[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#98d5ea1855f1028095b37c493ba31093c8519d68 for pr-69548 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-4/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 98d5ea1855f1028095b37c493ba31093c8519d68 [INFO] running `"/workspace/cargo-home/bin/cargo" "+98d5ea1855f1028095b37c493ba31093c8519d68" "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-4/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" "+98d5ea1855f1028095b37c493ba31093c8519d68" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+98d5ea1855f1028095b37c493ba31093c8519d68" "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] f533300ed8bd189b84b0750949a9b104affbf66180db0e2223de47104da9eb94 [INFO] running `"docker" "start" "-a" "f533300ed8bd189b84b0750949a9b104affbf66180db0e2223de47104da9eb94"` [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-13f54173da74cfcf/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: 0x559b48344534 - backtrace::backtrace::libunwind::trace::h24a5370b1319bd7a [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x559b48344534 - backtrace::backtrace::trace_unsynchronized::h379c9792f6ef4460 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x559b48344534 - std::sys_common::backtrace::_print_fmt::h3a5b75e57443723b [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x559b48344534 - ::fmt::h687231ba2da68c61 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x559b4835d25c - core::fmt::write::hcd5b491a4c454b4c [INFO] [stderr] at src/libcore/fmt/mod.rs:1053 [INFO] [stderr] 5: 0x559b48342c87 - std::io::Write::write_fmt::h1941e8ffe6b84e9d [INFO] [stderr] at src/libstd/io/mod.rs:1428 [INFO] [stderr] 6: 0x559b48346925 - std::sys_common::backtrace::_print::h7d1ce732706a3f42 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x559b48346925 - std::sys_common::backtrace::print::h5a2c706016c622b7 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x559b48346925 - std::panicking::default_hook::{{closure}}::h8bfd3f5bb7a4dc18 [INFO] [stderr] at src/libstd/panicking.rs:204 [INFO] [stderr] 9: 0x559b48346667 - std::panicking::default_hook::h4d543fda461ebcf5 [INFO] [stderr] at src/libstd/panicking.rs:224 [INFO] [stderr] 10: 0x559b48346ee2 - std::panicking::rust_panic_with_hook::h19e61792824f3a44 [INFO] [stderr] at src/libstd/panicking.rs:470 [INFO] [stderr] 11: 0x559b48346acb - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:378 [INFO] [stderr] 12: 0x559b4835c5d1 - core::panicking::panic_fmt::h964c909962d2459f [INFO] [stderr] at src/libcore/panicking.rs:85 [INFO] [stderr] 13: 0x559b4835c3f3 - core::option::expect_none_failed::hcb1aac314c055b07 [INFO] [stderr] at src/libcore/option.rs:1211 [INFO] [stderr] 14: 0x559b4833f2ab - core::result::Result::unwrap::hb0e42bebb7395348 [INFO] [stderr] at /rustc/98d5ea1855f1028095b37c493ba31093c8519d68/src/libcore/result.rs:1003 [INFO] [stderr] 15: 0x559b4833f9ab - build_script_build::main::ha181a35f8d8f7fe0 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 16: 0x559b4833f6fb - std::rt::lang_start::{{closure}}::hd3fd26488c8142b0 [INFO] [stderr] at /rustc/98d5ea1855f1028095b37c493ba31093c8519d68/src/libstd/rt.rs:67 [INFO] [stderr] 17: 0x559b483469f3 - std::rt::lang_start_internal::{{closure}}::h61d5c3451bec072d [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 18: 0x559b483469f3 - std::panicking::try::do_call::hdd0e17410f503003 [INFO] [stderr] at src/libstd/panicking.rs:303 [INFO] [stderr] 19: 0x559b48348767 - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:86 [INFO] [stderr] 20: 0x559b48347389 - std::panicking::try::h8119bff16c4e7a4b [INFO] [stderr] at src/libstd/panicking.rs:281 [INFO] [stderr] 21: 0x559b48347389 - std::panic::catch_unwind::hd3df37601ad6cabd [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 22: 0x559b48347389 - std::rt::lang_start_internal::hf39ed062aa77af27 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 23: 0x559b4833f6d7 - std::rt::lang_start::h102c965620d7e43d [INFO] [stderr] at /rustc/98d5ea1855f1028095b37c493ba31093c8519d68/src/libstd/rt.rs:67 [INFO] [stderr] 24: 0x559b4833f9ea - main [INFO] [stderr] 25: 0x7fec53bdfb97 - __libc_start_main [INFO] [stderr] 26: 0x559b4833ef1a - _start [INFO] [stderr] 27: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "f533300ed8bd189b84b0750949a9b104affbf66180db0e2223de47104da9eb94"` [INFO] running `"docker" "rm" "-f" "f533300ed8bd189b84b0750949a9b104affbf66180db0e2223de47104da9eb94"` [INFO] [stdout] f533300ed8bd189b84b0750949a9b104affbf66180db0e2223de47104da9eb94