[INFO] updating cached repository https://github.com/hoyley/koans-rust [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] 1a10ea949df9397eccea9049e03ea8e6ae3cd69e [INFO] checking hoyley/koans-rust against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoyley%2Fkoans-rust" "/workspace/builds/worker-13/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hoyley/koans-rust on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc [INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/hoyley/koans-rust [INFO] finished tweaking git repo https://github.com/hoyley/koans-rust [INFO] tweaked toml for git repo https://github.com/hoyley/koans-rust written to /workspace/builds/worker-13/source/Cargo.toml [INFO] crate git repo https://github.com/hoyley/koans-rust already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 5a7877f22894c726bc98d10d929828c3bca503ffb4ba561b9dc12e7b69282b98 [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" "5a7877f22894c726bc98d10d929828c3bca503ffb4ba561b9dc12e7b69282b98"` [INFO] [stderr] Compiling koans v0.2.2 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.2 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-df26fd1b921d3d69/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'Read-only file system (os error 30)', build.rs:13:22 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5565bb3e4a24 - backtrace::backtrace::libunwind::trace::hda902e3a4eb9d449 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x5565bb3e4a24 - backtrace::backtrace::trace_unsynchronized::h06df0062bb63b7e2 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x5565bb3e4a24 - std::sys_common::backtrace::_print_fmt::ha5249daf78f399e8 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x5565bb3e4a24 - ::fmt::h68243ef2eafa8843 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x5565bb40282c - core::fmt::write::h8b50d07b82ae3922 [INFO] [stderr] at src/libcore/fmt/mod.rs:1069 [INFO] [stderr] 5: 0x5565bb3e3253 - std::io::Write::write_fmt::h9a5b9a212b705549 [INFO] [stderr] at src/libstd/io/mod.rs:1504 [INFO] [stderr] 6: 0x5565bb3e6fc5 - std::sys_common::backtrace::_print::hcd11fe8eb9e7335d [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x5565bb3e6fc5 - std::sys_common::backtrace::print::h475286256f91474c [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x5565bb3e6fc5 - std::panicking::default_hook::{{closure}}::h2a45e9d6ef27161b [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x5565bb3e6d02 - std::panicking::default_hook::h76adec688b27abdd [INFO] [stderr] at src/libstd/panicking.rs:218 [INFO] [stderr] 10: 0x5565bb3e75d2 - std::panicking::rust_panic_with_hook::h121f4f2c52efbcbf [INFO] [stderr] at src/libstd/panicking.rs:511 [INFO] [stderr] 11: 0x5565bb3e71bb - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:419 [INFO] [stderr] 12: 0x5565bb3e712b - std::panicking::begin_panic_fmt::h5f1d91daa2b5823b [INFO] [stderr] at src/libstd/panicking.rs:373 [INFO] [stderr] 13: 0x5565bb3dca98 - build_script_build::main::h744aa1113b77df7e [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 14: 0x5565bb3dc7eb - std::rt::lang_start::{{closure}}::hcbdc7eb8321d245b [INFO] [stderr] at /rustc/bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc/src/libstd/rt.rs:67 [INFO] [stderr] 15: 0x5565bb3e7a18 - std::rt::lang_start_internal::{{closure}}::h15b56bd7f81214ad [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 16: 0x5565bb3e7a18 - std::panicking::try::do_call::hbe8467da291bc822 [INFO] [stderr] at src/libstd/panicking.rs:331 [INFO] [stderr] 17: 0x5565bb3e7a18 - std::panicking::try::hde3b5cbc6989304d [INFO] [stderr] at src/libstd/panicking.rs:274 [INFO] [stderr] 18: 0x5565bb3e7a18 - std::panic::catch_unwind::h56844acb323fdd6c [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 19: 0x5565bb3e7a18 - std::rt::lang_start_internal::hae379591a9420b87 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 20: 0x5565bb3dc7c7 - std::rt::lang_start::h0638f6b964819dad [INFO] [stderr] at /rustc/bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc/src/libstd/rt.rs:67 [INFO] [stderr] 21: 0x5565bb3dcb6a - main [INFO] [stderr] 22: 0x7fe9bf48eb97 - __libc_start_main [INFO] [stderr] 23: 0x5565bb3d96fa - _start [INFO] [stderr] 24: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "5a7877f22894c726bc98d10d929828c3bca503ffb4ba561b9dc12e7b69282b98"` [INFO] running `"docker" "rm" "-f" "5a7877f22894c726bc98d10d929828c3bca503ffb4ba561b9dc12e7b69282b98"` [INFO] [stdout] 5a7877f22894c726bc98d10d929828c3bca503ffb4ba561b9dc12e7b69282b98