[INFO] cloning repository https://github.com/alexclear/rust-koans-answers [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexclear/rust-koans-answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 89e124c056c315e10c6d5ab8548902c0cfc64be5 [INFO] checking alexclear/rust-koans-answers against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-2/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112 [INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/alexclear/rust-koans-answers [INFO] finished tweaking git repo https://github.com/alexclear/rust-koans-answers [INFO] tweaked toml for git repo https://github.com/alexclear/rust-koans-answers written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/alexclear/rust-koans-answers already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 7856a12f104db67b9be2187f1dd9b1c20368ce073848a7edf2e912d6fb33a4df [INFO] running `"docker" "start" "-a" "7856a12f104db67b9be2187f1dd9b1c20368ce073848a7edf2e912d6fb33a4df"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling koans v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.0 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-a6705c3253469995/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', build.rs:4:5 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5639ee515154 - backtrace::backtrace::libunwind::trace::h98d3444f0ad70429 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x5639ee515154 - backtrace::backtrace::trace_unsynchronized::h37f821d20053e6cd [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x5639ee515154 - std::sys_common::backtrace::_print_fmt::hff04dc7e915a3c85 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x5639ee515154 - ::fmt::h61891c439a79f00d [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x5639ee53291c - core::fmt::write::hdf236390fbd68d3d [INFO] [stderr] at src/libcore/fmt/mod.rs:1069 [INFO] [stderr] 5: 0x5639ee513a53 - std::io::Write::write_fmt::h55f7fe3633ce766f [INFO] [stderr] at src/libstd/io/mod.rs:1537 [INFO] [stderr] 6: 0x5639ee517675 - std::sys_common::backtrace::_print::h78339381acb79e1b [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x5639ee517675 - std::sys_common::backtrace::print::h525aa9f9405c80a1 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x5639ee517675 - std::panicking::default_hook::{{closure}}::hace90b8a218287e6 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x5639ee5173c7 - std::panicking::default_hook::h160b6beccc49b335 [INFO] [stderr] at src/libstd/panicking.rs:218 [INFO] [stderr] 10: 0x5639ee517c68 - std::panicking::rust_panic_with_hook::h36f6804eea3f553a [INFO] [stderr] at src/libstd/panicking.rs:486 [INFO] [stderr] 11: 0x5639ee51786b - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:388 [INFO] [stderr] 12: 0x5639ee531d01 - core::panicking::panic_fmt::hd101a87121fa411f [INFO] [stderr] at src/libcore/panicking.rs:101 [INFO] [stderr] 13: 0x5639ee531b23 - core::option::expect_none_failed::h4f0e89faa3179bf7 [INFO] [stderr] at src/libcore/option.rs:1272 [INFO] [stderr] 14: 0x5639ee50f29b - core::result::Result::unwrap::h6cab0df86d7ee613 [INFO] [stderr] at /rustc/8a749131e7beb72f6edacefd2bdcbed3d67b2112/src/libcore/result.rs:1005 [INFO] [stderr] 15: 0x5639ee50f8ab - build_script_build::main::ha52283e75ebb0edd [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 16: 0x5639ee50f7ab - std::rt::lang_start::{{closure}}::h4b1b2f87429f9798 [INFO] [stderr] at /rustc/8a749131e7beb72f6edacefd2bdcbed3d67b2112/src/libstd/rt.rs:67 [INFO] [stderr] 17: 0x5639ee518059 - std::rt::lang_start_internal::{{closure}}::h7c7701ace7781644 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 18: 0x5639ee518059 - std::panicking::try::do_call::h25761ef781a3cec3 [INFO] [stderr] at src/libstd/panicking.rs:297 [INFO] [stderr] 19: 0x5639ee518059 - std::panicking::try::hc2ed2ebc2df17cc1 [INFO] [stderr] at src/libstd/panicking.rs:274 [INFO] [stderr] 20: 0x5639ee518059 - std::panic::catch_unwind::h548ef5f09b7c73ca [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 21: 0x5639ee518059 - std::rt::lang_start_internal::h9a98dc8e2c22711e [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 22: 0x5639ee50f787 - std::rt::lang_start::h4f3a23c0c5c28f05 [INFO] [stderr] at /rustc/8a749131e7beb72f6edacefd2bdcbed3d67b2112/src/libstd/rt.rs:67 [INFO] [stderr] 23: 0x5639ee50f8ea - main [INFO] [stderr] 24: 0x7f160fb8f0b3 - __libc_start_main [INFO] [stderr] 25: 0x5639ee50f17e - _start [INFO] [stderr] 26: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "7856a12f104db67b9be2187f1dd9b1c20368ce073848a7edf2e912d6fb33a4df"` [INFO] running `"docker" "rm" "-f" "7856a12f104db67b9be2187f1dd9b1c20368ce073848a7edf2e912d6fb33a4df"` [INFO] [stdout] 7856a12f104db67b9be2187f1dd9b1c20368ce073848a7edf2e912d6fb33a4df