[INFO] cloning repository https://github.com/ethanolx/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ethanolx/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethanolx%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethanolx%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4fbc0a5bc2a83b128a491f96024a0848cb979f1a
[INFO] testing ethanolx/rustlings against try#ed7f3d77595b4831fdf085f2529aa13b5b51ff7d for pr-134530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethanolx%2Frustlings" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ethanolx/rustlings on toolchain ed7f3d77595b4831fdf085f2529aa13b5b51ff7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ethanolx/rustlings
[INFO] finished tweaking git repo https://github.com/ethanolx/rustlings
[INFO] tweaked toml for git repo https://github.com/ethanolx/rustlings written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ethanolx/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" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing ethanolx/rustlings against try#ed7f3d77595b4831fdf085f2529aa13b5b51ff7d for pr-134530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethanolx%2Frustlings" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ethanolx/rustlings on toolchain ed7f3d77595b4831fdf085f2529aa13b5b51ff7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ethanolx/rustlings
[INFO] finished tweaking git repo https://github.com/ethanolx/rustlings
[INFO] tweaked toml for git repo https://github.com/ethanolx/rustlings written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ethanolx/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" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing ethanolx/rustlings against try#ed7f3d77595b4831fdf085f2529aa13b5b51ff7d for pr-134530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethanolx%2Frustlings" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ethanolx/rustlings on toolchain ed7f3d77595b4831fdf085f2529aa13b5b51ff7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ethanolx/rustlings
[INFO] finished tweaking git repo https://github.com/ethanolx/rustlings
[INFO] tweaked toml for git repo https://github.com/ethanolx/rustlings written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ethanolx/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" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9d5185841c197835ddd056b6a849b27d9f79c4bd32a2d16106d13ad9e08b125c
[INFO] running `Command { std: "docker" "start" "-a" "9d5185841c197835ddd056b6a849b27d9f79c4bd32a2d16106d13ad9e08b125c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d5185841c197835ddd056b6a849b27d9f79c4bd32a2d16106d13ad9e08b125c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d5185841c197835ddd056b6a849b27d9f79c4bd32a2d16106d13ad9e08b125c", kill_on_drop: false }`
[INFO] [stdout] 9d5185841c197835ddd056b6a849b27d9f79c4bd32a2d16106d13ad9e08b125c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19d9d830592ea04e5c7e355b36dfd3bf0ff1307b4e21705cd4cc465ea0534375
[INFO] running `Command { std: "docker" "start" "-a" "19d9d830592ea04e5c7e355b36dfd3bf0ff1307b4e21705cd4cc465ea0534375", 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 memchr v2.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling regex-syntax v0.7.4
[INFO] [stderr]    Compiling log v0.4.19
[INFO] [stderr]    Compiling serde_json v1.0.102
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling argh_shared v0.1.10
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling itoa v1.0.8
[INFO] [stderr]    Compiling ryu v1.0.14
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling home v0.5.5
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[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 console v0.15.7
[INFO] [stderr]    Compiling filetime v0.2.21
[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 serde_derive v1.0.171
[INFO] [stderr]    Compiling argh_derive v0.1.10
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.94s
[INFO] running `Command { std: "docker" "inspect" "19d9d830592ea04e5c7e355b36dfd3bf0ff1307b4e21705cd4cc465ea0534375", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19d9d830592ea04e5c7e355b36dfd3bf0ff1307b4e21705cd4cc465ea0534375", kill_on_drop: false }`
[INFO] [stdout] 19d9d830592ea04e5c7e355b36dfd3bf0ff1307b4e21705cd4cc465ea0534375
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87e75afb75fac17fc42b3a8f01aa7590184978921957bef8ebd7ae0143e4dc83
[INFO] running `Command { std: "docker" "start" "-a" "87e75afb75fac17fc42b3a8f01aa7590184978921957bef8ebd7ae0143e4dc83", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling predicates-tree v1.0.9
[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 v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "87e75afb75fac17fc42b3a8f01aa7590184978921957bef8ebd7ae0143e4dc83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87e75afb75fac17fc42b3a8f01aa7590184978921957bef8ebd7ae0143e4dc83", kill_on_drop: false }`
[INFO] [stdout] 87e75afb75fac17fc42b3a8f01aa7590184978921957bef8ebd7ae0143e4dc83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0c3abf73f19ff518f1c7cfae8968399cfd9fd7323b1fe15d96f1a9928f42fee6
[INFO] running `Command { std: "docker" "start" "-a" "0c3abf73f19ff518f1c7cfae8968399cfd9fd7323b1fe15d96f1a9928f42fee6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-b22e34abeed32dba)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test exercise::test::test_finished_exercise ... ok
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_clean ... FAILED
[INFO] [stdout] test exercise::test::test_exercise_with_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_clean stdout ----
[INFO] [stdout] thread 'exercise::test::test_clean' panicked at src/exercise.rs: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:     0x58abcec0bd4a - std::backtrace_rs::backtrace::libunwind::trace::h3dab7ffe210583a3
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x58abcec0bd4a - std::backtrace_rs::backtrace::trace_unsynchronized::h85ec3139dd4f9047
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x58abcec0bd4a - std::sys::backtrace::_print_fmt::h3447259688950eab
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x58abcec0bd4a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha8d24a0f27cc401d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x58abcec33483 - core::fmt::rt::Argument::fmt::h650b92642f481125
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x58abcec33483 - core::fmt::write::h5becf96591c394eb
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/fmt/mod.rs:1437:21
[INFO] [stdout]    6:     0x58abcec08983 - std::io::Write::write_fmt::h61fb565ee25d88c6
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/io/mod.rs:1887:15
[INFO] [stdout]    7:     0x58abcec0bb92 - std::sys::backtrace::BacktraceLock::print::hae1dc20f39b0ae80
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x58abcec0d1ce - std::panicking::default_hook::{{closure}}::hb3023fc9edf847a9
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:284:22
[INFO] [stdout]    9:     0x58abcec0cfd7 - std::panicking::default_hook::h271aee2d85880663
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:308:9
[INFO] [stdout]   10:     0x58abce9c1668 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbfe4f2a7834d388d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   11:     0x58abce9c1668 - test::test_main::{{closure}}::hbb7d4fde4185abc5
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x58abcec0d9e8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd4cbe0a9e8955cde
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   13:     0x58abcec0d9e8 - std::panicking::rust_panic_with_hook::he05f4a167c1908ac
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:825:13
[INFO] [stdout]   14:     0x58abcec0d69a - std::panicking::begin_panic_handler::{{closure}}::h79780775730ab9df
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:690:13
[INFO] [stdout]   15:     0x58abcec0c219 - std::sys::backtrace::__rust_end_short_backtrace::h753217146a30d8a2
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x58abcec0d32d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:681:5
[INFO] [stdout]   17:     0x58abcec31b10 - core::panicking::panic_fmt::h9ad4c3d87a3eb4ad
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x58abcec31f86 - core::result::unwrap_failed::h865c91c1a27f7a85
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x58abce9814da - core::result::Result<T,E>::unwrap::h04c2660565a86908
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x58abce9814da - rustlings::exercise::test::test_clean::h642e2e1090e7a117
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:273:9
[INFO] [stdout]   21:     0x58abce981417 - rustlings::exercise::test::test_clean::{{closure}}::hd2caff02c690d01c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:272:20
[INFO] [stdout]   22:     0x58abce97f076 - core::ops::function::FnOnce::call_once::hf3d6ea050d08cbb7
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x58abce9c62ab - core::ops::function::FnOnce::call_once::h651e3187cb632f8b
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x58abce9c62ab - test::__rust_begin_short_backtrace::hf087c08482082584
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x58abce9c5bb9 - test::run_test_in_process::{{closure}}::h028b11125eb38b18
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x58abce9c5bb9 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8a69fc59e5c0ffcd
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x58abce9c5bb9 - std::panicking::try::do_call::h53d2549af1773521
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:573:40
[INFO] [stdout]   28:     0x58abce9c5bb9 - std::panicking::try::h327579c208c8ae37
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:536:19
[INFO] [stdout]   29:     0x58abce9c5bb9 - std::panic::catch_unwind::hae7e4a4da155a27e
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x58abce9c5bb9 - test::run_test_in_process::hef0a7b0ac1ee3437
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x58abce9c5bb9 - test::run_test::{{closure}}::h007633ec4ae045b1
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x58abce98892a - test::run_test::{{closure}}::hf3a8c9852b545b46
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x58abce98892a - std::sys::backtrace::__rust_begin_short_backtrace::ha442d5d7942f6ee9
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x58abce98c396 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc8fd461cdc84b676
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x58abce98c396 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5a459cc955f063ed
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x58abce98c396 - std::panicking::try::do_call::hc249aed3a6c9c972
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:573:40
[INFO] [stdout]   37:     0x58abce98c396 - std::panicking::try::h649add41232b7ab3
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:536:19
[INFO] [stdout]   38:     0x58abce98c396 - std::panic::catch_unwind::h2fd522623ccd57b0
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x58abce98c396 - std::thread::Builder::spawn_unchecked_::{{closure}}::h685de412d0d20b6b
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x58abce98c396 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hf3391e711cf5434d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x58abcec11aeb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc98bb0f9729b604d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   42:     0x58abcec11aeb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3b479d8e9f1fef9f
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   43:     0x58abcec11aeb - std::sys::pal::unix::thread::Thread::new::thread_start::he3d5da9652362070
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x79b39d65aac3 - <unknown>
[INFO] [stdout]   45:     0x79b39d6eba04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exercise::test::test_exercise_with_output stdout ----
[INFO] [stdout] thread 'exercise::test::test_exercise_with_output' panicked at src/exercise.rs:346:38:
[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/./rmetahZNqlf\"\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:     0x58abcec0bd4a - std::backtrace_rs::backtrace::libunwind::trace::h3dab7ffe210583a3
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x58abcec0bd4a - std::backtrace_rs::backtrace::trace_unsynchronized::h85ec3139dd4f9047
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x58abcec0bd4a - std::sys::backtrace::_print_fmt::h3447259688950eab
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x58abcec0bd4a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha8d24a0f27cc401d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x58abcec33483 - core::fmt::rt::Argument::fmt::h650b92642f481125
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x58abcec33483 - core::fmt::write::h5becf96591c394eb
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/fmt/mod.rs:1437:21
[INFO] [stdout]    6:     0x58abcec08983 - std::io::Write::write_fmt::h61fb565ee25d88c6
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/io/mod.rs:1887:15
[INFO] [stdout]    7:     0x58abcec0bb92 - std::sys::backtrace::BacktraceLock::print::hae1dc20f39b0ae80
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x58abcec0d1ce - std::panicking::default_hook::{{closure}}::hb3023fc9edf847a9
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:284:22
[INFO] [stdout]    9:     0x58abcec0cfd7 - std::panicking::default_hook::h271aee2d85880663
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:308:9
[INFO] [stdout]   10:     0x58abce9c1668 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbfe4f2a7834d388d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   11:     0x58abce9c1668 - test::test_main::{{closure}}::hbb7d4fde4185abc5
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x58abcec0d9e8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd4cbe0a9e8955cde
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1984:9
[INFO] [stdout]   13:     0x58abcec0d9e8 - std::panicking::rust_panic_with_hook::he05f4a167c1908ac
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:825:13
[INFO] [stdout]   14:     0x58abcec0d69a - std::panicking::begin_panic_handler::{{closure}}::h79780775730ab9df
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:690:13
[INFO] [stdout]   15:     0x58abcec0c219 - std::sys::backtrace::__rust_end_short_backtrace::h753217146a30d8a2
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   16:     0x58abcec0d32d - rust_begin_unwind
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:681:5
[INFO] [stdout]   17:     0x58abcec31b10 - core::panicking::panic_fmt::h9ad4c3d87a3eb4ad
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panicking.rs:75:14
[INFO] [stdout]   18:     0x58abcec31f86 - core::result::unwrap_failed::h865c91c1a27f7a85
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x58abce98233a - core::result::Result<T,E>::unwrap::hafb74320ef2a6c30
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x58abce98233a - rustlings::exercise::test::test_exercise_with_output::h40aa9c43274ecf83
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:346:19
[INFO] [stdout]   21:     0x58abce982147 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::hc985eb16ea022024
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:339:35
[INFO] [stdout]   22:     0x58abce97eff6 - core::ops::function::FnOnce::call_once::h866ee5d2f151b66f
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x58abce9c62ab - core::ops::function::FnOnce::call_once::h651e3187cb632f8b
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x58abce9c62ab - test::__rust_begin_short_backtrace::hf087c08482082584
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x58abce9c5bb9 - test::run_test_in_process::{{closure}}::h028b11125eb38b18
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x58abce9c5bb9 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8a69fc59e5c0ffcd
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x58abce9c5bb9 - std::panicking::try::do_call::h53d2549af1773521
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:573:40
[INFO] [stdout]   28:     0x58abce9c5bb9 - std::panicking::try::h327579c208c8ae37
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:536:19
[INFO] [stdout]   29:     0x58abce9c5bb9 - std::panic::catch_unwind::hae7e4a4da155a27e
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x58abce9c5bb9 - test::run_test_in_process::hef0a7b0ac1ee3437
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x58abce9c5bb9 - test::run_test::{{closure}}::h007633ec4ae045b1
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x58abce98892a - test::run_test::{{closure}}::hf3a8c9852b545b46
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x58abce98892a - std::sys::backtrace::__rust_begin_short_backtrace::ha442d5d7942f6ee9
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   34:     0x58abce98c396 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc8fd461cdc84b676
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x58abce98c396 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5a459cc955f063ed
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x58abce98c396 - std::panicking::try::do_call::hc249aed3a6c9c972
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:573:40
[INFO] [stdout]   37:     0x58abce98c396 - std::panicking::try::h649add41232b7ab3
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panicking.rs:536:19
[INFO] [stdout]   38:     0x58abce98c396 - std::panic::catch_unwind::h2fd522623ccd57b0
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x58abce98c396 - std::thread::Builder::spawn_unchecked_::{{closure}}::h685de412d0d20b6b
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x58abce98c396 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hf3391e711cf5434d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x58abcec11aeb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc98bb0f9729b604d
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   42:     0x58abcec11aeb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3b479d8e9f1fef9f
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/alloc/src/boxed.rs:1970:9
[INFO] [stdout]   43:     0x58abcec11aeb - std::sys::pal::unix::thread::Thread::new::thread_start::he3d5da9652362070
[INFO] [stdout]                                at /rustc/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x79b39d65aac3 - <unknown>
[INFO] [stdout]   45:     0x79b39d6eba04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exercise::test::test_clean
[INFO] [stdout]     exercise::test::test_exercise_with_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "0c3abf73f19ff518f1c7cfae8968399cfd9fd7323b1fe15d96f1a9928f42fee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c3abf73f19ff518f1c7cfae8968399cfd9fd7323b1fe15d96f1a9928f42fee6", kill_on_drop: false }`
[INFO] [stdout] 0c3abf73f19ff518f1c7cfae8968399cfd9fd7323b1fe15d96f1a9928f42fee6