f51588 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x57893007c151 - std::io::Write::write_fmt::he99637cf0d3cbc1c [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/io/mod.rs:1954:13 [INFO] [stdout] 8: 0x578930088462 - std::sys::backtrace::BacktraceLock::print::h3db71735b2a2861b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:42:9 [INFO] [stdout] 9: 0x57893008d05f - std::panicking::default_hook::{{closure}}::h0168a26bb62ec69b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:301:27 [INFO] [stdout] 10: 0x57893008cef1 - std::panicking::default_hook::h7454a6fd0ab61b64 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:325:9 [INFO] [stdout] 11: 0x57892ff15e0e - as core::ops::function::Fn>::call::h8dac224212939801 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1987:9 [INFO] [stdout] 12: 0x57892ff15e0e - test::test_main_with_exit_callback::{{closure}}::h18346b0063635f4a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:145:21 [INFO] [stdout] 13: 0x57893008d71f - as core::ops::function::Fn>::call::h7e5d21d6123baaaf [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1987:9 [INFO] [stdout] 14: 0x57893008d71f - std::panicking::panic_with_hook::h2d45a49bfd4e6ec4 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:842:13 [INFO] [stdout] 15: 0x57893008d57a - std::panicking::panic_handler::{{closure}}::h37f0f43a266cd34d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:707:13 [INFO] [stdout] 16: 0x578930088599 - std::sys::backtrace::__rust_end_short_backtrace::h1ed0bd8883e4d747 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:174:18 [INFO] [stdout] 17: 0x57893007049d - __rustc[92da9811a626c906]::rust_begin_unwind [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:698:5 [INFO] [stdout] 18: 0x5789300c86e0 - core::panicking::panic_fmt::hc1117383da035bf0 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panicking.rs:78:14 [INFO] [stdout] 19: 0x5789300c7b06 - core::result::unwrap_failed::h9521c83364d1c9d7 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/result.rs:1855:5 [INFO] [stdout] 20: 0x57892feea418 - core::result::Result::unwrap::h178b955ead2ca564 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/result.rs:1226:23 [INFO] [stdout] 21: 0x57892feea418 - rustlings::exercise::test::test_exercise_with_output::h9e6aadf1791f9668 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:342:38 [INFO] [stdout] 22: 0x57892feea697 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h719d005f256589b3 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:335:35 [INFO] [stdout] 23: 0x57892feecf06 - core::ops::function::FnOnce::call_once::h812cc40c1d2848f0 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 24: 0x57892ff15bcb - core::ops::function::FnOnce::call_once::habfa9d6a6bb4aa21 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 25: 0x57892ff15bcb - test::__rust_begin_short_backtrace::hc119b5350e87269b [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:663:18 [INFO] [stdout] 26: 0x57892ff2b815 - test::run_test_in_process::{{closure}}::h47f2af3109a35895 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:686:74 [INFO] [stdout] 27: 0x57892ff2b815 - as core::ops::function::FnOnce<()>>::call_once::h5dba888a302c7fc3 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 28: 0x57892ff2b815 - std::panicking::catch_unwind::do_call::h245c3fdea830e686 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:590:40 [INFO] [stdout] 29: 0x57892ff2b815 - std::panicking::catch_unwind::he88149d1cfc3a929 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:553:19 [INFO] [stdout] 30: 0x57892ff2b815 - std::panic::catch_unwind::hd43a8ff20deb6d7a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panic.rs:359:14 [INFO] [stdout] 31: 0x57892ff2b815 - test::run_test_in_process::hcf11d509449005e2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:686:27 [INFO] [stdout] 32: 0x57892ff2b815 - test::run_test::{{closure}}::heb13d4899a512502 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:607:43 [INFO] [stdout] 33: 0x57892ff01ff4 - test::run_test::{{closure}}::h3e08e9adf8aad35e [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/test/src/lib.rs:637:41 [INFO] [stdout] 34: 0x57892ff01ff4 - std::sys::backtrace::__rust_begin_short_backtrace::h773f9a01402fd17f [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/backtrace.rs:158:18 [INFO] [stdout] 35: 0x57892ff058fa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h408f0520947b97f2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/thread/mod.rs:559:17 [INFO] [stdout] 36: 0x57892ff058fa - as core::ops::function::FnOnce<()>>::call_once::h1162a01751e98fdc [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 37: 0x57892ff058fa - std::panicking::catch_unwind::do_call::hf4224593c5d108e2 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:590:40 [INFO] [stdout] 38: 0x57892ff058fa - std::panicking::catch_unwind::h4478d419d6ab8a26 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panicking.rs:553:19 [INFO] [stdout] 39: 0x57892ff058fa - std::panic::catch_unwind::h1e472892204dcfec [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/panic.rs:359:14 [INFO] [stdout] 40: 0x57892ff058fa - std::thread::Builder::spawn_unchecked_::{{closure}}::hd555321a5ac5351d [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/thread/mod.rs:557:30 [INFO] [stdout] 41: 0x57892ff058fa - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb9947c3c1cc735ed [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 42: 0x5789300835ff - as core::ops::function::FnOnce>::call_once::hf699f0a3c139bc19 [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/alloc/src/boxed.rs:1973:9 [INFO] [stdout] 43: 0x5789300835ff - std::sys::thread::unix::Thread::new::thread_start::h2d5318761291e34a [INFO] [stdout] at /rustc/028592fec99e54cc92def5a2a849c673b066dd93/library/std/src/sys/thread/unix.rs:126:17 [INFO] [stdout] 44: 0x7a1ee0a43aa4 - [INFO] [stdout] 45: 0x7a1ee0ad0a34 - clone [INFO] [stdout] 46: 0x0 - [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" "16308ae6c8b153f471e5ea368b9ff4c65ecaaef7f3dd2252bc50e4a13ff9d697", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "16308ae6c8b153f471e5ea368b9ff4c65ecaaef7f3dd2252bc50e4a13ff9d697", kill_on_drop: false }` [INFO] [stdout] 16308ae6c8b153f471e5ea368b9ff4c65ecaaef7f3dd2252bc50e4a13ff9d697