[INFO] cloning repository https://github.com/hrjn/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hrjn/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhrjn%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhrjn%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c74fca62a1a0119de5baf19a914f60da96a3ef27
[INFO] testing hrjn/rustlings against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhrjn%2Frustlings" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hrjn/rustlings on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hrjn/rustlings
[INFO] finished tweaking git repo https://github.com/hrjn/rustlings
[INFO] tweaked toml for git repo https://github.com/hrjn/rustlings written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/hrjn/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 887b0a5a8673e3008129539b808618ddd379fb723fa62bd2d535939db1594968
[INFO] running `Command { std: "docker" "start" "-a" "887b0a5a8673e3008129539b808618ddd379fb723fa62bd2d535939db1594968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "887b0a5a8673e3008129539b808618ddd379fb723fa62bd2d535939db1594968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "887b0a5a8673e3008129539b808618ddd379fb723fa62bd2d535939db1594968", kill_on_drop: false }`
[INFO] [stdout] 887b0a5a8673e3008129539b808618ddd379fb723fa62bd2d535939db1594968
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5dfd30468d31be98b110cd6659d4dc704404dd36ab102768b752d7162a17f7e
[INFO] running `Command { std: "docker" "start" "-a" "d5dfd30468d31be98b110cd6659d4dc704404dd36ab102768b752d7162a17f7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
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[INFO] [stderr]    Compiling serde_derive v1.0.125
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[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling rustlings v4.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.47s
[INFO] running `Command { std: "docker" "inspect" "d5dfd30468d31be98b110cd6659d4dc704404dd36ab102768b752d7162a17f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5dfd30468d31be98b110cd6659d4dc704404dd36ab102768b752d7162a17f7e", kill_on_drop: false }`
[INFO] [stdout] d5dfd30468d31be98b110cd6659d4dc704404dd36ab102768b752d7162a17f7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25ae951db2eaad1a15194a5c08bf16ab9a9bc04d999fc249ef18fd92c19e9951
[INFO] running `Command { std: "docker" "start" "-a" "25ae951db2eaad1a15194a5c08bf16ab9a9bc04d999fc249ef18fd92c19e9951", kill_on_drop: false }`
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling predicates-tree v1.0.2
[INFO] [stderr]    Compiling predicates v1.0.7
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling rustlings v4.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 9.42s
[INFO] running `Command { std: "docker" "inspect" "25ae951db2eaad1a15194a5c08bf16ab9a9bc04d999fc249ef18fd92c19e9951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25ae951db2eaad1a15194a5c08bf16ab9a9bc04d999fc249ef18fd92c19e9951", kill_on_drop: false }`
[INFO] [stdout] 25ae951db2eaad1a15194a5c08bf16ab9a9bc04d999fc249ef18fd92c19e9951
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e643177f9e88959367f1e11458c7bffb19f261d34238bb6c69314e0deaf36622
[INFO] running `Command { std: "docker" "start" "-a" "e643177f9e88959367f1e11458c7bffb19f261d34238bb6c69314e0deaf36622", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustlings-71a8fac4b23211d2)
[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: ReadOnlyFilesystem, message: "Read-only file system" }', src/exercise.rs:270:36
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56401c6ef560 - std::backtrace_rs::backtrace::libunwind::trace::h99dbb39dca18857d
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x56401c6ef560 - std::backtrace_rs::backtrace::trace_unsynchronized::h832861927e9cfedf
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56401c6ef560 - std::sys_common::backtrace::_print_fmt::h3d18154c77dcf310
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x56401c6ef560 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he312f4ad5b9bb346
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x56401c71224c - core::fmt::write::h9a6d9c74526a6c1b
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x56401c6ec4a5 - std::io::Write::write_fmt::h65d36b96410d80d7
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x56401c6f16db - std::sys_common::backtrace::_print::h65d996766de40da4
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x56401c6f16db - std::sys_common::backtrace::print::h40df9727e635f303
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x56401c6f16db - std::panicking::default_hook::{{closure}}::hd2da4327dea91a51
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x56401c6f11ec - std::panicking::default_hook::h3d55120ad6ada158
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x56401c6f1da4 - std::panicking::rust_panic_with_hook::hf85dd0bb545e3b55
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x56401c6f1887 - std::panicking::begin_panic_handler::{{closure}}::h736ae969434da9fa
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x56401c6efa3c - std::sys_common::backtrace::__rust_end_short_backtrace::h6133bb80b1d6c3e0
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x56401c6f17e9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x56401c4fe8c1 - core::panicking::panic_fmt::hcf5f6d96e1dd7099
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x56401c4fe9b3 - core::result::unwrap_failed::he898b02f57993c42
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/result.rs:1599:5
[INFO] [stdout]   16:     0x56401c507f2e - core::result::Result<T,E>::unwrap::h8cff15843c68a188
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/result.rs:1281:23
[INFO] [stdout]   17:     0x56401c5030b3 - rustlings::exercise::test::test_clean::hcd09c71bc22209c1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:270:9
[INFO] [stdout]   18:     0x56401c50306a - rustlings::exercise::test::test_clean::{{closure}}::h308c4113b96dca88
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:5
[INFO] [stdout]   19:     0x56401c50c78e - core::ops::function::FnOnce::call_once::hfeac93de9c5dfbb1
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x56401c549023 - core::ops::function::FnOnce::call_once::h227fa683a5745bd3
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x56401c549023 - test::__rust_begin_short_backtrace::h3a193bd570ada00a
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:578:5
[INFO] [stdout]   22:     0x56401c547a98 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h262d2f411717179a
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   23:     0x56401c547a98 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hfec00caec3e52a7b
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x56401c547a98 - std::panicking::try::do_call::ha5f42e76ffda569d
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x56401c547a98 - std::panicking::try::h53f36df0935b9500
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x56401c547a98 - std::panic::catch_unwind::h5a497f74b0ce006f
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x56401c547a98 - test::run_test_in_process::hab0aead337f48a88
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:601:18
[INFO] [stdout]   28:     0x56401c547a98 - test::run_test::run_test_inner::{{closure}}::h632c383164d4cba2
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:493:39
[INFO] [stdout]   29:     0x56401c51621d - test::run_test::run_test_inner::{{closure}}::h7c4b3612891a4b58
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:520:37
[INFO] [stdout]   30:     0x56401c51621d - std::sys_common::backtrace::__rust_begin_short_backtrace::habf7d8a08419d00e
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x56401c51a948 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h3acba502e2068204
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/thread/mod.rs:476:17
[INFO] [stdout]   32:     0x56401c51a948 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h526ef819c1964a35
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x56401c51a948 - std::panicking::try::do_call::hc0b5663d6373cec8
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x56401c51a948 - std::panicking::try::ha9007ede9d35dcd6
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x56401c51a948 - std::panic::catch_unwind::hf60d56329ebbb81c
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x56401c51a948 - std::thread::Builder::spawn_unchecked::{{closure}}::hb1722d498f4ce777
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/thread/mod.rs:475:30
[INFO] [stdout]   37:     0x56401c51a948 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h15eb01325730c962
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x56401c6f6c07 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h09f167e08fc945ff
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   39:     0x56401c6f6c07 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf814fe85eeb118e0
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   40:     0x56401c6f6c07 - std::sys::unix::thread::Thread::new::thread_start::hb71b17934c5f5e68
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys/unix/thread.rs:91:17
[INFO] [stdout]   41:     0x7f3738de2609 - start_thread
[INFO] [stdout]   42:     0x7f3738f39293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[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_8_ThreadId3.testSuccess.7179e081-cgu.3.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:343:38
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56401c6ef560 - std::backtrace_rs::backtrace::libunwind::trace::h99dbb39dca18857d
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x56401c6ef560 - std::backtrace_rs::backtrace::trace_unsynchronized::h832861927e9cfedf
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56401c6ef560 - std::sys_common::backtrace::_print_fmt::h3d18154c77dcf310
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x56401c6ef560 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he312f4ad5b9bb346
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x56401c71224c - core::fmt::write::h9a6d9c74526a6c1b
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x56401c6ec4a5 - std::io::Write::write_fmt::h65d36b96410d80d7
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x56401c6f16db - std::sys_common::backtrace::_print::h65d996766de40da4
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x56401c6f16db - std::sys_common::backtrace::print::h40df9727e635f303
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x56401c6f16db - std::panicking::default_hook::{{closure}}::hd2da4327dea91a51
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x56401c6f11ec - std::panicking::default_hook::h3d55120ad6ada158
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x56401c6f1da4 - std::panicking::rust_panic_with_hook::hf85dd0bb545e3b55
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x56401c6f1887 - std::panicking::begin_panic_handler::{{closure}}::h736ae969434da9fa
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x56401c6efa3c - std::sys_common::backtrace::__rust_end_short_backtrace::h6133bb80b1d6c3e0
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x56401c6f17e9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x56401c4fe8c1 - core::panicking::panic_fmt::hcf5f6d96e1dd7099
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x56401c4fe9b3 - core::result::unwrap_failed::he898b02f57993c42
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/result.rs:1599:5
[INFO] [stdout]   16:     0x56401c507de3 - core::result::Result<T,E>::unwrap::h2b37dcedba88712c
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/result.rs:1281:23
[INFO] [stdout]   17:     0x56401c503cec - rustlings::exercise::test::test_exercise_with_output::h6a0a2d5d831fee64
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:343:19
[INFO] [stdout]   18:     0x56401c503baa - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h00cdceb0728268db
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:336:5
[INFO] [stdout]   19:     0x56401c50c74e - core::ops::function::FnOnce::call_once::hf170a48413e03601
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x56401c549023 - core::ops::function::FnOnce::call_once::h227fa683a5745bd3
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x56401c549023 - test::__rust_begin_short_backtrace::h3a193bd570ada00a
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:578:5
[INFO] [stdout]   22:     0x56401c547a98 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h262d2f411717179a
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   23:     0x56401c547a98 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hfec00caec3e52a7b
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x56401c547a98 - std::panicking::try::do_call::ha5f42e76ffda569d
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x56401c547a98 - std::panicking::try::h53f36df0935b9500
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x56401c547a98 - std::panic::catch_unwind::h5a497f74b0ce006f
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x56401c547a98 - test::run_test_in_process::hab0aead337f48a88
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:601:18
[INFO] [stdout]   28:     0x56401c547a98 - test::run_test::run_test_inner::{{closure}}::h632c383164d4cba2
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:493:39
[INFO] [stdout]   29:     0x56401c51621d - test::run_test::run_test_inner::{{closure}}::h7c4b3612891a4b58
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/test/src/lib.rs:520:37
[INFO] [stdout]   30:     0x56401c51621d - std::sys_common::backtrace::__rust_begin_short_backtrace::habf7d8a08419d00e
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x56401c51a948 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h3acba502e2068204
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/thread/mod.rs:476:17
[INFO] [stdout]   32:     0x56401c51a948 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h526ef819c1964a35
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x56401c51a948 - std::panicking::try::do_call::hc0b5663d6373cec8
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x56401c51a948 - std::panicking::try::ha9007ede9d35dcd6
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x56401c51a948 - std::panic::catch_unwind::hf60d56329ebbb81c
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x56401c51a948 - std::thread::Builder::spawn_unchecked::{{closure}}::hb1722d498f4ce777
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/thread/mod.rs:475:30
[INFO] [stdout]   37:     0x56401c51a948 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h15eb01325730c962
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x56401c6f6c07 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h09f167e08fc945ff
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   39:     0x56401c6f6c07 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf814fe85eeb118e0
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   40:     0x56401c6f6c07 - std::sys::unix::thread::Thread::new::thread_start::hb71b17934c5f5e68
[INFO] [stdout]                                at /rustc/b70888601af92f6cdc0364abab3446e418b91d36/library/std/src/sys/unix/thread.rs:91:17
[INFO] [stdout]   41:     0x7f3738de2609 - start_thread
[INFO] [stdout]   42:     0x7f3738f39293 - clone
[INFO] [stdout]   43:                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 0.13s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--bin rustlings'
[INFO] running `Command { std: "docker" "inspect" "e643177f9e88959367f1e11458c7bffb19f261d34238bb6c69314e0deaf36622", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e643177f9e88959367f1e11458c7bffb19f261d34238bb6c69314e0deaf36622", kill_on_drop: false }`
[INFO] [stdout] e643177f9e88959367f1e11458c7bffb19f261d34238bb6c69314e0deaf36622