[INFO] updating cached repository https://github.com/bobbynarvy/rustlings [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 365fea36fc113bf771ac2a6f16e60c919d14bd20 [INFO] testing bobbynarvy/rustlings against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbobbynarvy%2Frustlings" "/workspace/builds/worker-0/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/bobbynarvy/rustlings on toolchain 28742a1146f10a4f09369baad027a464acb7a766 [INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/bobbynarvy/rustlings [INFO] finished tweaking git repo https://github.com/bobbynarvy/rustlings [INFO] tweaked toml for git repo https://github.com/bobbynarvy/rustlings written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/bobbynarvy/rustlings already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Updating crates.io index [INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag. [INFO] the lockfile is outdated, regenerating it [INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 2a1609425adf22b8c46d38d6c1fa96c031caf3cff186cbe4555982718e4c96e8 [INFO] running `"docker" "start" "-a" "2a1609425adf22b8c46d38d6c1fa96c031caf3cff186cbe4555982718e4c96e8"` [INFO] [stderr] Compiling libc v0.2.69 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling proc-macro2 v1.0.10 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling unicode-width v0.1.7 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling syn v1.0.18 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling smallvec v1.4.0 [INFO] [stderr] Compiling regex-syntax v0.6.17 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling serde v1.0.106 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling lazycell v1.2.1 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling vec_map v0.8.1 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling lock_api v0.3.4 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling walkdir v2.3.1 [INFO] [stderr] Compiling num-traits v0.2.11 [INFO] [stderr] Compiling aho-corasick v0.7.10 [INFO] [stderr] Compiling net2 v0.2.33 [INFO] [stderr] Compiling parking_lot_core v0.7.2 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling termios v0.3.2 [INFO] [stderr] Compiling clicolors-control v1.0.1 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling inotify-sys v0.1.3 [INFO] [stderr] Compiling filetime v0.2.9 [INFO] [stderr] Compiling quote v1.0.3 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling inotify v0.7.0 [INFO] [stderr] Compiling parking_lot v0.10.2 [INFO] [stderr] Compiling mio v0.6.21 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling number_prefix v0.2.8 [INFO] [stderr] Compiling notify v4.0.15 [INFO] [stderr] Compiling regex v1.3.7 [INFO] [stderr] Compiling console v0.10.0 [INFO] [stderr] Compiling console v0.7.7 [INFO] [stderr] Compiling indicatif v0.10.3 [INFO] [stderr] Compiling serde_derive v1.0.106 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v2.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 24s [INFO] running `"docker" "inspect" "2a1609425adf22b8c46d38d6c1fa96c031caf3cff186cbe4555982718e4c96e8"` [INFO] running `"docker" "rm" "-f" "2a1609425adf22b8c46d38d6c1fa96c031caf3cff186cbe4555982718e4c96e8"` [INFO] [stdout] 2a1609425adf22b8c46d38d6c1fa96c031caf3cff186cbe4555982718e4c96e8 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 5b3686954ba75370599ebe50b6780b560db769b5bdadf549c2a33bd11ca32cc7 [INFO] running `"docker" "start" "-a" "5b3686954ba75370599ebe50b6780b560db769b5bdadf549c2a33bd11ca32cc7"` [INFO] [stderr] Compiling ryu v1.0.4 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling itoa v0.4.5 [INFO] [stderr] Compiling predicates-core v1.0.0 [INFO] [stderr] Compiling difference v2.0.0 [INFO] [stderr] Compiling treeline v0.1.0 [INFO] [stderr] Compiling normalize-line-endings v0.3.0 [INFO] [stderr] Compiling glob v0.3.0 [INFO] [stderr] Compiling float-cmp v0.6.0 [INFO] [stderr] Compiling predicates-tree v1.0.0 [INFO] [stderr] Compiling predicates v1.0.4 [INFO] [stderr] Compiling serde_json v1.0.51 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v2.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 16.23s [INFO] running `"docker" "inspect" "5b3686954ba75370599ebe50b6780b560db769b5bdadf549c2a33bd11ca32cc7"` [INFO] running `"docker" "rm" "-f" "5b3686954ba75370599ebe50b6780b560db769b5bdadf549c2a33bd11ca32cc7"` [INFO] [stdout] 5b3686954ba75370599ebe50b6780b560db769b5bdadf549c2a33bd11ca32cc7 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 8bee2bcd4aa8939e198bb4437261fb48c415679d946ecab4b2cd0a114ef6c7f1 [INFO] running `"docker" "start" "-a" "8bee2bcd4aa8939e198bb4437261fb48c415679d946ecab4b2cd0a114ef6c7f1"` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.52s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rustlings-99dd91357465f054 [INFO] [stdout] [INFO] [stdout] running 3 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] [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: Other, message: "Read-only file system" }', src/exercise.rs:131:9 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x55d9be906db4 - backtrace::backtrace::libunwind::trace::hbb4ce8c04526962e [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x55d9be906db4 - backtrace::backtrace::trace_unsynchronized::h79251c088e7be038 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x55d9be906db4 - std::sys_common::backtrace::_print_fmt::h6b0ea30a9223acae [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x55d9be906db4 - ::fmt::h4d51ef07ce58e54b [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x55d9be93012c - core::fmt::write::he16b9c1345d8565e [INFO] [stdout] at src/libcore/fmt/mod.rs:1069 [INFO] [stdout] 5: 0x55d9be6d6d55 - std::io::Write::write_fmt::hc31efe493f037457 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/io/mod.rs:1504 [INFO] [stdout] 6: 0x55d9be901321 - std::io::impls::>::write_fmt::hfcb1ff6c5b834381 [INFO] [stdout] at src/libstd/io/impls.rs:156 [INFO] [stdout] 7: 0x55d9be909685 - std::sys_common::backtrace::_print::h9288fa7d9f6629cb [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x55d9be909685 - std::sys_common::backtrace::print::h82e606e62781d8af [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x55d9be909685 - std::panicking::default_hook::{{closure}}::h1fe350ecbf7604e4 [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x55d9be90936b - std::panicking::default_hook::h1b8b42953fdc841d [INFO] [stdout] at src/libstd/panicking.rs:215 [INFO] [stdout] 11: 0x55d9be909ce2 - std::panicking::rust_panic_with_hook::he73826f4bb75a21e [INFO] [stdout] at src/libstd/panicking.rs:511 [INFO] [stdout] 12: 0x55d9be9098cb - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:419 [INFO] [stdout] 13: 0x55d9be92eb51 - core::panicking::panic_fmt::hc8f9a0b2af5fb585 [INFO] [stdout] at src/libcore/panicking.rs:111 [INFO] [stdout] 14: 0x55d9be92e973 - core::option::expect_none_failed::ha34d57526cca3063 [INFO] [stdout] at src/libcore/option.rs:1268 [INFO] [stdout] 15: 0x55d9be6d469b - core::result::Result::unwrap::h5c2c77447e520f25 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libcore/result.rs:1005 [INFO] [stdout] 16: 0x55d9be6d1c14 - rustlings::exercise::test::test_clean::hcdacfbcc8f65c192 [INFO] [stdout] at src/exercise.rs:131 [INFO] [stdout] 17: 0x55d9be6d1bba - rustlings::exercise::test::test_clean::{{closure}}::h80f8086fcccbab23 [INFO] [stdout] at src/exercise.rs:130 [INFO] [stdout] 18: 0x55d9be6d55ee - core::ops::function::FnOnce::call_once::h9004eab7e3dcb071 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libcore/ops/function.rs:232 [INFO] [stdout] 19: 0x55d9be6e2c4f - as core::ops::function::FnOnce>::call_once::he1ba1da20629a2d8 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/liballoc/boxed.rs:1008 [INFO] [stdout] 20: 0x55d9be6fe24e - as core::ops::function::FnOnce<()>>::call_once::hf94927858761de4a [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panic.rs:318 [INFO] [stdout] 21: 0x55d9be6fe24e - std::panicking::try::do_call::h1585003392664d93 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panicking.rs:331 [INFO] [stdout] 22: 0x55d9be6fe24e - std::panicking::try::h43d950f958a74468 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panicking.rs:274 [INFO] [stdout] 23: 0x55d9be6fe24e - std::panic::catch_unwind::hb5284de2977ddeea [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panic.rs:394 [INFO] [stdout] 24: 0x55d9be6fe24e - test::run_test_in_process::had39bb305b26a3ae [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 25: 0x55d9be6fe24e - test::run_test::run_test_inner::{{closure}}::h12b1756b854ada1a [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 26: 0x55d9be6d6206 - std::sys_common::backtrace::__rust_begin_short_backtrace::hec04b80bece92bf9 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 27: 0x55d9be6db525 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::heca431434c1ac418 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/thread/mod.rs:475 [INFO] [stdout] 28: 0x55d9be6db525 - as core::ops::function::FnOnce<()>>::call_once::he2457d582c032747 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panic.rs:318 [INFO] [stdout] 29: 0x55d9be6db525 - std::panicking::try::do_call::hbcd49dc3823e8b28 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panicking.rs:331 [INFO] [stdout] 30: 0x55d9be6db525 - std::panicking::try::h1ba95c07dd8d422b [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panicking.rs:274 [INFO] [stdout] 31: 0x55d9be6db525 - std::panic::catch_unwind::h95854794ba9eee4c [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/panic.rs:394 [INFO] [stdout] 32: 0x55d9be6db525 - std::thread::Builder::spawn_unchecked::{{closure}}::h4e297b8574092d6e [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/thread/mod.rs:474 [INFO] [stdout] 33: 0x55d9be6db525 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h1b855aad7f5ac67e [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libcore/ops/function.rs:232 [INFO] [stdout] 34: 0x55d9be8fd52f - as core::ops::function::FnOnce>::call_once::h48069b269ca48108 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/liballoc/boxed.rs:1008 [INFO] [stdout] 35: 0x55d9be910603 - as core::ops::function::FnOnce>::call_once::heff660b32cd3afd8 [INFO] [stdout] at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/liballoc/boxed.rs:1008 [INFO] [stdout] 36: 0x55d9be910603 - std::sys::unix::thread::Thread::new::thread_start::ha538939ed1e2e958 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 37: 0x7f5e2ea416db - start_thread [INFO] [stdout] 38: 0x7f5e2ef7e88f - __clone [INFO] [stdout] 39: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] exercise::test::test_clean [INFO] [stdout] [INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--bin rustlings' [INFO] running `"docker" "inspect" "8bee2bcd4aa8939e198bb4437261fb48c415679d946ecab4b2cd0a114ef6c7f1"` [INFO] running `"docker" "rm" "-f" "8bee2bcd4aa8939e198bb4437261fb48c415679d946ecab4b2cd0a114ef6c7f1"` [INFO] [stdout] 8bee2bcd4aa8939e198bb4437261fb48c415679d946ecab4b2cd0a114ef6c7f1