[INFO] cloning repository https://github.com/cicvedu/rust-rustlings-leewise1118
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cicvedu/rust-rustlings-leewise1118" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcicvedu%2Frust-rustlings-leewise1118", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcicvedu%2Frust-rustlings-leewise1118'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a538116a9ebcc589f77ed3cacf761911e2fabda
[INFO] testing cicvedu/rust-rustlings-leewise1118 against master#23949593103d03a82c7ebc2e84434ce6c6edc561 for pr-115235-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcicvedu%2Frust-rustlings-leewise1118" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cicvedu/rust-rustlings-leewise1118 on toolchain 23949593103d03a82c7ebc2e84434ce6c6edc561
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cicvedu/rust-rustlings-leewise1118
[INFO] finished tweaking git repo https://github.com/cicvedu/rust-rustlings-leewise1118
[INFO] tweaked toml for git repo https://github.com/cicvedu/rust-rustlings-leewise1118 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cicvedu/rust-rustlings-leewise1118 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" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a7c5360fb322e522e08ff79c07d4121d0762c47e2aec4b89c4d8fb33a59e491
[INFO] running `Command { std: "docker" "start" "-a" "1a7c5360fb322e522e08ff79c07d4121d0762c47e2aec4b89c4d8fb33a59e491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a7c5360fb322e522e08ff79c07d4121d0762c47e2aec4b89c4d8fb33a59e491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a7c5360fb322e522e08ff79c07d4121d0762c47e2aec4b89c4d8fb33a59e491", kill_on_drop: false }`
[INFO] [stdout] 1a7c5360fb322e522e08ff79c07d4121d0762c47e2aec4b89c4d8fb33a59e491
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78f6b01f9c8899d8dec21ac53152297f8a87d8382bd361e0850dbe787ecaf87e
[INFO] running `Command { std: "docker" "start" "-a" "78f6b01f9c8899d8dec21ac53152297f8a87d8382bd361e0850dbe787ecaf87e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
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[INFO] [stderr]    Compiling memchr v2.5.0
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[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling cfg-if v0.1.10
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[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.90s
[INFO] running `Command { std: "docker" "inspect" "78f6b01f9c8899d8dec21ac53152297f8a87d8382bd361e0850dbe787ecaf87e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78f6b01f9c8899d8dec21ac53152297f8a87d8382bd361e0850dbe787ecaf87e", kill_on_drop: false }`
[INFO] [stdout] 78f6b01f9c8899d8dec21ac53152297f8a87d8382bd361e0850dbe787ecaf87e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8a92fa43330d67138335044b5d8f6934131054d19601baf32b7e2a985b149c8
[INFO] running `Command { std: "docker" "start" "-a" "b8a92fa43330d67138335044b5d8f6934131054d19601baf32b7e2a985b149c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difference v2.0.0
[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 [unoptimized + debuginfo] target(s) in 8.85s
[INFO] running `Command { std: "docker" "inspect" "b8a92fa43330d67138335044b5d8f6934131054d19601baf32b7e2a985b149c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a92fa43330d67138335044b5d8f6934131054d19601baf32b7e2a985b149c8", kill_on_drop: false }`
[INFO] [stdout] b8a92fa43330d67138335044b5d8f6934131054d19601baf32b7e2a985b149c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 29afb150ab009b493f07910b617f16c77787873d6ead7b8d5b10dd4783dcbd1c
[INFO] running `Command { std: "docker" "start" "-a" "29afb150ab009b493f07910b617f16c77787873d6ead7b8d5b10dd4783dcbd1c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-daffc2e912909c31)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test exercise::test::test_pending_state ... ok
[INFO] [stdout] test exercise::test::test_finished_exercise ... 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:303:36:
[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:     0x55c742da6dcc - std::backtrace_rs::backtrace::libunwind::trace::hc56bfd85f78f2ac1
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x55c742da6dcc - std::backtrace_rs::backtrace::trace_unsynchronized::h3a4cd0ee39c2ec51
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55c742da6dcc - std::sys_common::backtrace::_print_fmt::h7ec874d1114e2ca4
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x55c742da6dcc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9409967845944e27
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55c742dd11bc - core::fmt::rt::Argument::fmt::h3548c9d6e288e4b2
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/fmt/rt.rs:138:9
[INFO] [stdout]    5:     0x55c742dd11bc - core::fmt::write::h31bd00fc0f85031b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/fmt/mod.rs:1094:21
[INFO] [stdout]    6:     0x55c742da3e6e - std::io::Write::write_fmt::hd97b56c28d49e8d5
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/io/mod.rs:1714:15
[INFO] [stdout]    7:     0x55c742da6bb4 - std::sys_common::backtrace::_print::h8ab9a59ea8fc9a86
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55c742da6bb4 - std::sys_common::backtrace::print::hfe7afa943e316a5b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55c742da8b7a - std::panicking::panic_hook_with_disk_dump::{{closure}}::hae52bf9a035c21dd
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:280:22
[INFO] [stdout]   10:     0x55c742da873d - std::panicking::panic_hook_with_disk_dump::hb6c613677d0ff679
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:311:9
[INFO] [stdout]   11:     0x55c742b30e5c - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h70da65d4ac9eaaa2
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x55c742b30e5c - test::test_main::{{closure}}::h436fe668754d7667
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x55c742da9303 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h98627c2cfbd34c2e
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x55c742da9303 - std::panicking::rust_panic_with_hook::hd82d7066cdf9e06f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:757:13
[INFO] [stdout]   15:     0x55c742da9081 - std::panicking::begin_panic_handler::{{closure}}::hf97c71166d409481
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:631:13
[INFO] [stdout]   16:     0x55c742da72f6 - std::sys_common::backtrace::__rust_end_short_backtrace::haa22df65c16edaa5
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x55c742da8dc2 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:619:5
[INFO] [stdout]   18:     0x55c742ae7ba5 - core::panicking::panic_fmt::h0e243d6d1945608c
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55c742ae8173 - core::result::unwrap_failed::h0462c3c2bed88698
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/result.rs:1652:5
[INFO] [stdout]   20:     0x55c742af085b - core::result::Result<T,E>::unwrap::he47186ebeb9b6650
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55c742af1131 - rustlings::exercise::test::test_clean::h55952a558191b6f4
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:303:9
[INFO] [stdout]   22:     0x55c742af10b7 - rustlings::exercise::test::test_clean::{{closure}}::h1a872d5850d5c27e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:302:21
[INFO] [stdout]   23:     0x55c742aef736 - core::ops::function::FnOnce::call_once::h58348faafabbe0e0
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55c742b35f8f - core::ops::function::FnOnce::call_once::hf5a9c4e4ad819183
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55c742b35f8f - test::__rust_begin_short_backtrace::ha85af04d2b493cbd
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:626:18
[INFO] [stdout]   26:     0x55c742b34f7e - test::run_test_in_process::{{closure}}::h80bae6710d6987aa
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:649:60
[INFO] [stdout]   27:     0x55c742b34f7e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1e8456d02dd6a27f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   28:     0x55c742b34f7e - std::panicking::try::do_call::h70bdb29e697eb37f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:526:40
[INFO] [stdout]   29:     0x55c742b34f7e - std::panicking::try::hac0a5b5cab93a94f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:490:19
[INFO] [stdout]   30:     0x55c742b34f7e - std::panic::catch_unwind::h242aae5a8ee61348
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55c742b34f7e - test::run_test_in_process::hb95e3471d249e80a
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:649:27
[INFO] [stdout]   32:     0x55c742b34f7e - test::run_test::{{closure}}::he4945c759a6bb284
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:572:43
[INFO] [stdout]   33:     0x55c742afd833 - test::run_test::{{closure}}::hef3ab237ad9dfdfa
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:600:41
[INFO] [stdout]   34:     0x55c742afd833 - std::sys_common::backtrace::__rust_begin_short_backtrace::hd6c3f5e9450d872a
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   35:     0x55c742b0292b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h033a4dc4b24e2ae4
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   36:     0x55c742b0292b - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hf6ace37e8c04836b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   37:     0x55c742b0292b - std::panicking::try::do_call::h873acc9efc68dde9
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:526:40
[INFO] [stdout]   38:     0x55c742b0292b - std::panicking::try::hf1c7b0cddd2a156c
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:490:19
[INFO] [stdout]   39:     0x55c742b0292b - std::panic::catch_unwind::hd0800cc038b1a0e3
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x55c742b0292b - std::thread::Builder::spawn_unchecked_::{{closure}}::hbd3f2581a283969b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   41:     0x55c742b0292b - core::ops::function::FnOnce::call_once{{vtable.shim}}::h05a4474bc37631e7
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55c742dadb05 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha81bceedc5dd4605
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   43:     0x55c742dadb05 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha86fb738f82c9cc8
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   44:     0x55c742dadb05 - std::sys::unix::thread::Thread::new::thread_start::h2c80c44f64da2074
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f858bc70b43 - <unknown>
[INFO] [stdout]   46:     0x7f858bd01bb4 - __clone
[INFO] [stdout]   47:                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:376:38:
[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/./rmetaZsCJ5u\"\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" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55c742da6dcc - std::backtrace_rs::backtrace::libunwind::trace::hc56bfd85f78f2ac1
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x55c742da6dcc - std::backtrace_rs::backtrace::trace_unsynchronized::h3a4cd0ee39c2ec51
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55c742da6dcc - std::sys_common::backtrace::_print_fmt::h7ec874d1114e2ca4
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x55c742da6dcc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9409967845944e27
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55c742dd11bc - core::fmt::rt::Argument::fmt::h3548c9d6e288e4b2
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/fmt/rt.rs:138:9
[INFO] [stdout]    5:     0x55c742dd11bc - core::fmt::write::h31bd00fc0f85031b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/fmt/mod.rs:1094:21
[INFO] [stdout]    6:     0x55c742da3e6e - std::io::Write::write_fmt::hd97b56c28d49e8d5
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/io/mod.rs:1714:15
[INFO] [stdout]    7:     0x55c742da6bb4 - std::sys_common::backtrace::_print::h8ab9a59ea8fc9a86
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55c742da6bb4 - std::sys_common::backtrace::print::hfe7afa943e316a5b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55c742da8b7a - std::panicking::panic_hook_with_disk_dump::{{closure}}::hae52bf9a035c21dd
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:280:22
[INFO] [stdout]   10:     0x55c742da873d - std::panicking::panic_hook_with_disk_dump::hb6c613677d0ff679
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:311:9
[INFO] [stdout]   11:     0x55c742b30e5c - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h70da65d4ac9eaaa2
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x55c742b30e5c - test::test_main::{{closure}}::h436fe668754d7667
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:136:21
[INFO] [stdout]   13:     0x55c742da9303 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h98627c2cfbd34c2e
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x55c742da9303 - std::panicking::rust_panic_with_hook::hd82d7066cdf9e06f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:757:13
[INFO] [stdout]   15:     0x55c742da9081 - std::panicking::begin_panic_handler::{{closure}}::hf97c71166d409481
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:631:13
[INFO] [stdout]   16:     0x55c742da72f6 - std::sys_common::backtrace::__rust_end_short_backtrace::haa22df65c16edaa5
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x55c742da8dc2 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:619:5
[INFO] [stdout]   18:     0x55c742ae7ba5 - core::panicking::panic_fmt::h0e243d6d1945608c
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55c742ae8173 - core::result::unwrap_failed::h0462c3c2bed88698
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/result.rs:1652:5
[INFO] [stdout]   20:     0x55c742af06fb - core::result::Result<T,E>::unwrap::h1cea933f8512782f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55c742af1e4c - rustlings::exercise::test::test_exercise_with_output::hd7a0520fcefeb2cc
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:376:19
[INFO] [stdout]   22:     0x55c742af1ce7 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h742add07e2df226c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:369:36
[INFO] [stdout]   23:     0x55c742aef7b6 - core::ops::function::FnOnce::call_once::h77eab80935761a3d
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55c742b35f8f - core::ops::function::FnOnce::call_once::hf5a9c4e4ad819183
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55c742b35f8f - test::__rust_begin_short_backtrace::ha85af04d2b493cbd
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:626:18
[INFO] [stdout]   26:     0x55c742b34f7e - test::run_test_in_process::{{closure}}::h80bae6710d6987aa
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:649:60
[INFO] [stdout]   27:     0x55c742b34f7e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1e8456d02dd6a27f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   28:     0x55c742b34f7e - std::panicking::try::do_call::h70bdb29e697eb37f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:526:40
[INFO] [stdout]   29:     0x55c742b34f7e - std::panicking::try::hac0a5b5cab93a94f
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:490:19
[INFO] [stdout]   30:     0x55c742b34f7e - std::panic::catch_unwind::h242aae5a8ee61348
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55c742b34f7e - test::run_test_in_process::hb95e3471d249e80a
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:649:27
[INFO] [stdout]   32:     0x55c742b34f7e - test::run_test::{{closure}}::he4945c759a6bb284
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:572:43
[INFO] [stdout]   33:     0x55c742afd833 - test::run_test::{{closure}}::hef3ab237ad9dfdfa
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/test/src/lib.rs:600:41
[INFO] [stdout]   34:     0x55c742afd833 - std::sys_common::backtrace::__rust_begin_short_backtrace::hd6c3f5e9450d872a
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   35:     0x55c742b0292b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h033a4dc4b24e2ae4
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   36:     0x55c742b0292b - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hf6ace37e8c04836b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   37:     0x55c742b0292b - std::panicking::try::do_call::h873acc9efc68dde9
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:526:40
[INFO] [stdout]   38:     0x55c742b0292b - std::panicking::try::hf1c7b0cddd2a156c
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panicking.rs:490:19
[INFO] [stdout]   39:     0x55c742b0292b - std::panic::catch_unwind::hd0800cc038b1a0e3
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x55c742b0292b - std::thread::Builder::spawn_unchecked_::{{closure}}::hbd3f2581a283969b
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   41:     0x55c742b0292b - core::ops::function::FnOnce::call_once{{vtable.shim}}::h05a4474bc37631e7
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55c742dadb05 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha81bceedc5dd4605
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   43:     0x55c742dadb05 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha86fb738f82c9cc8
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   44:     0x55c742dadb05 - std::sys::unix::thread::Thread::new::thread_start::h2c80c44f64da2074
[INFO] [stdout]                                at /rustc/23949593103d03a82c7ebc2e84434ce6c6edc561/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f858bc70b43 - <unknown>
[INFO] [stdout]   46:     0x7f858bd01bb4 - __clone
[INFO] [stdout]   47:                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 0.09s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "29afb150ab009b493f07910b617f16c77787873d6ead7b8d5b10dd4783dcbd1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29afb150ab009b493f07910b617f16c77787873d6ead7b8d5b10dd4783dcbd1c", kill_on_drop: false }`
[INFO] [stdout] 29afb150ab009b493f07910b617f16c77787873d6ead7b8d5b10dd4783dcbd1c