[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 try#7cb06892a23b4da510686618c8730f0b2e8bd952 for pr-66963 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoyley%2Fkoans-rust" "/workspace/builds/worker-14/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hoyley/koans-rust on toolchain 7cb06892a23b4da510686618c8730f0b2e8bd952 [INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "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-14/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" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "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] 3ccdd002acf4b65ea913ec68a96dc2f1f7dc8f94b161c82f28039c8824541d20 [INFO] running `"docker" "start" "-a" "3ccdd002acf4b65ea913ec68a96dc2f1f7dc8f94b161c82f28039c8824541d20"` [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-ad1e082eabc69609/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: 0x55f722188c54 - backtrace::backtrace::libunwind::trace::hdb81db0bd6831d04 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x55f722188c54 - backtrace::backtrace::trace_unsynchronized::h38672f8e088162ec [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55f722188c54 - std::sys_common::backtrace::_print_fmt::h3477885c1cf600bf [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:84 [INFO] [stderr] 3: 0x55f722188c54 - ::fmt::h1b1db80893bb1d47 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:61 [INFO] [stderr] 4: 0x55f7221a157c - core::fmt::write::hb45c0f2659d06ea0 [INFO] [stderr] at src/libcore/fmt/mod.rs:1024 [INFO] [stderr] 5: 0x55f7221874e7 - std::io::Write::write_fmt::h69aed8c2f069f95a [INFO] [stderr] at src/libstd/io/mod.rs:1428 [INFO] [stderr] 6: 0x55f72218abbe - std::sys_common::backtrace::_print::h7994adb630479b56 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:65 [INFO] [stderr] 7: 0x55f72218abbe - std::sys_common::backtrace::print::h3b61bc008bfbd441 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:50 [INFO] [stderr] 8: 0x55f72218abbe - std::panicking::default_hook::{{closure}}::h3fe670170d668cf0 [INFO] [stderr] at src/libstd/panicking.rs:193 [INFO] [stderr] 9: 0x55f72218a8b1 - std::panicking::default_hook::h3b06cb1df08e0592 [INFO] [stderr] at src/libstd/panicking.rs:210 [INFO] [stderr] 10: 0x55f72218b1eb - std::panicking::rust_panic_with_hook::h1d228350fd59b915 [INFO] [stderr] at src/libstd/panicking.rs:471 [INFO] [stderr] 11: 0x55f72218ad9e - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:375 [INFO] [stderr] 12: 0x55f72218ace0 - std::panicking::begin_panic_fmt::h624bf3b2f0bc3952 [INFO] [stderr] at src/libstd/panicking.rs:326 [INFO] [stderr] 13: 0x55f7221837e6 - build_script_build::main::h29945c9f04c1d4cc [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 14: 0x55f722182f00 - std::rt::lang_start::{{closure}}::h41fbc2f6002cc19a [INFO] [stderr] at /rustc/7cb06892a23b4da510686618c8730f0b2e8bd952/src/libstd/rt.rs:67 [INFO] [stderr] 15: 0x55f72218ac83 - std::rt::lang_start_internal::{{closure}}::h1784eb06fa376c84 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 16: 0x55f72218ac83 - std::panicking::try::do_call::hc1b239edbaea435b [INFO] [stderr] at src/libstd/panicking.rs:292 [INFO] [stderr] 17: 0x55f72218ca2a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:78 [INFO] [stderr] 18: 0x55f72218b680 - std::panicking::try::h3488fc3f1d3c9eea [INFO] [stderr] at src/libstd/panicking.rs:270 [INFO] [stderr] 19: 0x55f72218b680 - std::panic::catch_unwind::h2a34869edc5a61ae [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 20: 0x55f72218b680 - std::rt::lang_start_internal::h0cda2cb9c4b6b0f8 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 21: 0x55f722182ed9 - std::rt::lang_start::hec226fe665879f5f [INFO] [stderr] at /rustc/7cb06892a23b4da510686618c8730f0b2e8bd952/src/libstd/rt.rs:67 [INFO] [stderr] 22: 0x55f7221839ca - main [INFO] [stderr] 23: 0x7fc667994b97 - __libc_start_main [INFO] [stderr] 24: 0x55f72218204a - _start [INFO] [stderr] 25: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "3ccdd002acf4b65ea913ec68a96dc2f1f7dc8f94b161c82f28039c8824541d20"` [INFO] running `"docker" "rm" "-f" "3ccdd002acf4b65ea913ec68a96dc2f1f7dc8f94b161c82f28039c8824541d20"` [INFO] [stdout] 3ccdd002acf4b65ea913ec68a96dc2f1f7dc8f94b161c82f28039c8824541d20