[INFO] updating cached repository https://github.com/NovemberTang/rustlings [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }` [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ab2a000176b3d3a561ee8eaee861ec0181eaa2de [INFO] testing NovemberTang/rustlings against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNovemberTang%2Frustlings" "/workspace/builds/worker-1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/NovemberTang/rustlings on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/NovemberTang/rustlings [INFO] finished tweaking git repo https://github.com/NovemberTang/rustlings [INFO] tweaked toml for git repo https://github.com/NovemberTang/rustlings written to /workspace/builds/worker-1/source/Cargo.toml [INFO] crate git repo https://github.com/NovemberTang/rustlings already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5aa0018b39f602cdf2f560b804e966c3cb69269ffff4909ed0785c5ed6f8dbef [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "5aa0018b39f602cdf2f560b804e966c3cb69269ffff4909ed0785c5ed6f8dbef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5aa0018b39f602cdf2f560b804e966c3cb69269ffff4909ed0785c5ed6f8dbef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5aa0018b39f602cdf2f560b804e966c3cb69269ffff4909ed0785c5ed6f8dbef", kill_on_drop: false }` [INFO] [stdout] 5aa0018b39f602cdf2f560b804e966c3cb69269ffff4909ed0785c5ed6f8dbef [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1ec000ee6385120411b61a86f5213e49581ad371ac5abdff1404c4de725da463 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "1ec000ee6385120411b61a86f5213e49581ad371ac5abdff1404c4de725da463", kill_on_drop: false }` [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling lazy_static v1.3.0 [INFO] [stderr] Compiling unicode-width v0.1.5 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling same-file v1.0.4 [INFO] [stderr] Compiling vec_map v0.8.1 [INFO] [stderr] Compiling ansi_term v0.11.0 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling regex-syntax v0.6.6 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling thread_local v0.3.6 [INFO] [stderr] Compiling aho-corasick v0.7.3 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling termios v0.3.1 [INFO] [stderr] Compiling iovec v0.1.2 [INFO] [stderr] Compiling net2 v0.2.33 [INFO] [stderr] Compiling clicolors-control v1.0.0 [INFO] [stderr] Compiling inotify-sys v0.1.3 [INFO] [stderr] Compiling atty v0.2.11 [INFO] [stderr] Compiling filetime v0.2.5 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling walkdir v2.2.7 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling inotify v0.7.0 [INFO] [stderr] Compiling mio v0.6.19 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling mio-extras v2.0.5 [INFO] [stderr] Compiling notify v4.0.15 [INFO] [stderr] Compiling number_prefix v0.2.8 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Compiling console v0.8.0 [INFO] [stderr] Compiling console v0.7.7 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Compiling indicatif v0.10.3 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v3.0.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 30s [INFO] running `Command { std: "docker" "inspect" "1ec000ee6385120411b61a86f5213e49581ad371ac5abdff1404c4de725da463", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1ec000ee6385120411b61a86f5213e49581ad371ac5abdff1404c4de725da463", kill_on_drop: false }` [INFO] [stdout] 1ec000ee6385120411b61a86f5213e49581ad371ac5abdff1404c4de725da463 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 80ff444227d71332be7b914a7401db0e99287eec736ac3848b8bee7859945f34 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "80ff444227d71332be7b914a7401db0e99287eec736ac3848b8bee7859945f34", kill_on_drop: false }` [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling predicates-core v1.0.0 [INFO] [stderr] Compiling treeline v0.1.0 [INFO] [stderr] Compiling difference v2.0.0 [INFO] [stderr] Compiling normalize-line-endings v0.2.2 [INFO] [stderr] Compiling float-cmp v0.4.0 [INFO] [stderr] Compiling serde_json v1.0.39 [INFO] [stderr] Compiling predicates-tree v1.0.0 [INFO] [stderr] Compiling predicates v1.0.1 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v3.0.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 12.75s [INFO] running `Command { std: "docker" "inspect" "80ff444227d71332be7b914a7401db0e99287eec736ac3848b8bee7859945f34", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "80ff444227d71332be7b914a7401db0e99287eec736ac3848b8bee7859945f34", kill_on_drop: false }` [INFO] [stdout] 80ff444227d71332be7b914a7401db0e99287eec736ac3848b8bee7859945f34 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] c338912e720d74ac892722c75ed1703a688bdb168f28aff4a2301671d491d019 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "c338912e720d74ac892722c75ed1703a688bdb168f28aff4a2301671d491d019", kill_on_drop: false }` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.17s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rustlings-1777e0e836440e64 [INFO] [stdout] [INFO] [stdout] running 4 tests [INFO] [stdout] test exercise::test::test_finished_exercise ... ok [INFO] [stdout] test exercise::test::test_pending_state ... ok [INFO] [stdout] test exercise::test::test_clean ... FAILED [INFO] [stdout] test exercise::test::test_exercise_with_output ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- exercise::test::test_clean stdout ---- [INFO] [stdout] thread 'exercise::test::test_clean' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/exercise.rs:249:36 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x55bfc2016dd5 - backtrace::backtrace::libunwind::trace::hea89dfbbfe67f40d [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x55bfc2016dd5 - backtrace::backtrace::trace_unsynchronized::h0513dd713d7644d4 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x55bfc2016dd5 - std::sys_common::backtrace::_print_fmt::h040abae64e4a24a9 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x55bfc2016dd5 - ::fmt::hb4bdb37c3c335733 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x55bfc203f0ec - core::fmt::write::h540ac4a6a1232abc [INFO] [stdout] at src/libcore/fmt/mod.rs:1076 [INFO] [stdout] 5: 0x55bfc1e38ae5 - std::io::Write::write_fmt::h4be0daababb55bba [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/io/mod.rs:1539 [INFO] [stdout] 6: 0x55bfc2011161 - std::io::impls::>::write_fmt::h83c1e1aa73f374f5 [INFO] [stdout] at src/libstd/io/impls.rs:176 [INFO] [stdout] 7: 0x55bfc2019530 - std::sys_common::backtrace::_print::hb55cc635eaf1882e [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x55bfc2019530 - std::sys_common::backtrace::print::h2b2218fa55714084 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x55bfc2019530 - std::panicking::default_hook::{{closure}}::h578517c025765cf3 [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x55bfc201922a - std::panicking::default_hook::h4cafc94c2fc640fb [INFO] [stdout] at src/libstd/panicking.rs:214 [INFO] [stdout] 11: 0x55bfc2019b73 - std::panicking::rust_panic_with_hook::h3eeb5001beeca5c3 [INFO] [stdout] at src/libstd/panicking.rs:526 [INFO] [stdout] 12: 0x55bfc201976b - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:437 [INFO] [stdout] 13: 0x55bfc203da81 - core::panicking::panic_fmt::h78830ea6a34e7206 [INFO] [stdout] at src/libcore/panicking.rs:85 [INFO] [stdout] 14: 0x55bfc203d8a3 - core::option::expect_none_failed::hf79bbb5ca7e09e08 [INFO] [stdout] at src/libcore/option.rs:1269 [INFO] [stdout] 15: 0x55bfc1e32c0b - core::result::Result::unwrap::ha7f78f1e1c572e43 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/result.rs:1005 [INFO] [stdout] 16: 0x55bfc1e312f4 - rustlings::exercise::test::test_clean::hd169ef4b56a29499 [INFO] [stdout] at src/exercise.rs:249 [INFO] [stdout] 17: 0x55bfc1e3129a - rustlings::exercise::test::test_clean::{{closure}}::hd4d981a3be7d90bd [INFO] [stdout] at src/exercise.rs:248 [INFO] [stdout] 18: 0x55bfc1e2a20e - core::ops::function::FnOnce::call_once::h93c5758a61dbefcd [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/ops/function.rs:233 [INFO] [stdout] 19: 0x55bfc1e6005c - as core::ops::function::FnOnce>::call_once::h8340ba6798e0c4ff [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 20: 0x55bfc1e6005c - as core::ops::function::FnOnce<()>>::call_once::h5590e98676605094 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:318 [INFO] [stdout] 21: 0x55bfc1e6005c - std::panicking::try::do_call::hd8680a2dbb0ed3c4 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:348 [INFO] [stdout] 22: 0x55bfc1e6005c - std::panicking::try::h46b4de2d705e7a8d [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:325 [INFO] [stdout] 23: 0x55bfc1e6005c - std::panic::catch_unwind::h059b3f06991e0a9c [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:394 [INFO] [stdout] 24: 0x55bfc1e6005c - test::run_test_in_process::h5ae08a65430494a4 [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 25: 0x55bfc1e6005c - test::run_test::run_test_inner::{{closure}}::h4b36073838376ae8 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 26: 0x55bfc1e37fd6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h0169d0be588b8bf0 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 27: 0x55bfc1e3cfc5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h71bfc37e887d3973 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/thread/mod.rs:475 [INFO] [stdout] 28: 0x55bfc1e3cfc5 - as core::ops::function::FnOnce<()>>::call_once::h36c65072907dc180 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:318 [INFO] [stdout] 29: 0x55bfc1e3cfc5 - std::panicking::try::do_call::h4e0f426e17cd216c [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:348 [INFO] [stdout] 30: 0x55bfc1e3cfc5 - std::panicking::try::hd05e4ef6b4303d29 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:325 [INFO] [stdout] 31: 0x55bfc1e3cfc5 - std::panic::catch_unwind::h19a1127ec729c5dd [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:394 [INFO] [stdout] 32: 0x55bfc1e3cfc5 - std::thread::Builder::spawn_unchecked::{{closure}}::h011300735f06b1e2 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/thread/mod.rs:474 [INFO] [stdout] 33: 0x55bfc1e3cfc5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h1e3c55f31f1d122e [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/ops/function.rs:233 [INFO] [stdout] 34: 0x55bfc201feea - as core::ops::function::FnOnce>::call_once::hc0e15d78a519721e [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 35: 0x55bfc201feea - as core::ops::function::FnOnce>::call_once::h211da8fffb09f192 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 36: 0x55bfc201feea - std::sys::unix::thread::Thread::new::thread_start::h29594ddebf23e421 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 37: 0x7f7de6af2609 - start_thread [INFO] [stdout] 38: 0x7f7de6c34103 - __clone [INFO] [stdout] 39: 0x0 - [INFO] [stdout] [INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ---- [INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at 'called `Result::unwrap()` on an `Err` value: ExerciseOutput { stdout: "", stderr: "\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: could not write output to ./temp_120.4n7cv8jstgdhyzzp.rcgu.o: Read-only file system\u{1b}[0m\n\n\u{1b}[0m\u{1b}[1m\u{1b}[38;5;9merror\u{1b}[0m\u{1b}[0m\u{1b}[1m: aborting due to previous error\u{1b}[0m\n\n" }', src/exercise.rs:322:38 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x55bfc2016dd5 - backtrace::backtrace::libunwind::trace::hea89dfbbfe67f40d [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x55bfc2016dd5 - backtrace::backtrace::trace_unsynchronized::h0513dd713d7644d4 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x55bfc2016dd5 - std::sys_common::backtrace::_print_fmt::h040abae64e4a24a9 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x55bfc2016dd5 - ::fmt::hb4bdb37c3c335733 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x55bfc203f0ec - core::fmt::write::h540ac4a6a1232abc [INFO] [stdout] at src/libcore/fmt/mod.rs:1076 [INFO] [stdout] 5: 0x55bfc1e38ae5 - std::io::Write::write_fmt::h4be0daababb55bba [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/io/mod.rs:1539 [INFO] [stdout] 6: 0x55bfc2011161 - std::io::impls::>::write_fmt::h83c1e1aa73f374f5 [INFO] [stdout] at src/libstd/io/impls.rs:176 [INFO] [stdout] 7: 0x55bfc2019530 - std::sys_common::backtrace::_print::hb55cc635eaf1882e [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x55bfc2019530 - std::sys_common::backtrace::print::h2b2218fa55714084 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x55bfc2019530 - std::panicking::default_hook::{{closure}}::h578517c025765cf3 [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x55bfc201922a - std::panicking::default_hook::h4cafc94c2fc640fb [INFO] [stdout] at src/libstd/panicking.rs:214 [INFO] [stdout] 11: 0x55bfc2019b73 - std::panicking::rust_panic_with_hook::h3eeb5001beeca5c3 [INFO] [stdout] at src/libstd/panicking.rs:526 [INFO] [stdout] 12: 0x55bfc201976b - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:437 [INFO] [stdout] 13: 0x55bfc203da81 - core::panicking::panic_fmt::h78830ea6a34e7206 [INFO] [stdout] at src/libcore/panicking.rs:85 [INFO] [stdout] 14: 0x55bfc203d8a3 - core::option::expect_none_failed::hf79bbb5ca7e09e08 [INFO] [stdout] at src/libcore/option.rs:1269 [INFO] [stdout] 15: 0x55bfc1e32cbc - core::result::Result::unwrap::hbacde4f659ed575d [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/result.rs:1005 [INFO] [stdout] 16: 0x55bfc1e320b4 - rustlings::exercise::test::test_exercise_with_output::h81d70f52e21ad7ed [INFO] [stdout] at src/exercise.rs:322 [INFO] [stdout] 17: 0x55bfc1e31faa - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hcc4dfb29b96a5eff [INFO] [stdout] at src/exercise.rs:315 [INFO] [stdout] 18: 0x55bfc1e2a13e - core::ops::function::FnOnce::call_once::h043a1c26ed434bad [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/ops/function.rs:233 [INFO] [stdout] 19: 0x55bfc1e6005c - as core::ops::function::FnOnce>::call_once::h8340ba6798e0c4ff [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 20: 0x55bfc1e6005c - as core::ops::function::FnOnce<()>>::call_once::h5590e98676605094 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:318 [INFO] [stdout] 21: 0x55bfc1e6005c - std::panicking::try::do_call::hd8680a2dbb0ed3c4 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:348 [INFO] [stdout] 22: 0x55bfc1e6005c - std::panicking::try::h46b4de2d705e7a8d [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:325 [INFO] [stdout] 23: 0x55bfc1e6005c - std::panic::catch_unwind::h059b3f06991e0a9c [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:394 [INFO] [stdout] 24: 0x55bfc1e6005c - test::run_test_in_process::h5ae08a65430494a4 [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 25: 0x55bfc1e6005c - test::run_test::run_test_inner::{{closure}}::h4b36073838376ae8 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 26: 0x55bfc1e37fd6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h0169d0be588b8bf0 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 27: 0x55bfc1e3cfc5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h71bfc37e887d3973 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/thread/mod.rs:475 [INFO] [stdout] 28: 0x55bfc1e3cfc5 - as core::ops::function::FnOnce<()>>::call_once::h36c65072907dc180 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:318 [INFO] [stdout] 29: 0x55bfc1e3cfc5 - std::panicking::try::do_call::h4e0f426e17cd216c [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:348 [INFO] [stdout] 30: 0x55bfc1e3cfc5 - std::panicking::try::hd05e4ef6b4303d29 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panicking.rs:325 [INFO] [stdout] 31: 0x55bfc1e3cfc5 - std::panic::catch_unwind::h19a1127ec729c5dd [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/panic.rs:394 [INFO] [stdout] 32: 0x55bfc1e3cfc5 - std::thread::Builder::spawn_unchecked::{{closure}}::h011300735f06b1e2 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libstd/thread/mod.rs:474 [INFO] [stdout] 33: 0x55bfc1e3cfc5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h1e3c55f31f1d122e [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/libcore/ops/function.rs:233 [INFO] [stdout] 34: 0x55bfc201feea - as core::ops::function::FnOnce>::call_once::hc0e15d78a519721e [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 35: 0x55bfc201feea - as core::ops::function::FnOnce>::call_once::h211da8fffb09f192 [INFO] [stdout] at /rustc/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/src/liballoc/boxed.rs:1081 [INFO] [stdout] 36: 0x55bfc201feea - std::sys::unix::thread::Thread::new::thread_start::h29594ddebf23e421 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 37: 0x7f7de6af2609 - start_thread [INFO] [stdout] 38: 0x7f7de6c34103 - __clone [INFO] [stdout] 39: 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 [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--bin rustlings' [INFO] running `Command { std: "docker" "inspect" "c338912e720d74ac892722c75ed1703a688bdb168f28aff4a2301671d491d019", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c338912e720d74ac892722c75ed1703a688bdb168f28aff4a2301671d491d019", kill_on_drop: false }` [INFO] [stdout] c338912e720d74ac892722c75ed1703a688bdb168f28aff4a2301671d491d019