[INFO] updating cached repository https://github.com/alexclear/rust-koans-answers [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] 89e124c056c315e10c6d5ab8548902c0cfc64be5 [INFO] checking alexclear/rust-koans-answers against try#3ae4c050387df9f7fbb379ee90ce8bf05e566870 for pr-70872 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-1/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 3ae4c050387df9f7fbb379ee90ce8bf05e566870 [INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "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-1/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" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "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] 30af5b1f652a3ca8e56935095577fab2e11228bd92f6e2cf49885e5c7b67ec6b [INFO] running `"docker" "start" "-a" "30af5b1f652a3ca8e56935095577fab2e11228bd92f6e2cf49885e5c7b67ec6b"` [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-cfc8f8d64ab75a06/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: 0x55dd75570b24 - backtrace::backtrace::libunwind::trace::h0e3d041735dd3c36 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x55dd75570b24 - backtrace::backtrace::trace_unsynchronized::hf661c3539475c479 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55dd75570b24 - std::sys_common::backtrace::_print_fmt::h7e5d3849e201f6ea [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x55dd75570b24 - ::fmt::h08f9193b217d15de [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x55dd7558e8ac - core::fmt::write::h8f758020ef45663a [INFO] [stderr] at src/libcore/fmt/mod.rs:1069 [INFO] [stderr] 5: 0x55dd7556f353 - std::io::Write::write_fmt::ha2788daa3b0524bb [INFO] [stderr] at src/libstd/io/mod.rs:1439 [INFO] [stderr] 6: 0x55dd75573045 - std::sys_common::backtrace::_print::h5d5ed42d936ac6f5 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x55dd75573045 - std::sys_common::backtrace::print::h7a9fa55a14f6ae07 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x55dd75573045 - std::panicking::default_hook::{{closure}}::hdbcb496daaaedb20 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x55dd75572d82 - std::panicking::default_hook::h78dd6ded32a6b9f4 [INFO] [stderr] at src/libstd/panicking.rs:218 [INFO] [stderr] 10: 0x55dd75573652 - std::panicking::rust_panic_with_hook::hbaa57fe2fb2cee10 [INFO] [stderr] at src/libstd/panicking.rs:511 [INFO] [stderr] 11: 0x55dd7557323b - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:419 [INFO] [stderr] 12: 0x55dd7558dc91 - core::panicking::panic_fmt::h69da511deac721a1 [INFO] [stderr] at src/libcore/panicking.rs:111 [INFO] [stderr] 13: 0x55dd7558dab3 - core::option::expect_none_failed::h0605cdd7e01868c7 [INFO] [stderr] at src/libcore/option.rs:1268 [INFO] [stderr] 14: 0x55dd7556b3eb - core::result::Result::unwrap::h776b2cd297df2f75 [INFO] [stderr] at /rustc/3ae4c050387df9f7fbb379ee90ce8bf05e566870/src/libcore/result.rs:1005 [INFO] [stderr] 15: 0x55dd7556b6ab - build_script_build::main::h65a6f020c1090a6b [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 16: 0x55dd7556bddb - std::rt::lang_start::{{closure}}::hdf46f7c31735e02d [INFO] [stderr] at /rustc/3ae4c050387df9f7fbb379ee90ce8bf05e566870/src/libstd/rt.rs:67 [INFO] [stderr] 17: 0x55dd75573a98 - std::rt::lang_start_internal::{{closure}}::h1318542af918f4c3 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 18: 0x55dd75573a98 - std::panicking::try::do_call::h22a55f61af97d97a [INFO] [stderr] at src/libstd/panicking.rs:331 [INFO] [stderr] 19: 0x55dd75573a98 - std::panicking::try::h379f96f302679446 [INFO] [stderr] at src/libstd/panicking.rs:274 [INFO] [stderr] 20: 0x55dd75573a98 - std::panic::catch_unwind::h0a3e332d950e369f [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 21: 0x55dd75573a98 - std::rt::lang_start_internal::h7e2f02b700016c99 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 22: 0x55dd7556bdb7 - std::rt::lang_start::h640a28f1482a761a [INFO] [stderr] at /rustc/3ae4c050387df9f7fbb379ee90ce8bf05e566870/src/libstd/rt.rs:67 [INFO] [stderr] 23: 0x55dd7556b6ea - main [INFO] [stderr] 24: 0x7f58894aeb97 - __libc_start_main [INFO] [stderr] 25: 0x55dd7556b24a - _start [INFO] [stderr] 26: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "30af5b1f652a3ca8e56935095577fab2e11228bd92f6e2cf49885e5c7b67ec6b"` [INFO] running `"docker" "rm" "-f" "30af5b1f652a3ca8e56935095577fab2e11228bd92f6e2cf49885e5c7b67ec6b"` [INFO] [stdout] 30af5b1f652a3ca8e56935095577fab2e11228bd92f6e2cf49885e5c7b67ec6b