[INFO] updating cached repository https://github.com/Unaidedsteak/rustlings-solutions [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] 7723ebac2e7d4cdc5500ee4d74bed410b3c42659 [INFO] testing Unaidedsteak/rustlings-solutions against 1.44.0 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnaidedsteak%2Frustlings-solutions" "/workspace/builds/worker-9/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'... [INFO] [stderr] done. [INFO] [stderr] Checking out files: 38% (520/1367) Checking out files: 39% (534/1367) Checking out files: 40% (547/1367) Checking out files: 41% (561/1367) Checking out files: 42% (575/1367) Checking out files: 43% (588/1367) Checking out files: 44% (602/1367) Checking out files: 45% (616/1367) Checking out files: 46% (629/1367) Checking out files: 47% (643/1367) Checking out files: 48% (657/1367) Checking out files: 49% (670/1367) Checking out files: 50% (684/1367) Checking out files: 51% (698/1367) Checking out files: 52% (711/1367) Checking out files: 53% (725/1367) Checking out files: 54% (739/1367) Checking out files: 55% (752/1367) Checking out files: 56% (766/1367) Checking out files: 57% (780/1367) Checking out files: 58% (793/1367) Checking out files: 59% (807/1367) Checking out files: 60% (821/1367) Checking out files: 61% (834/1367) Checking out files: 62% (848/1367) Checking out files: 63% (862/1367) Checking out files: 64% (875/1367) Checking out files: 65% (889/1367) Checking out files: 66% (903/1367) Checking out files: 67% (916/1367) Checking out files: 68% (930/1367) Checking out files: 69% (944/1367) Checking out files: 70% (957/1367) Checking out files: 71% (971/1367) Checking out files: 72% (985/1367) Checking out files: 73% (998/1367) Checking out files: 74% (1012/1367) Checking out files: 75% (1026/1367) Checking out files: 76% (1039/1367) Checking out files: 77% (1053/1367) Checking out files: 78% (1067/1367) Checking out files: 79% (1080/1367) Checking out files: 80% (1094/1367) Checking out files: 81% (1108/1367) Checking out files: 82% (1121/1367) Checking out files: 83% (1135/1367) Checking out files: 84% (1149/1367) Checking out files: 85% (1162/1367) Checking out files: 86% (1176/1367) Checking out files: 87% (1190/1367) Checking out files: 88% (1203/1367) Checking out files: 88% (1205/1367) Checking out files: 89% (1217/1367) Checking out files: 90% (1231/1367) Checking out files: 91% (1244/1367) Checking out files: 92% (1258/1367) Checking out files: 93% (1272/1367) Checking out files: 94% (1285/1367) Checking out files: 95% (1299/1367) Checking out files: 96% (1313/1367) Checking out files: 97% (1326/1367) Checking out files: 98% (1340/1367) Checking out files: 99% (1354/1367) Checking out files: 100% (1367/1367) Checking out files: 100% (1367/1367), done. [INFO] validating manifest of git repo https://github.com/Unaidedsteak/rustlings-solutions on toolchain 1.44.0 [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/Unaidedsteak/rustlings-solutions [INFO] finished tweaking git repo https://github.com/Unaidedsteak/rustlings-solutions [INFO] tweaked toml for git repo https://github.com/Unaidedsteak/rustlings-solutions written to /workspace/builds/worker-9/source/Cargo.toml [INFO] crate git repo https://github.com/Unaidedsteak/rustlings-solutions already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "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] c09de73752ce37ea14f49fb33d62ba7f6457f554cc71601fccb876917f8a2d90 [INFO] running `"docker" "start" "-a" "c09de73752ce37ea14f49fb33d62ba7f6457f554cc71601fccb876917f8a2d90"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling rand_core v0.4.0 [INFO] [stderr] Compiling autocfg v0.1.4 [INFO] [stderr] Compiling cfg-if v0.1.9 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Compiling log v0.4.6 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling atty v0.2.11 [INFO] [stderr] Compiling termios v0.3.1 [INFO] [stderr] Compiling net2 v0.2.33 [INFO] [stderr] Compiling iovec v0.1.2 [INFO] [stderr] Compiling inotify-sys v0.1.3 [INFO] [stderr] Compiling clicolors-control v1.0.0 [INFO] [stderr] Compiling clicolors-control v0.2.0 [INFO] [stderr] Compiling filetime v0.2.5 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling inotify v0.6.1 [INFO] [stderr] Compiling mio v0.6.19 [INFO] [stderr] Compiling mio-extras v2.0.5 [INFO] [stderr] Compiling notify v4.0.12 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Compiling console v0.7.5 [INFO] [stderr] Compiling console v0.6.2 [INFO] [stderr] Compiling indicatif v0.9.0 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v1.4.1 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 45.95s [INFO] running `"docker" "inspect" "c09de73752ce37ea14f49fb33d62ba7f6457f554cc71601fccb876917f8a2d90"` [INFO] running `"docker" "rm" "-f" "c09de73752ce37ea14f49fb33d62ba7f6457f554cc71601fccb876917f8a2d90"` [INFO] [stdout] c09de73752ce37ea14f49fb33d62ba7f6457f554cc71601fccb876917f8a2d90 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"` [INFO] [stdout] 6d91ee3eb5f8d4f50f7828d21a68252e2c11678a137d3a938cf35b0efe8ceda1 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "6d91ee3eb5f8d4f50f7828d21a68252e2c11678a137d3a938cf35b0efe8ceda1"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Compiling predicates-core v1.0.0 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Compiling treeline v0.1.0 [INFO] [stderr] Compiling difference v2.0.0 [INFO] [stderr] Compiling predicates v1.0.1 [INFO] [stderr] Compiling predicates-tree v1.0.0 [INFO] [stderr] Compiling serde_json v1.0.39 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v1.4.1 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 15.94s [INFO] running `"docker" "inspect" "6d91ee3eb5f8d4f50f7828d21a68252e2c11678a137d3a938cf35b0efe8ceda1"` [INFO] running `"docker" "rm" "-f" "6d91ee3eb5f8d4f50f7828d21a68252e2c11678a137d3a938cf35b0efe8ceda1"` [INFO] [stdout] 6d91ee3eb5f8d4f50f7828d21a68252e2c11678a137d3a938cf35b0efe8ceda1 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "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] b420e8d1544dec1f8dc5c3c7af45b8d6a21b2f42d3258338060224452f2c972a [INFO] running `"docker" "start" "-a" "b420e8d1544dec1f8dc5c3c7af45b8d6a21b2f42d3258338060224452f2c972a"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.29s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rustlings-912c1d2b8a64d7cb [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test exercise::test::test_clean ... FAILED [INFO] [stderr] error: test failed, to rerun pass '--bin rustlings' [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:71:9 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x5556ff026674 - backtrace::backtrace::libunwind::trace::hc1c4a1d8ad423b97 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x5556ff026674 - backtrace::backtrace::trace_unsynchronized::h82274781060cb056 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x5556ff026674 - std::sys_common::backtrace::_print_fmt::h2a45d89b653a4da8 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x5556ff026674 - ::fmt::h41a0a93ab85e6aa1 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x5556ff04f3cc - core::fmt::write::hdaea18585065a96d [INFO] [stdout] at src/libcore/fmt/mod.rs:1069 [INFO] [stdout] 5: 0x5556fefd7085 - std::io::Write::write_fmt::h42f0550b6bd39c6e [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/io/mod.rs:1504 [INFO] [stdout] 6: 0x5556ff020bb1 - std::io::impls::>::write_fmt::h223d7b7033cad46d [INFO] [stdout] at src/libstd/io/impls.rs:156 [INFO] [stdout] 7: 0x5556ff028f45 - std::sys_common::backtrace::_print::hd95f9978cc145ca4 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x5556ff028f45 - std::sys_common::backtrace::print::hfb25ca2291be47d0 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x5556ff028f45 - std::panicking::default_hook::{{closure}}::h44f76cee5dc8591c [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x5556ff028c2b - std::panicking::default_hook::h198e1a712910f1e6 [INFO] [stdout] at src/libstd/panicking.rs:215 [INFO] [stdout] 11: 0x5556ff0295a2 - std::panicking::rust_panic_with_hook::hc0b4730bb8013f9d [INFO] [stdout] at src/libstd/panicking.rs:511 [INFO] [stdout] 12: 0x5556ff02918b - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:419 [INFO] [stdout] 13: 0x5556ff04ddf1 - core::panicking::panic_fmt::h1ac71ad045d55416 [INFO] [stdout] at src/libcore/panicking.rs:111 [INFO] [stdout] 14: 0x5556ff04dc13 - core::option::expect_none_failed::hb40004d71d61b685 [INFO] [stdout] at src/libcore/option.rs:1268 [INFO] [stdout] 15: 0x5556fefd5e9b - core::result::Result::unwrap::ha84b023280c6050a [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/result.rs:1005 [INFO] [stdout] 16: 0x5556fefd5a74 - rustlings::exercise::test::test_clean::h14e223c6cecf1ce9 [INFO] [stdout] at src/exercise.rs:71 [INFO] [stdout] 17: 0x5556fefd5a1a - rustlings::exercise::test::test_clean::{{closure}}::he1b1dffe935082cb [INFO] [stdout] at src/exercise.rs:70 [INFO] [stdout] 18: 0x5556fefd5c9e - core::ops::function::FnOnce::call_once::h33df9ccd1f05e8ad [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232 [INFO] [stdout] 19: 0x5556feffe516 - as core::ops::function::FnOnce>::call_once::hc165f65f4331a55c [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 20: 0x5556feffe516 - as core::ops::function::FnOnce<()>>::call_once::hb89f1f769cad07ce [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318 [INFO] [stdout] 21: 0x5556feffe516 - std::panicking::try::do_call::h104f7f3dae5a1b29 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331 [INFO] [stdout] 22: 0x5556feffe516 - std::panicking::try::h0e20f01361cba753 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274 [INFO] [stdout] 23: 0x5556feffe516 - std::panic::catch_unwind::h0bd0c84b5f4cd121 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394 [INFO] [stdout] 24: 0x5556feffe516 - test::run_test_in_process::hf34c22adfeb6853d [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 25: 0x5556feffe516 - test::run_test::run_test_inner::{{closure}}::h40d568b4c10a12f1 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 26: 0x5556fefd6536 - std::sys_common::backtrace::__rust_begin_short_backtrace::hffd9774ad3f2d778 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 27: 0x5556fefdb8c5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h4594020476cf52d4 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:475 [INFO] [stdout] 28: 0x5556fefdb8c5 - as core::ops::function::FnOnce<()>>::call_once::h9d0a6d45b73e29e4 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318 [INFO] [stdout] 29: 0x5556fefdb8c5 - std::panicking::try::do_call::h902fd77b30bb3bb7 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331 [INFO] [stdout] 30: 0x5556fefdb8c5 - std::panicking::try::hc17d3a628e65d49d [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274 [INFO] [stdout] 31: 0x5556fefdb8c5 - std::panic::catch_unwind::h9c9d49cbb6b18017 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394 [INFO] [stdout] 32: 0x5556fefdb8c5 - std::thread::Builder::spawn_unchecked::{{closure}}::h6a6f5a333fd631a2 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:474 [INFO] [stdout] 33: 0x5556fefdb8c5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha6fb197e0ce57f73 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232 [INFO] [stdout] 34: 0x5556ff02fe9a - as core::ops::function::FnOnce>::call_once::h1f1fac7de7dd9691 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 35: 0x5556ff02fe9a - as core::ops::function::FnOnce>::call_once::ha031f48633a6af54 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 36: 0x5556ff02fe9a - std::sys::unix::thread::Thread::new::thread_start::h241864caf436e182 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 37: 0x7f4899c67609 - start_thread [INFO] [stdout] 38: 0x7f4899da9103 - __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. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "b420e8d1544dec1f8dc5c3c7af45b8d6a21b2f42d3258338060224452f2c972a"` [INFO] running `"docker" "rm" "-f" "b420e8d1544dec1f8dc5c3c7af45b8d6a21b2f42d3258338060224452f2c972a"` [INFO] [stdout] b420e8d1544dec1f8dc5c3c7af45b8d6a21b2f42d3258338060224452f2c972a