[INFO] cloning repository https://github.com/devonartis/rustlings_answer [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/devonartis/rustlings_answer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevonartis%2Frustlings_answer", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevonartis%2Frustlings_answer'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2c86f695a8d0a0a2a440ac2bc9166cbf0e179b22 [INFO] testing devonartis/rustlings_answer against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevonartis%2Frustlings_answer" "/workspace/builds/worker-1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/devonartis/rustlings_answer on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/devonartis/rustlings_answer [INFO] finished tweaking git repo https://github.com/devonartis/rustlings_answer [INFO] tweaked toml for git repo https://github.com/devonartis/rustlings_answer written to /workspace/builds/worker-1/source/Cargo.toml [INFO] crate git repo https://github.com/devonartis/rustlings_answer already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 923d0e06188c1cd0c5f990f1e79f44c0615420bcd5a23205824f815c0cb861eb [INFO] running `Command { std: "docker" "start" "-a" "923d0e06188c1cd0c5f990f1e79f44c0615420bcd5a23205824f815c0cb861eb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "923d0e06188c1cd0c5f990f1e79f44c0615420bcd5a23205824f815c0cb861eb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "923d0e06188c1cd0c5f990f1e79f44c0615420bcd5a23205824f815c0cb861eb", kill_on_drop: false }` [INFO] [stdout] 923d0e06188c1cd0c5f990f1e79f44c0615420bcd5a23205824f815c0cb861eb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 7dcf3e5befc95d9712976ed624bdec8e7f0f23c39df542fa748afd6d04532820 [INFO] running `Command { std: "docker" "start" "-a" "7dcf3e5befc95d9712976ed624bdec8e7f0f23c39df542fa748afd6d04532820", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.100 [INFO] [stderr] Compiling cfg-if v1.0.0 [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 autocfg v1.0.1 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling smallvec v1.6.1 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling regex-syntax v0.6.25 [INFO] [stderr] Compiling serde_derive v1.0.129 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling serde v1.0.129 [INFO] [stderr] Compiling unicode-segmentation v1.8.0 [INFO] [stderr] Compiling instant v0.1.10 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling lock_api v0.4.4 [INFO] [stderr] Compiling slab v0.4.4 [INFO] [stderr] Compiling argh_shared v0.1.5 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling lazycell v1.3.0 [INFO] [stderr] Compiling bitflags v1.3.2 [INFO] [stderr] Compiling walkdir v2.3.2 [INFO] [stderr] Compiling heck v0.3.3 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling aho-corasick v0.7.18 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling net2 v0.2.37 [INFO] [stderr] Compiling parking_lot_core v0.8.3 [INFO] [stderr] Compiling terminal_size v0.1.17 [INFO] [stderr] Compiling inotify-sys v0.1.5 [INFO] [stderr] Compiling filetime v0.2.15 [INFO] [stderr] Compiling clicolors-control v1.0.1 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling termios v0.3.3 [INFO] [stderr] Compiling inotify v0.7.1 [INFO] [stderr] Compiling parking_lot v0.11.1 [INFO] [stderr] Compiling mio v0.6.23 [INFO] [stderr] Compiling number_prefix v0.2.8 [INFO] [stderr] Compiling regex v1.5.4 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling notify v4.0.17 [INFO] [stderr] Compiling console v0.14.1 [INFO] [stderr] Compiling console v0.7.7 [INFO] [stderr] Compiling indicatif v0.10.3 [INFO] [stderr] Compiling argh_derive v0.1.5 [INFO] [stderr] Compiling argh v0.1.5 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v4.6.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 15.75s [INFO] running `Command { std: "docker" "inspect" "7dcf3e5befc95d9712976ed624bdec8e7f0f23c39df542fa748afd6d04532820", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7dcf3e5befc95d9712976ed624bdec8e7f0f23c39df542fa748afd6d04532820", kill_on_drop: false }` [INFO] [stdout] 7dcf3e5befc95d9712976ed624bdec8e7f0f23c39df542fa748afd6d04532820 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] bfda8370a6a3b2788ada866765a2758f1ebfe63bfd06fad11de35c66de315bbe [INFO] running `Command { std: "docker" "start" "-a" "bfda8370a6a3b2788ada866765a2758f1ebfe63bfd06fad11de35c66de315bbe", kill_on_drop: false }` [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling serde_json v1.0.66 [INFO] [stderr] Compiling itoa v0.4.8 [INFO] [stderr] Compiling predicates-core v1.0.2 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling float-cmp v0.8.0 [INFO] [stderr] Compiling treeline v0.1.0 [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 predicates-tree v1.0.3 [INFO] [stderr] Compiling predicates v1.0.8 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v4.6.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 4.56s [INFO] running `Command { std: "docker" "inspect" "bfda8370a6a3b2788ada866765a2758f1ebfe63bfd06fad11de35c66de315bbe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bfda8370a6a3b2788ada866765a2758f1ebfe63bfd06fad11de35c66de315bbe", kill_on_drop: false }` [INFO] [stdout] bfda8370a6a3b2788ada866765a2758f1ebfe63bfd06fad11de35c66de315bbe [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--target" "i686-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] b16e92b72c8e6082d5a9f9f8848bff9ed60999f3c5e9180cb3af59f68536abac [INFO] running `Command { std: "docker" "start" "-a" "b16e92b72c8e6082d5a9f9f8848bff9ed60999f3c5e9180cb3af59f68536abac", kill_on_drop: false }` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.04s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/rustlings-67094726a217b9b9) [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: 0x81ee201 - std::backtrace_rs::backtrace::libunwind::trace::h5f291319ef5c6762 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stdout] 1: 0x81ee201 - std::backtrace_rs::backtrace::trace_unsynchronized::h96ca96ef06a343d3 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x81ee201 - std::sys_common::backtrace::_print_fmt::h9ecddad7ef420251 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:65:5 [INFO] [stdout] 3: 0x81ee201 - ::fmt::h7345cc970529ac34 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:44:22 [INFO] [stdout] 4: 0x822a9dc - core::fmt::write::hf580cd49f879cb74 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/fmt/mod.rs:1208:17 [INFO] [stdout] 5: 0x81eb26b - std::io::Write::write_fmt::hceb49ab886ea57c9 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/io/mod.rs:1682:15 [INFO] [stdout] 6: 0x81ee006 - std::sys_common::backtrace::_print::h8b6713f1e30cd3b1 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:47:5 [INFO] [stdout] 7: 0x81ee006 - std::sys_common::backtrace::print::h228371403e861751 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:34:9 [INFO] [stdout] 8: 0x81efbe5 - std::panicking::default_hook::{{closure}}::h6da55f6f475e59d6 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:267:22 [INFO] [stdout] 9: 0x81ef8e5 - std::panicking::default_hook::h8f14cf6f2f2f52d8 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:283:9 [INFO] [stdout] 10: 0x81cd0ac - core::ops::function::Fn::call::h9b26c25f04212ebd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:161:5 [INFO] [stdout] 11: 0x808bfd9 - as core::ops::function::Fn>::call::h0b6006386399b354 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2032:9 [INFO] [stdout] 12: 0x808bfd9 - test::test_main::{{closure}}::hf462dccab4831d1f [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:135:21 [INFO] [stdout] 13: 0x81f0324 - as core::ops::function::Fn>::call::h9163b46de7e7a7ba [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2032:9 [INFO] [stdout] 14: 0x81f0324 - std::panicking::rust_panic_with_hook::h2f79ffe424d88114 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:692:13 [INFO] [stdout] 15: 0x81f00dc - std::panicking::begin_panic_handler::{{closure}}::h59ef6a1246219cbe [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:579:13 [INFO] [stdout] 16: 0x81ee67a - std::sys_common::backtrace::__rust_end_short_backtrace::h3d3587da31656282 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:137:18 [INFO] [stdout] 17: 0x81efdb3 - rust_begin_unwind [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:575:5 [INFO] [stdout] 18: 0x804c730 - core::panicking::panic_fmt::h40e949315ccf1c11 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panicking.rs:64:14 [INFO] [stdout] 19: 0x804cb6d - core::result::unwrap_failed::hfad931015b9eef7f [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/result.rs:1791:5 [INFO] [stdout] 20: 0x805a72d - core::result::Result::unwrap::he123e55748ebf7ce [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/result.rs:1113:23 [INFO] [stdout] 21: 0x804fcc7 - rustlings::exercise::test::test_clean::hde4f6abec3f35fc5 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:270:9 [INFO] [stdout] 22: 0x804fc07 - rustlings::exercise::test::test_clean::{{closure}}::he9430826b706c266 [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:269:21 [INFO] [stdout] 23: 0x805924d - core::ops::function::FnOnce::call_once::hea1dd7683517970c [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 24: 0x8090a1e - core::ops::function::FnOnce::call_once::hecc3c5fab6cb88cd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 25: 0x8090a1e - test::__rust_begin_short_backtrace::h18e977d49f646cd0 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:657:18 [INFO] [stdout] 26: 0x80639c0 - test::run_test::{{closure}}::ha39325b57d1cb768 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:648:30 [INFO] [stdout] 27: 0x80639c0 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h5040e45b1e845123 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 28: 0x808fb97 - as core::ops::function::FnOnce>::call_once::h26c70f40318b0360 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 29: 0x808fb97 - as core::ops::function::FnOnce<()>>::call_once::hfa679c02d5269ea1 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 30: 0x808fb97 - std::panicking::try::do_call::h5bc1d3d4ab3d7acd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:483:40 [INFO] [stdout] 31: 0x808fb97 - std::panicking::try::h0d0734d848512873 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:447:19 [INFO] [stdout] 32: 0x808fb97 - std::panic::catch_unwind::h1b17ff745af6bff3 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panic.rs:137:14 [INFO] [stdout] 33: 0x808fb97 - test::run_test_in_process::h7545f915ef03cbbe [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:680:27 [INFO] [stdout] 34: 0x808fb97 - test::run_test::run_test_inner::{{closure}}::he5f64ab41218f776 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:574:39 [INFO] [stdout] 35: 0x805e22a - test::run_test::run_test_inner::{{closure}}::h74ad460a34a68702 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:601:37 [INFO] [stdout] 36: 0x805e22a - std::sys_common::backtrace::__rust_begin_short_backtrace::h3e8f4d074e786dcf [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:121:18 [INFO] [stdout] 37: 0x806383b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h9aa166e39b65b836 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/thread/mod.rs:550:17 [INFO] [stdout] 38: 0x806383b - as core::ops::function::FnOnce<()>>::call_once::h49c1c6ee61f36b13 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 39: 0x806383b - std::panicking::try::do_call::h6c0758e2b02f2859 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:483:40 [INFO] [stdout] 40: 0x806383b - std::panicking::try::h3684f436e633cc77 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:447:19 [INFO] [stdout] 41: 0x806383b - std::panic::catch_unwind::hc37306cbaab1bf43 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panic.rs:137:14 [INFO] [stdout] 42: 0x806383b - std::thread::Builder::spawn_unchecked_::{{closure}}::h6a4963ec3f0e3be6 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/thread/mod.rs:549:30 [INFO] [stdout] 43: 0x806383b - core::ops::function::FnOnce::call_once{{vtable.shim}}::h0914fb32932929dc [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 44: 0x81f40dd - as core::ops::function::FnOnce>::call_once::hb6157d95beb62c18 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 45: 0x81f40dd - as core::ops::function::FnOnce>::call_once::h710bd3383b288449 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 46: 0x81f40dd - std::sys::unix::thread::Thread::new::thread_start::ha4036db4cbfe1239 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys/unix/thread.rs:108:17 [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: couldn't create a temp dir: Read-only file system (os error 30) at path \"/opt/rustwide/workdir/./rmetaSqqBWw\"\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: 0x81ee201 - std::backtrace_rs::backtrace::libunwind::trace::h5f291319ef5c6762 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stdout] 1: 0x81ee201 - std::backtrace_rs::backtrace::trace_unsynchronized::h96ca96ef06a343d3 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x81ee201 - std::sys_common::backtrace::_print_fmt::h9ecddad7ef420251 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:65:5 [INFO] [stdout] 3: 0x81ee201 - ::fmt::h7345cc970529ac34 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:44:22 [INFO] [stdout] 4: 0x822a9dc - core::fmt::write::hf580cd49f879cb74 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/fmt/mod.rs:1208:17 [INFO] [stdout] 5: 0x81eb26b - std::io::Write::write_fmt::hceb49ab886ea57c9 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/io/mod.rs:1682:15 [INFO] [stdout] 6: 0x81ee006 - std::sys_common::backtrace::_print::h8b6713f1e30cd3b1 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:47:5 [INFO] [stdout] 7: 0x81ee006 - std::sys_common::backtrace::print::h228371403e861751 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:34:9 [INFO] [stdout] 8: 0x81efbe5 - std::panicking::default_hook::{{closure}}::h6da55f6f475e59d6 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:267:22 [INFO] [stdout] 9: 0x81ef8e5 - std::panicking::default_hook::h8f14cf6f2f2f52d8 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:283:9 [INFO] [stdout] 10: 0x81cd0ac - core::ops::function::Fn::call::h9b26c25f04212ebd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:161:5 [INFO] [stdout] 11: 0x808bfd9 - as core::ops::function::Fn>::call::h0b6006386399b354 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2032:9 [INFO] [stdout] 12: 0x808bfd9 - test::test_main::{{closure}}::hf462dccab4831d1f [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:135:21 [INFO] [stdout] 13: 0x81f0324 - as core::ops::function::Fn>::call::h9163b46de7e7a7ba [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2032:9 [INFO] [stdout] 14: 0x81f0324 - std::panicking::rust_panic_with_hook::h2f79ffe424d88114 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:692:13 [INFO] [stdout] 15: 0x81f00dc - std::panicking::begin_panic_handler::{{closure}}::h59ef6a1246219cbe [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:579:13 [INFO] [stdout] 16: 0x81ee67a - std::sys_common::backtrace::__rust_end_short_backtrace::h3d3587da31656282 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:137:18 [INFO] [stdout] 17: 0x81efdb3 - rust_begin_unwind [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:575:5 [INFO] [stdout] 18: 0x804c730 - core::panicking::panic_fmt::h40e949315ccf1c11 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panicking.rs:64:14 [INFO] [stdout] 19: 0x804cb6d - core::result::unwrap_failed::hfad931015b9eef7f [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/result.rs:1791:5 [INFO] [stdout] 20: 0x805a673 - core::result::Result::unwrap::h6ef2fe2bb94b4e0b [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/result.rs:1113:23 [INFO] [stdout] 21: 0x8050a5b - rustlings::exercise::test::test_exercise_with_output::h9da5d88aa4fed3ab [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:343:19 [INFO] [stdout] 22: 0x80508a7 - rustlings::exercise::test::test_exercise_with_output::{{closure}}::h846af056fc2f6e9b [INFO] [stdout] at /opt/rustwide/workdir/src/exercise.rs:336:36 [INFO] [stdout] 23: 0x805911d - core::ops::function::FnOnce::call_once::h1e7b6e345220be1e [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 24: 0x8090a1e - core::ops::function::FnOnce::call_once::hecc3c5fab6cb88cd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 25: 0x8090a1e - test::__rust_begin_short_backtrace::h18e977d49f646cd0 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:657:18 [INFO] [stdout] 26: 0x80639c0 - test::run_test::{{closure}}::ha39325b57d1cb768 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:648:30 [INFO] [stdout] 27: 0x80639c0 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h5040e45b1e845123 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 28: 0x808fb97 - as core::ops::function::FnOnce>::call_once::h26c70f40318b0360 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 29: 0x808fb97 - as core::ops::function::FnOnce<()>>::call_once::hfa679c02d5269ea1 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 30: 0x808fb97 - std::panicking::try::do_call::h5bc1d3d4ab3d7acd [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:483:40 [INFO] [stdout] 31: 0x808fb97 - std::panicking::try::h0d0734d848512873 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:447:19 [INFO] [stdout] 32: 0x808fb97 - std::panic::catch_unwind::h1b17ff745af6bff3 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panic.rs:137:14 [INFO] [stdout] 33: 0x808fb97 - test::run_test_in_process::h7545f915ef03cbbe [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:680:27 [INFO] [stdout] 34: 0x808fb97 - test::run_test::run_test_inner::{{closure}}::he5f64ab41218f776 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:574:39 [INFO] [stdout] 35: 0x805e22a - test::run_test::run_test_inner::{{closure}}::h74ad460a34a68702 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/test/src/lib.rs:601:37 [INFO] [stdout] 36: 0x805e22a - std::sys_common::backtrace::__rust_begin_short_backtrace::h3e8f4d074e786dcf [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys_common/backtrace.rs:121:18 [INFO] [stdout] 37: 0x806383b - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h9aa166e39b65b836 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/thread/mod.rs:550:17 [INFO] [stdout] 38: 0x806383b - as core::ops::function::FnOnce<()>>::call_once::h49c1c6ee61f36b13 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 39: 0x806383b - std::panicking::try::do_call::h6c0758e2b02f2859 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:483:40 [INFO] [stdout] 40: 0x806383b - std::panicking::try::h3684f436e633cc77 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panicking.rs:447:19 [INFO] [stdout] 41: 0x806383b - std::panic::catch_unwind::hc37306cbaab1bf43 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/panic.rs:137:14 [INFO] [stdout] 42: 0x806383b - std::thread::Builder::spawn_unchecked_::{{closure}}::h6a4963ec3f0e3be6 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/thread/mod.rs:549:30 [INFO] [stdout] 43: 0x806383b - core::ops::function::FnOnce::call_once{{vtable.shim}}::h0914fb32932929dc [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/core/src/ops/function.rs:507:5 [INFO] [stdout] 44: 0x81f40dd - as core::ops::function::FnOnce>::call_once::hb6157d95beb62c18 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 45: 0x81f40dd - as core::ops::function::FnOnce>::call_once::h710bd3383b288449 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/alloc/src/boxed.rs:2000:9 [INFO] [stdout] 46: 0x81f40dd - std::sys::unix::thread::Thread::new::thread_start::ha4036db4cbfe1239 [INFO] [stdout] at /rustc/fc4ba03ef77ca5018fb78a097d3b924d30f15bfc/library/std/src/sys/unix/thread.rs:108:17 [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 0.06s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass `--bin rustlings` [INFO] running `Command { std: "docker" "inspect" "b16e92b72c8e6082d5a9f9f8848bff9ed60999f3c5e9180cb3af59f68536abac", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b16e92b72c8e6082d5a9f9f8848bff9ed60999f3c5e9180cb3af59f68536abac", kill_on_drop: false }` [INFO] [stdout] b16e92b72c8e6082d5a9f9f8848bff9ed60999f3c5e9180cb3af59f68536abac