[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-muxiangqiu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-muxiangqiu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5f8eb358953d889dcd8ddca77b7b192e47f1a2e
[INFO] testing LearningOS/learn_rust_rustlings-muxiangqiu against 1.84.0 for beta-1.85-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-muxiangqiu" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu on toolchain 1.84.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.84.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-muxiangqiu 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" "+1.84.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b08ea3447cdb62cd60da532b84c0adecf526cfb4f26ea8e5464c01c399f24f8
[INFO] running `Command { std: "docker" "start" "-a" "5b08ea3447cdb62cd60da532b84c0adecf526cfb4f26ea8e5464c01c399f24f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b08ea3447cdb62cd60da532b84c0adecf526cfb4f26ea8e5464c01c399f24f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b08ea3447cdb62cd60da532b84c0adecf526cfb4f26ea8e5464c01c399f24f8", kill_on_drop: false }`
[INFO] [stdout] 5b08ea3447cdb62cd60da532b84c0adecf526cfb4f26ea8e5464c01c399f24f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bd498ac38f4ff251408aaa59578febe0a751f3aeca133c60d849d3be9ee9717
[INFO] running `Command { std: "docker" "start" "-a" "7bd498ac38f4ff251408aaa59578febe0a751f3aeca133c60d849d3be9ee9717", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]    Compiling bitflags v1.3.2
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[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling lazycell v1.3.0
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[INFO] [stderr]    Compiling walkdir v2.3.2
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[INFO] [stderr]    Compiling itoa v1.0.2
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[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling argh v0.1.5
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.25s
[INFO] running `Command { std: "docker" "inspect" "7bd498ac38f4ff251408aaa59578febe0a751f3aeca133c60d849d3be9ee9717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bd498ac38f4ff251408aaa59578febe0a751f3aeca133c60d849d3be9ee9717", kill_on_drop: false }`
[INFO] [stdout] 7bd498ac38f4ff251408aaa59578febe0a751f3aeca133c60d849d3be9ee9717
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6a8e528eaf8de2922ad8c5e4cdfa24bb99b1fc816f9295fd8dbca294dfeab8e
[INFO] running `Command { std: "docker" "start" "-a" "e6a8e528eaf8de2922ad8c5e4cdfa24bb99b1fc816f9295fd8dbca294dfeab8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling escargot v0.4.0
[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 treeline v0.1.0
[INFO] [stderr]    Compiling predicates-tree v1.0.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[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 v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.23s
[INFO] running `Command { std: "docker" "inspect" "e6a8e528eaf8de2922ad8c5e4cdfa24bb99b1fc816f9295fd8dbca294dfeab8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a8e528eaf8de2922ad8c5e4cdfa24bb99b1fc816f9295fd8dbca294dfeab8e", kill_on_drop: false }`
[INFO] [stdout] e6a8e528eaf8de2922ad8c5e4cdfa24bb99b1fc816f9295fd8dbca294dfeab8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:86ea7c7af713d31e8cfdb68a6d0db50b5cf7cbeecde3d112f9f257f747318d36" "/opt/rustwide/cargo-home/bin/cargo" "+1.84.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6bd8520b2034244d1ce5cd98f3d410ee19acc20f5ec93e303225fc4f41eb7c8d
[INFO] running `Command { std: "docker" "start" "-a" "6bd8520b2034244d1ce5cd98f3d410ee19acc20f5ec93e303225fc4f41eb7c8d", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustlings-ba39dc9c2a0efc86)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-4e8b826ec953c5b4)
[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:269:36:
[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:     0x62ece56bb15a - std::backtrace_rs::backtrace::libunwind::trace::hfe0e1def394da018
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x62ece56bb15a - std::backtrace_rs::backtrace::trace_unsynchronized::h96fbb6d117554616
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x62ece56bb15a - std::sys::backtrace::_print_fmt::he1169c6f8956325b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x62ece56bb15a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha4a311b32f6b4ad8
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x62ece56e0e73 - core::fmt::rt::Argument::fmt::h8ccd2627d2418ed3
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x62ece56e0e73 - core::fmt::write::h1866771663f62b81
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/mod.rs:1189:21
[INFO] [stdout]    6:     0x62ece56b82e3 - std::io::Write::write_fmt::h2df399c9fb8c6039
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/io/mod.rs:1884:15
[INFO] [stdout]    7:     0x62ece56bafa2 - std::sys::backtrace::BacktraceLock::print::hddd3a9918ce29aa7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x62ece56bc5dd - std::panicking::default_hook::{{closure}}::h791f75256b902d7d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x62ece56bc3e7 - std::panicking::default_hook::h82cc572fcb0d8cd7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x62ece554c527 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h47f4385e5c05a6bc
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   11:     0x62ece554c527 - test::test_main::{{closure}}::h592b6187ee9bbe51
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x62ece56bcc88 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h80408f032954f187
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   13:     0x62ece56bcc88 - std::panicking::rust_panic_with_hook::he21644cc2707f2c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x62ece56bca4a - std::panicking::begin_panic_handler::{{closure}}::h42f7c414fed3cad9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x62ece56bb639 - std::sys::backtrace::__rust_end_short_backtrace::ha26cf5766b4e8c65
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x62ece56bc6dc - rust_begin_unwind
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x62ece55011d0 - core::panicking::panic_fmt::h74866b78e934b1c0
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
[INFO] [stdout]   18:     0x62ece5501656 - core::result::unwrap_failed::h899ed7ab2ccb8159
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x62ece5507dca - core::result::Result<T,E>::unwrap::he9cbdd51e5bb40cd
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x62ece5507dca - rustlings::exercise::test::test_clean::h8f7ee4c2d02e7c34
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:269:9
[INFO] [stdout]   21:     0x62ece5507d07 - rustlings::exercise::test::test_clean::{{closure}}::h6230046f734dd5a3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:268:20
[INFO] [stdout]   22:     0x62ece55027c6 - core::ops::function::FnOnce::call_once::hf6c78b611839f0cb
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x62ece55510db - core::ops::function::FnOnce::call_once::h2f54be8ccda9ff77
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x62ece55510db - test::__rust_begin_short_backtrace::h505f4667df5bf10c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x62ece5550a38 - test::run_test_in_process::{{closure}}::h5ed3028e6069c117
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x62ece5550a38 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hbf705be6aea7c287
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x62ece5550a38 - std::panicking::try::do_call::h555223a41631f02b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x62ece5550a38 - std::panicking::try::he81e496d432108c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x62ece5550a38 - std::panic::catch_unwind::hb2ff356e76867b52
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x62ece5550a38 - test::run_test_in_process::h665bcd2e01d69f5b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x62ece5550a38 - test::run_test::{{closure}}::ha58fbc9c79c6786d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x62ece55144da - test::run_test::{{closure}}::h958602d5fcb1d647
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x62ece55144da - std::sys::backtrace::__rust_begin_short_backtrace::h7ca2fb16f64faa0f
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x62ece5517d94 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hebe77fbe87ddae61
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x62ece5517d94 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5e26d6a69f85d1d6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x62ece5517d94 - std::panicking::try::do_call::h9787fac579f00884
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x62ece5517d94 - std::panicking::try::h788012b555fbd7c5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x62ece5517d94 - std::panic::catch_unwind::hd194f26f99a98fb5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x62ece5517d94 - std::thread::Builder::spawn_unchecked_::{{closure}}::h31c0dcba34ed449c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x62ece5517d94 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60302d9c688101a6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x62ece56c0dab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9578f6ea1d4e1c4b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   42:     0x62ece56c0dab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf4a2f438d8019348
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   43:     0x62ece56c0dab - std::sys::pal::unix::thread::Thread::new::thread_start::h14f1eb868ff90fc9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x7e1af4022ac3 - <unknown>
[INFO] [stdout]   45:     0x7e1af40b3a04 - 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:342:38:
[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/./rmetaYO9hsm\"\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:     0x62ece56bb15a - std::backtrace_rs::backtrace::libunwind::trace::hfe0e1def394da018
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x62ece56bb15a - std::backtrace_rs::backtrace::trace_unsynchronized::h96fbb6d117554616
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x62ece56bb15a - std::sys::backtrace::_print_fmt::he1169c6f8956325b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x62ece56bb15a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha4a311b32f6b4ad8
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x62ece56e0e73 - core::fmt::rt::Argument::fmt::h8ccd2627d2418ed3
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x62ece56e0e73 - core::fmt::write::h1866771663f62b81
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/mod.rs:1189:21
[INFO] [stdout]    6:     0x62ece56b82e3 - std::io::Write::write_fmt::h2df399c9fb8c6039
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/io/mod.rs:1884:15
[INFO] [stdout]    7:     0x62ece56bafa2 - std::sys::backtrace::BacktraceLock::print::hddd3a9918ce29aa7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x62ece56bc5dd - std::panicking::default_hook::{{closure}}::h791f75256b902d7d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x62ece56bc3e7 - std::panicking::default_hook::h82cc572fcb0d8cd7
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x62ece554c527 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h47f4385e5c05a6bc
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   11:     0x62ece554c527 - test::test_main::{{closure}}::h592b6187ee9bbe51
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x62ece56bcc88 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h80408f032954f187
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   13:     0x62ece56bcc88 - std::panicking::rust_panic_with_hook::he21644cc2707f2c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x62ece56bca4a - std::panicking::begin_panic_handler::{{closure}}::h42f7c414fed3cad9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x62ece56bb639 - std::sys::backtrace::__rust_end_short_backtrace::ha26cf5766b4e8c65
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x62ece56bc6dc - rust_begin_unwind
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x62ece55011d0 - core::panicking::panic_fmt::h74866b78e934b1c0
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
[INFO] [stdout]   18:     0x62ece5501656 - core::result::unwrap_failed::h899ed7ab2ccb8159
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x62ece5508c2a - core::result::Result<T,E>::unwrap::h4860f58b13caf24a
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x62ece5508c2a - rustlings::exercise::test::test_exercise_with_output::heae31ee8f75ccd33
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:342:19
[INFO] [stdout]   21:     0x62ece5508a37 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::haecf021af686cb22
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercise.rs:335:35
[INFO] [stdout]   22:     0x62ece55026f6 - core::ops::function::FnOnce::call_once::h53416e11a72ef4b6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x62ece55510db - core::ops::function::FnOnce::call_once::h2f54be8ccda9ff77
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x62ece55510db - test::__rust_begin_short_backtrace::h505f4667df5bf10c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x62ece5550a38 - test::run_test_in_process::{{closure}}::h5ed3028e6069c117
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x62ece5550a38 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hbf705be6aea7c287
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x62ece5550a38 - std::panicking::try::do_call::h555223a41631f02b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x62ece5550a38 - std::panicking::try::he81e496d432108c4
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x62ece5550a38 - std::panic::catch_unwind::hb2ff356e76867b52
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x62ece5550a38 - test::run_test_in_process::h665bcd2e01d69f5b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x62ece5550a38 - test::run_test::{{closure}}::ha58fbc9c79c6786d
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x62ece55144da - test::run_test::{{closure}}::h958602d5fcb1d647
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x62ece55144da - std::sys::backtrace::__rust_begin_short_backtrace::h7ca2fb16f64faa0f
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x62ece5517d94 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hebe77fbe87ddae61
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x62ece5517d94 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5e26d6a69f85d1d6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x62ece5517d94 - std::panicking::try::do_call::h9787fac579f00884
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x62ece5517d94 - std::panicking::try::h788012b555fbd7c5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x62ece5517d94 - std::panic::catch_unwind::hd194f26f99a98fb5
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x62ece5517d94 - std::thread::Builder::spawn_unchecked_::{{closure}}::h31c0dcba34ed449c
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x62ece5517d94 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60302d9c688101a6
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x62ece56c0dab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9578f6ea1d4e1c4b
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   42:     0x62ece56c0dab - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf4a2f438d8019348
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   43:     0x62ece56c0dab - std::sys::pal::unix::thread::Thread::new::thread_start::h14f1eb868ff90fc9
[INFO] [stdout]                                at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x7e1af4022ac3 - <unknown>
[INFO] [stdout]   45:     0x7e1af40b3a04 - 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 0.14s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rustlings`
[INFO] running `Command { std: "docker" "inspect" "6bd8520b2034244d1ce5cd98f3d410ee19acc20f5ec93e303225fc4f41eb7c8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bd8520b2034244d1ce5cd98f3d410ee19acc20f5ec93e303225fc4f41eb7c8d", kill_on_drop: false }`
[INFO] [stdout] 6bd8520b2034244d1ce5cd98f3d410ee19acc20f5ec93e303225fc4f41eb7c8d