[INFO] cloning repository https://github.com/vibhoothiiaanand/rustlings [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vibhoothiiaanand/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvibhoothiiaanand%2Frustlings"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvibhoothiiaanand%2Frustlings'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 3841e974d8f178c959015990f8dc00acffe40611 [INFO] testing vibhoothiiaanand/rustlings against beta-2020-06-03 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvibhoothiiaanand%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/vibhoothiiaanand/rustlings on toolchain beta-2020-06-03 [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/vibhoothiiaanand/rustlings [INFO] finished tweaking git repo https://github.com/vibhoothiiaanand/rustlings [INFO] tweaked toml for git repo https://github.com/vibhoothiiaanand/rustlings written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/vibhoothiiaanand/rustlings already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [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 [INFO] the lockfile is outdated, regenerating it [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "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=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" "+beta-2020-06-03" "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] da7428d62478bab9a858e8ff68755a64e094f708b82e734d653601b2ca7daf59 [INFO] running `"docker" "start" "-a" "da7428d62478bab9a858e8ff68755a64e094f708b82e734d653601b2ca7daf59"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling libc v0.2.71 [INFO] [stderr] Compiling proc-macro2 v1.0.18 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling syn v1.0.30 [INFO] [stderr] Compiling unicode-width v0.1.7 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling smallvec v1.4.0 [INFO] [stderr] Compiling regex-syntax v0.6.18 [INFO] [stderr] Compiling serde v1.0.111 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling lazycell v1.2.1 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling vec_map v0.8.2 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling lock_api v0.3.4 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling thread_local v1.0.1 [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 quote v1.0.7 [INFO] [stderr] Compiling net2 v0.2.34 [INFO] [stderr] Compiling termios v0.3.2 [INFO] [stderr] Compiling parking_lot_core v0.7.2 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling inotify-sys v0.1.3 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling terminal_size v0.1.12 [INFO] [stderr] Compiling filetime v0.2.10 [INFO] [stderr] Compiling clicolors-control v1.0.1 [INFO] [stderr] Compiling clap v2.33.1 [INFO] [stderr] Compiling inotify v0.7.1 [INFO] [stderr] Compiling parking_lot v0.10.2 [INFO] [stderr] Compiling mio v0.6.22 [INFO] [stderr] Compiling number_prefix v0.2.8 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling notify v4.0.15 [INFO] [stderr] Compiling regex v1.3.9 [INFO] [stderr] Compiling console v0.11.3 [INFO] [stderr] Compiling console v0.7.7 [INFO] [stderr] Compiling indicatif v0.10.3 [INFO] [stderr] Compiling serde_derive v1.0.111 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling rustlings v2.2.1 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 18s [INFO] running `"docker" "inspect" "da7428d62478bab9a858e8ff68755a64e094f708b82e734d653601b2ca7daf59"` [INFO] running `"docker" "rm" "-f" "da7428d62478bab9a858e8ff68755a64e094f708b82e734d653601b2ca7daf59"` [INFO] [stdout] da7428d62478bab9a858e8ff68755a64e094f708b82e734d653601b2ca7daf59 [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=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" "+beta-2020-06-03" "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] 8f7c23814db9816b6b1e891ca39503b0e6acb7ee2268009e69a406e3964708a5 [INFO] running `"docker" "start" "-a" "8f7c23814db9816b6b1e891ca39503b0e6acb7ee2268009e69a406e3964708a5"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling escargot v0.4.0 [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 v1.0.53 [INFO] [stderr] Compiling assert_cmd v0.11.1 [INFO] [stderr] Compiling rustlings v2.2.1 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 16.34s [INFO] running `"docker" "inspect" "8f7c23814db9816b6b1e891ca39503b0e6acb7ee2268009e69a406e3964708a5"` [INFO] running `"docker" "rm" "-f" "8f7c23814db9816b6b1e891ca39503b0e6acb7ee2268009e69a406e3964708a5"` [INFO] [stdout] 8f7c23814db9816b6b1e891ca39503b0e6acb7ee2268009e69a406e3964708a5 [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=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" "+beta-2020-06-03" "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] c3f95ac7e30d3ce9d3a8ee020effa52a0f570f0396dca722f570118422d2442a [INFO] running `"docker" "start" "-a" "c3f95ac7e30d3ce9d3a8ee020effa52a0f570f0396dca722f570118422d2442a"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.12s [INFO] [stdout] running 3 tests [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rustlings-2f6b1afc5eb7a781 [INFO] [stdout] test exercise::test::test_pending_state ... ok [INFO] [stdout] test exercise::test::test_finished_exercise ... ok [INFO] [stdout] test exercise::test::test_clean ... FAILED [INFO] [stdout] [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:210:9 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x55a75ebb0ce5 - backtrace::backtrace::libunwind::trace::h07c956be65d9b461 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x55a75ebb0ce5 - backtrace::backtrace::trace_unsynchronized::h2fdb9e4177ad4d20 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x55a75ebb0ce5 - std::sys_common::backtrace::_print_fmt::ha62d8426311107ac [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x55a75ebb0ce5 - ::fmt::h3ec6bdab62f1e8d9 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x55a75ebd92dc - core::fmt::write::h935cb0ed4078a853 [INFO] [stdout] at src/libcore/fmt/mod.rs:1076 [INFO] [stdout] 5: 0x55a75e9a8a15 - std::io::Write::write_fmt::h944a31ab04b0dfe4 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/io/mod.rs:1537 [INFO] [stdout] 6: 0x55a75ebaaed1 - std::io::impls::>::write_fmt::h6bd94c41a9c566d2 [INFO] [stdout] at src/libstd/io/impls.rs:176 [INFO] [stdout] 7: 0x55a75ebb3510 - std::sys_common::backtrace::_print::h460db802d801ccf8 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x55a75ebb3510 - std::sys_common::backtrace::print::h399d664f56640530 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x55a75ebb3510 - std::panicking::default_hook::{{closure}}::hc6dfd87957c765b8 [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x55a75ebb320a - std::panicking::default_hook::hfdceba6d6d1a18ae [INFO] [stdout] at src/libstd/panicking.rs:215 [INFO] [stdout] 11: 0x55a75ebb3b47 - std::panicking::rust_panic_with_hook::hd01e282bff1b1e63 [INFO] [stdout] at src/libstd/panicking.rs:486 [INFO] [stdout] 12: 0x55a75ebb374b - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:388 [INFO] [stdout] 13: 0x55a75ebd7c71 - core::panicking::panic_fmt::habd7df443069602c [INFO] [stdout] at src/libcore/panicking.rs:101 [INFO] [stdout] 14: 0x55a75ebd7a93 - core::option::expect_none_failed::h721078758a086285 [INFO] [stdout] at src/libcore/option.rs:1272 [INFO] [stdout] 15: 0x55a75e99ac2b - core::result::Result::unwrap::h783f5de0ee27a3d6 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libcore/result.rs:1005 [INFO] [stdout] 16: 0x55a75e9a1dc3 - rustlings::exercise::test::test_clean::h741b579fbbb04bc0 [INFO] [stdout] at src/exercise.rs:210 [INFO] [stdout] 17: 0x55a75e9a1d7a - rustlings::exercise::test::test_clean::{{closure}}::hcfdab9bf4ff318f8 [INFO] [stdout] at src/exercise.rs:209 [INFO] [stdout] 18: 0x55a75e99999e - core::ops::function::FnOnce::call_once::h578d55734b8365c1 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libcore/ops/function.rs:232 [INFO] [stdout] 19: 0x55a75e9cfe02 - as core::ops::function::FnOnce>::call_once::hd23431bd7b767a0c [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/liballoc/boxed.rs:1076 [INFO] [stdout] 20: 0x55a75e9cfe02 - as core::ops::function::FnOnce<()>>::call_once::h6986d2e83b783a4e [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panic.rs:318 [INFO] [stdout] 21: 0x55a75e9cfe02 - std::panicking::try::do_call::haee67871ebe8ee92 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panicking.rs:297 [INFO] [stdout] 22: 0x55a75e9cfe02 - std::panicking::try::hcba534043f17f42d [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panicking.rs:274 [INFO] [stdout] 23: 0x55a75e9cfe02 - std::panic::catch_unwind::h6908c2ae7517b434 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panic.rs:394 [INFO] [stdout] 24: 0x55a75e9cfe02 - test::run_test_in_process::h66277a63b8267865 [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 25: 0x55a75e9cfe02 - test::run_test::run_test_inner::{{closure}}::h591f321b83c3f302 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 26: 0x55a75e9a7ed6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h843e47ea29613666 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 27: 0x55a75e9ad475 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::ha6c43669df0cbe25 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/thread/mod.rs:475 [INFO] [stdout] 28: 0x55a75e9ad475 - as core::ops::function::FnOnce<()>>::call_once::hc86e5439e615a14a [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panic.rs:318 [INFO] [stdout] 29: 0x55a75e9ad475 - std::panicking::try::do_call::h4b45bcf4d5d82a80 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panicking.rs:297 [INFO] [stdout] 30: 0x55a75e9ad475 - std::panicking::try::h297c0c407d3f8196 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panicking.rs:274 [INFO] [stdout] 31: 0x55a75e9ad475 - std::panic::catch_unwind::h877baa9fbef2eafe [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/panic.rs:394 [INFO] [stdout] 32: 0x55a75e9ad475 - std::thread::Builder::spawn_unchecked::{{closure}}::hdb000626ad29158a [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libstd/thread/mod.rs:474 [INFO] [stdout] 33: 0x55a75e9ad475 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h87e786b011f05b5c [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/libcore/ops/function.rs:232 [INFO] [stdout] 34: 0x55a75ebb9fda - as core::ops::function::FnOnce>::call_once::hfc5c0e64036d1b09 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/liballoc/boxed.rs:1076 [INFO] [stdout] 35: 0x55a75ebb9fda - as core::ops::function::FnOnce>::call_once::hf3d73184efc070c1 [INFO] [stdout] at /rustc/b7dc83a3f6ca9746fb3d121761c3605477b77d90/src/liballoc/boxed.rs:1076 [INFO] [stdout] 36: 0x55a75ebb9fda - std::sys::unix::thread::Thread::new::thread_start::hb9eb749d91dfe8e2 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 37: 0x7f61f2b97609 - start_thread [INFO] [stdout] 38: 0x7f61f2cd9103 - __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" "c3f95ac7e30d3ce9d3a8ee020effa52a0f570f0396dca722f570118422d2442a"` [INFO] running `"docker" "rm" "-f" "c3f95ac7e30d3ce9d3a8ee020effa52a0f570f0396dca722f570118422d2442a"` [INFO] [stdout] c3f95ac7e30d3ce9d3a8ee020effa52a0f570f0396dca722f570118422d2442a