[INFO] cloning repository https://github.com/Jolkert/rustlings [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jolkert/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJolkert%2Frustlings", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJolkert%2Frustlings'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 6345701e524cc461924d6dfe6af820b51462297e [INFO] testing Jolkert/rustlings against beta-2026-01-20 for beta-1.94-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJolkert%2Frustlings" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Jolkert/rustlings [INFO] finished tweaking git repo https://github.com/Jolkert/rustlings [INFO] tweaked toml for git repo https://github.com/Jolkert/rustlings written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Jolkert/rustlings on toolchain beta-2026-01-20 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Jolkert/rustlings already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "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 [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded quote v1.0.29 [INFO] [stderr] Downloaded itoa v1.0.8 [INFO] [stderr] Downloaded argh_shared v0.1.10 [INFO] [stderr] Downloaded argh_derive v0.1.10 [INFO] [stderr] Downloaded assert_cmd v0.11.1 [INFO] [stderr] Downloaded console v0.15.7 [INFO] [stderr] Downloaded indicatif v0.16.2 [INFO] [stderr] Downloaded ryu v1.0.14 [INFO] [stderr] Downloaded proc-macro2 v1.0.64 [INFO] [stderr] Downloaded syn v2.0.25 [INFO] [stderr] Downloaded argh v0.1.10 [INFO] [stderr] Downloaded difference v2.0.0 [INFO] [stderr] Downloaded serde_json v1.0.102 [INFO] [stderr] Downloaded escargot v0.4.0 [INFO] [stderr] Downloaded predicates v1.0.8 [INFO] [stderr] Downloaded unicode-ident v1.0.10 [INFO] [stderr] Downloaded termtree v0.4.1 [INFO] [stderr] Downloaded predicates-tree v1.0.9 [INFO] [stderr] Downloaded float-cmp v0.8.0 [INFO] [stderr] Downloaded predicates-core v1.0.6 [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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b90431b3836172fcc27124cf0a2e53a7dfd59c9bc2cc59eaeed722be95f3542f [INFO] running `Command { std: "docker" "start" "-a" "b90431b3836172fcc27124cf0a2e53a7dfd59c9bc2cc59eaeed722be95f3542f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b90431b3836172fcc27124cf0a2e53a7dfd59c9bc2cc59eaeed722be95f3542f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b90431b3836172fcc27124cf0a2e53a7dfd59c9bc2cc59eaeed722be95f3542f", kill_on_drop: false }` [INFO] [stdout] b90431b3836172fcc27124cf0a2e53a7dfd59c9bc2cc59eaeed722be95f3542f [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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c5a93c54ff7ed06423ae5be3fced80f77710f4e5243862c516be0b6ee36bb2c0 [INFO] running `Command { std: "docker" "start" "-a" "c5a93c54ff7ed06423ae5be3fced80f77710f4e5243862c516be0b6ee36bb2c0", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.147 [INFO] [stderr] Compiling proc-macro2 v1.0.64 [INFO] [stderr] Compiling quote v1.0.29 [INFO] [stderr] Compiling unicode-ident v1.0.10 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling serde v1.0.171 [INFO] [stderr] Compiling log v0.4.19 [INFO] [stderr] Compiling regex-syntax v0.7.4 [INFO] [stderr] Compiling unicode-width v0.1.10 [INFO] [stderr] Compiling serde_json v1.0.102 [INFO] [stderr] Compiling slab v0.4.8 [INFO] [stderr] Compiling argh_shared v0.1.10 [INFO] [stderr] Compiling lazycell v1.3.0 [INFO] [stderr] Compiling walkdir v2.3.3 [INFO] [stderr] Compiling number_prefix v0.4.0 [INFO] [stderr] Compiling aho-corasick v1.0.2 [INFO] [stderr] Compiling ryu v1.0.14 [INFO] [stderr] Compiling itoa v1.0.8 [INFO] [stderr] Compiling home v0.5.5 [INFO] [stderr] Compiling glob v0.3.1 [INFO] [stderr] Compiling syn v2.0.25 [INFO] [stderr] Compiling net2 v0.2.39 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling inotify-sys v0.1.5 [INFO] [stderr] Compiling filetime v0.2.21 [INFO] [stderr] Compiling console v0.15.7 [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 notify v4.0.17 [INFO] [stderr] Compiling regex-automata v0.3.3 [INFO] [stderr] Compiling argh_derive v0.1.10 [INFO] [stderr] Compiling serde_derive v1.0.171 [INFO] [stderr] Compiling argh v0.1.10 [INFO] [stderr] Compiling regex v1.9.1 [INFO] [stderr] Compiling indicatif v0.16.2 [INFO] [stderr] Compiling toml v0.5.11 [INFO] [stderr] Compiling rustlings v5.5.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:110:20 [INFO] [stdout] | [INFO] [stdout] 110 | 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] 110 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.19s [INFO] running `Command { std: "docker" "inspect" "c5a93c54ff7ed06423ae5be3fced80f77710f4e5243862c516be0b6ee36bb2c0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c5a93c54ff7ed06423ae5be3fced80f77710f4e5243862c516be0b6ee36bb2c0", kill_on_drop: false }` [INFO] [stdout] c5a93c54ff7ed06423ae5be3fced80f77710f4e5243862c516be0b6ee36bb2c0 [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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ff677f4b4181b40ae8f34f7edd119ff70250bfaadb63e0bf34fef0946b6ef453 [INFO] running `Command { std: "docker" "start" "-a" "ff677f4b4181b40ae8f34f7edd119ff70250bfaadb63e0bf34fef0946b6ef453", kill_on_drop: false }` [INFO] [stderr] Compiling predicates-core v1.0.6 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling float-cmp v0.8.0 [INFO] [stderr] Compiling normalize-line-endings v0.3.0 [INFO] [stderr] Compiling termtree v0.4.1 [INFO] [stderr] Compiling difference v2.0.0 [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:110:20 [INFO] [stdout] | [INFO] [stdout] 110 | 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] 110 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling predicates-tree v1.0.9 [INFO] [stderr] Compiling predicates v1.0.8 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v5.5.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/exercise.rs:110:20 [INFO] [stdout] | [INFO] [stdout] 110 | 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] 110 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 2.90s [INFO] running `Command { std: "docker" "inspect" "ff677f4b4181b40ae8f34f7edd119ff70250bfaadb63e0bf34fef0946b6ef453", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ff677f4b4181b40ae8f34f7edd119ff70250bfaadb63e0bf34fef0946b6ef453", kill_on_drop: false }` [INFO] [stdout] ff677f4b4181b40ae8f34f7edd119ff70250bfaadb63e0bf34fef0946b6ef453 [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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] dc0b0e23c0788c3c88e94f6b3bc95aa92d899c1be7a954f00f40829b310730ab [INFO] running `Command { std: "docker" "start" "-a" "dc0b0e23c0788c3c88e94f6b3bc95aa92d899c1be7a954f00f40829b310730ab", kill_on_drop: false }` [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/exercise.rs:110:20 [INFO] [stderr] | [INFO] [stderr] 110 | 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] 110 | pub fn compile(&self) -> Result, ExerciseOutput> { [INFO] [stderr] | ++++ [INFO] [stderr] [INFO] [stderr] warning: `rustlings` (bin "rustlings") generated 1 warning (run `cargo fix --bin "rustlings" -p 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 0.08s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-4892639833d9a81b) [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' (25) panicked at src/exercise.rs:273:36: [INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" } [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x620e38b73e22 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x620e38b73e22 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x620e38b73e22 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9 [INFO] [stdout] 3: 0x620e38b73e22 - ::fmt::hb7e843cde1bc81a3 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26 [INFO] [stdout] 4: 0x620e38b849ca - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76 [INFO] [stdout] 5: 0x620e38b849ca - core::fmt::write::h952c506e2dbe9cff [INFO] [stdout] 6: 0x620e38b429b6 - std::io::default_write_fmt::hd23bd8145c03a23a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x620e38b429b6 - std::io::Write::write_fmt::hdd3314a2bd8a34bd [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13 [INFO] [stdout] 8: 0x620e38b53209 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9 [INFO] [stdout] 9: 0x620e38b53209 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27 [INFO] [stdout] 10: 0x620e38b530a1 - std::panicking::default_hook::h0134d220cc034c02 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9 [INFO] [stdout] 11: 0x620e38909dae - as core::ops::function::Fn>::call::hb2e68dca3970e3ca [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9 [INFO] [stdout] 12: 0x620e38909dae - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21 [INFO] [stdout] 13: 0x620e38b53482 - as core::ops::function::Fn>::call::haebee478d0f56cf4 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9 [INFO] [stdout] 14: 0x620e38b53482 - std::panicking::panic_with_hook::h8119b6db1fef734f [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13 [INFO] [stdout] 15: 0x620e38b532c8 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13 [INFO] [stdout] 16: 0x620e38b4e7a9 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18 [INFO] [stdout] 17: 0x620e38b3740d - __rustc[e4c6931bd8050421]::rust_begin_unwind [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5 [INFO] [stdout] 18: 0x620e38b8ccec - core::panicking::panic_fmt::hb1614a3ff6840071 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14 [INFO] [stdout] 19: 0x620e38b8c2f2 - core::result::unwrap_failed::h7d4c34940aded59c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1867:5 [INFO] [stdout] 20: 0x620e388e4b5c - core::result::Result::unwrap::h81769a3570b4773f [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1233:23 [INFO] [stdout] 21: 0x620e388e4b5c - rustlings::exercise::test::test_clean::he3ab614ac8de4c92 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:273:36 [INFO] [stdout] 22: 0x620e388e4f37 - rustlings::exercise::test::test_clean::{{closure}}::h89481ca24a844d8b [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:272:20 [INFO] [stdout] 23: 0x620e388e2036 - core::ops::function::FnOnce::call_once::h9a99b1ef9bb690ef [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 24: 0x620e38909bab - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 25: 0x620e38909bab - test::__rust_begin_short_backtrace::he30322a73a0e9ea6 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18 [INFO] [stdout] 26: 0x620e3891d57a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74 [INFO] [stdout] 27: 0x620e3891d57a - as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 28: 0x620e3891d57a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40 [INFO] [stdout] 29: 0x620e3891d57a - std::panicking::catch_unwind::h54b1de7ceab578bf [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19 [INFO] [stdout] 30: 0x620e3891d57a - std::panic::catch_unwind::h60c29b7a9d0246b1 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14 [INFO] [stdout] 31: 0x620e3891d57a - test::run_test_in_process::h6099b5f871379b13 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27 [INFO] [stdout] 32: 0x620e3891d57a - test::run_test::{{closure}}::h926ce0a38281a4c8 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43 [INFO] [stdout] 33: 0x620e388f79d4 - test::run_test::{{closure}}::h508de21a9afc7140 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41 [INFO] [stdout] 34: 0x620e388f79d4 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18 [INFO] [stdout] 35: 0x620e388fb292 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13 [INFO] [stdout] 36: 0x620e388fb292 - as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 37: 0x620e388fb292 - std::panicking::catch_unwind::do_call::h0bba3937b4892238 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40 [INFO] [stdout] 38: 0x620e388fb292 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19 [INFO] [stdout] 39: 0x620e388fb292 - std::panic::catch_unwind::hb2fa05d52ed0124e [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14 [INFO] [stdout] 40: 0x620e388fb292 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26 [INFO] [stdout] 41: 0x620e388fb292 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 42: 0x620e38b498af - as core::ops::function::FnOnce>::call_once::hf234e0d1d1d272ba [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9 [INFO] [stdout] 43: 0x620e38b498af - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17 [INFO] [stdout] 44: 0x7561249a6aa4 - [INFO] [stdout] 45: 0x756124a33a64 - 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' (26) panicked at src/exercise.rs:346:38: [INFO] [stdout] called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[1m\u{1b}[91merror\u{1b}[0m\u{1b}[1m: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetaTy5Siy\"\u{1b}[0m\n\n\u{1b}[1m\u{1b}[91merror\u{1b}[0m\u{1b}[1m: aborting due to 1 previous error\u{1b}[0m\n\n" } [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x620e38b73e22 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stdout] 1: 0x620e38b73e22 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stdout] 2: 0x620e38b73e22 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9 [INFO] [stdout] 3: 0x620e38b73e22 - ::fmt::hb7e843cde1bc81a3 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26 [INFO] [stdout] 4: 0x620e38b849ca - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76 [INFO] [stdout] 5: 0x620e38b849ca - core::fmt::write::h952c506e2dbe9cff [INFO] [stdout] 6: 0x620e38b429b6 - std::io::default_write_fmt::hd23bd8145c03a23a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11 [INFO] [stdout] 7: 0x620e38b429b6 - std::io::Write::write_fmt::hdd3314a2bd8a34bd [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13 [INFO] [stdout] 8: 0x620e38b53209 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9 [INFO] [stdout] 9: 0x620e38b53209 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27 [INFO] [stdout] 10: 0x620e38b530a1 - std::panicking::default_hook::h0134d220cc034c02 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9 [INFO] [stdout] 11: 0x620e38909dae - as core::ops::function::Fn>::call::hb2e68dca3970e3ca [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9 [INFO] [stdout] 12: 0x620e38909dae - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21 [INFO] [stdout] 13: 0x620e38b53482 - as core::ops::function::Fn>::call::haebee478d0f56cf4 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9 [INFO] [stdout] 14: 0x620e38b53482 - std::panicking::panic_with_hook::h8119b6db1fef734f [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13 [INFO] [stdout] 15: 0x620e38b532c8 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13 [INFO] [stdout] 16: 0x620e38b4e7a9 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18 [INFO] [stdout] 17: 0x620e38b3740d - __rustc[e4c6931bd8050421]::rust_begin_unwind [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5 [INFO] [stdout] 18: 0x620e38b8ccec - core::panicking::panic_fmt::hb1614a3ff6840071 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14 [INFO] [stdout] 19: 0x620e38b8c2f2 - core::result::unwrap_failed::h7d4c34940aded59c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1867:5 [INFO] [stdout] 20: 0x620e388e5988 - core::result::Result::unwrap::hf43a6f83e985b3fa [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1233:23 [INFO] [stdout] 21: 0x620e388e5988 - rustlings::exercise::test::test_exercise_with_output::h7f25aadc0bd8a767 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:346:38 [INFO] [stdout] 22: 0x620e388e5c07 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h3ed97f0e191f28a8 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:339:35 [INFO] [stdout] 23: 0x620e388e1fb6 - core::ops::function::FnOnce::call_once::h6a53c5b8f33672c2 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 24: 0x620e38909bab - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 25: 0x620e38909bab - test::__rust_begin_short_backtrace::he30322a73a0e9ea6 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18 [INFO] [stdout] 26: 0x620e3891d57a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74 [INFO] [stdout] 27: 0x620e3891d57a - as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 28: 0x620e3891d57a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40 [INFO] [stdout] 29: 0x620e3891d57a - std::panicking::catch_unwind::h54b1de7ceab578bf [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19 [INFO] [stdout] 30: 0x620e3891d57a - std::panic::catch_unwind::h60c29b7a9d0246b1 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14 [INFO] [stdout] 31: 0x620e3891d57a - test::run_test_in_process::h6099b5f871379b13 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27 [INFO] [stdout] 32: 0x620e3891d57a - test::run_test::{{closure}}::h926ce0a38281a4c8 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43 [INFO] [stdout] 33: 0x620e388f79d4 - test::run_test::{{closure}}::h508de21a9afc7140 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41 [INFO] [stdout] 34: 0x620e388f79d4 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18 [INFO] [stdout] 35: 0x620e388fb292 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13 [INFO] [stdout] 36: 0x620e388fb292 - as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9 [INFO] [stdout] 37: 0x620e388fb292 - std::panicking::catch_unwind::do_call::h0bba3937b4892238 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40 [INFO] [stdout] 38: 0x620e388fb292 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19 [INFO] [stdout] 39: 0x620e388fb292 - std::panic::catch_unwind::hb2fa05d52ed0124e [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14 [INFO] [stdout] 40: 0x620e388fb292 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29 [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26 [INFO] [stdout] 41: 0x620e388fb292 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5 [INFO] [stdout] 42: 0x620e38b498af - as core::ops::function::FnOnce>::call_once::hf234e0d1d1d272ba [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9 [INFO] [stdout] 43: 0x620e38b498af - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b [INFO] [stdout] at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17 [INFO] [stdout] 44: 0x7561249a6aa4 - [INFO] [stdout] 45: 0x756124a33a64 - 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 0.24s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass `--bin rustlings` [INFO] running `Command { std: "docker" "inspect" "dc0b0e23c0788c3c88e94f6b3bc95aa92d899c1be7a954f00f40829b310730ab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dc0b0e23c0788c3c88e94f6b3bc95aa92d899c1be7a954f00f40829b310730ab", kill_on_drop: false }` [INFO] [stdout] dc0b0e23c0788c3c88e94f6b3bc95aa92d899c1be7a954f00f40829b310730ab