[INFO] updating cached repository https://github.com/JScearcy/Rust-Koans [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] cb4bceeb057657f833916c019f96605c7170382c [INFO] checking JScearcy/Rust-Koans against try#d27c6c6a469a28343396a8f3ac1c9d403aabda69 for pr-66037 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJScearcy%2FRust-Koans" "/workspace/builds/worker-3/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/JScearcy/Rust-Koans on toolchain d27c6c6a469a28343396a8f3ac1c9d403aabda69 [INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/JScearcy/Rust-Koans [INFO] finished tweaking git repo https://github.com/JScearcy/Rust-Koans [INFO] tweaked toml for git repo https://github.com/JScearcy/Rust-Koans written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/JScearcy/Rust-Koans already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "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] 22758e06b900a5da3d7bfbe207d2139d9ee4f3e5ba77e75ebd1e68690bd5a20e [INFO] running `"docker" "start" "-a" "22758e06b900a5da3d7bfbe207d2139d9ee4f3e5ba77e75ebd1e68690bd5a20e"` [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-3272a2a739cfbe5a/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: 0x55f948423014 - backtrace::backtrace::libunwind::trace::h7f6a16d12232c961 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x55f948423014 - backtrace::backtrace::trace_unsynchronized::h80308da2c2f00997 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55f948423014 - std::sys_common::backtrace::_print_fmt::he1209b8ba63c9fd2 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:77 [INFO] [stderr] 3: 0x55f948423014 - ::fmt::h8daf2ba8ed48f971 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x55f948439e8c - core::fmt::write::hd6c5c9ab01551e29 [INFO] [stderr] at src/libcore/fmt/mod.rs:1057 [INFO] [stderr] 5: 0x55f948421897 - std::io::Write::write_fmt::h92dca42149c54903 [INFO] [stderr] at src/libstd/io/mod.rs:1426 [INFO] [stderr] 6: 0x55f948424fb5 - std::sys_common::backtrace::_print::hfc0ffaecef6820ce [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x55f948424fb5 - std::sys_common::backtrace::print::hb2f3121d5ded79bb [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x55f948424fb5 - std::panicking::default_hook::{{closure}}::h48ee859394646c26 [INFO] [stderr] at src/libstd/panicking.rs:195 [INFO] [stderr] 9: 0x55f948424ca1 - std::panicking::default_hook::he04601656067c23b [INFO] [stderr] at src/libstd/panicking.rs:215 [INFO] [stderr] 10: 0x55f94842556a - std::panicking::rust_panic_with_hook::h1a13a61ec549b61a [INFO] [stderr] at src/libstd/panicking.rs:463 [INFO] [stderr] 11: 0x55f948425150 - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:371 [INFO] [stderr] 12: 0x55f9484391d1 - core::panicking::panic_fmt::hf9765164329c732e [INFO] [stderr] at src/libcore/panicking.rs:85 [INFO] [stderr] 13: 0x55f948438ff3 - core::option::expect_none_failed::h673062ee969d5ec3 [INFO] [stderr] at src/libcore/option.rs:1198 [INFO] [stderr] 14: 0x55f94841e75f - core::result::Result::unwrap::h8803603091c404f2 [INFO] [stderr] at /rustc/d27c6c6a469a28343396a8f3ac1c9d403aabda69/src/libcore/result.rs:962 [INFO] [stderr] 15: 0x55f94841e67b - build_script_build::main::h68df5ccd6d10c082 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 16: 0x55f94841e5f0 - std::rt::lang_start::{{closure}}::h48ba1507de9b7e33 [INFO] [stderr] at /rustc/d27c6c6a469a28343396a8f3ac1c9d403aabda69/src/libstd/rt.rs:67 [INFO] [stderr] 17: 0x55f948425083 - std::rt::lang_start_internal::{{closure}}::h3b078c3da4627c97 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 18: 0x55f948425083 - std::panicking::try::do_call::hf3bd84286ccd6179 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 19: 0x55f948426dda - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:79 [INFO] [stderr] 20: 0x55f948425a10 - std::panicking::try::hcb0fe9f753e69b09 [INFO] [stderr] at src/libstd/panicking.rs:272 [INFO] [stderr] 21: 0x55f948425a10 - std::panic::catch_unwind::h75eb9eb43d127e80 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 22: 0x55f948425a10 - std::rt::lang_start_internal::hb7f339488e9d1f13 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 23: 0x55f94841e5c9 - std::rt::lang_start::h828615b90d65148b [INFO] [stderr] at /rustc/d27c6c6a469a28343396a8f3ac1c9d403aabda69/src/libstd/rt.rs:67 [INFO] [stderr] 24: 0x55f94841e6ba - main [INFO] [stderr] 25: 0x7fd40aac6b97 - __libc_start_main [INFO] [stderr] 26: 0x55f94841e00a - _start [INFO] [stderr] 27: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "22758e06b900a5da3d7bfbe207d2139d9ee4f3e5ba77e75ebd1e68690bd5a20e"` [INFO] running `"docker" "rm" "-f" "22758e06b900a5da3d7bfbe207d2139d9ee4f3e5ba77e75ebd1e68690bd5a20e"` [INFO] [stdout] 22758e06b900a5da3d7bfbe207d2139d9ee4f3e5ba77e75ebd1e68690bd5a20e