[INFO] updating cached repository bitcartel/rust-koans-solutions [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/bitcartel/rust-koans-solutions [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/bitcartel/rust-koans-solutions" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/bitcartel/rust-koans-solutions"` [INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/bitcartel/rust-koans-solutions'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/bitcartel/rust-koans-solutions" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/bitcartel/rust-koans-solutions"` [INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/bitcartel/rust-koans-solutions'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] fa1cc79b191627ba13abd5c639ffff97f6c9e08a [INFO] sha for GitHub repo bitcartel/rust-koans-solutions: fa1cc79b191627ba13abd5c639ffff97f6c9e08a [INFO] validating manifest of bitcartel/rust-koans-solutions on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of bitcartel/rust-koans-solutions on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing bitcartel/rust-koans-solutions [INFO] finished frobbing bitcartel/rust-koans-solutions [INFO] frobbed toml for bitcartel/rust-koans-solutions written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/bitcartel/rust-koans-solutions/Cargo.toml [INFO] started frobbing bitcartel/rust-koans-solutions [INFO] finished frobbing bitcartel/rust-koans-solutions [INFO] frobbed toml for bitcartel/rust-koans-solutions written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/bitcartel/rust-koans-solutions/Cargo.toml [INFO] crate bitcartel/rust-koans-solutions already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking bitcartel/rust-koans-solutions against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-0/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/bitcartel/rust-koans-solutions:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 32a5b282a74b8fed62cacb2062d210da6e553fc7ce342c102f756b5869e81acf [INFO] running `"docker" "start" "-a" "32a5b282a74b8fed62cacb2062d210da6e553fc7ce342c102f756b5869e81acf"` [INFO] [stderr] Compiling koans v0.2.2 (/opt/crater/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.2 (/opt/crater/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/koans-e1a0d9632c46dee3/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: 0x56335a49d2cb - backtrace::backtrace::libunwind::trace::h5d27dcba3b250cfe [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x56335a49d2cb - backtrace::backtrace::trace_unsynchronized::h239341a8b1cadbab [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x56335a49d2cb - std::sys_common::backtrace::_print::hb0e5dd39180a1838 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x56335a49d2cb - std::sys_common::backtrace::print::h9b385b2285f057b8 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x56335a49d2cb - std::panicking::default_hook::{{closure}}::he3310a15a78966b4 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x56335a49cfa6 - std::panicking::default_hook::h2986f418df62eff4 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x56335a49d98d - std::panicking::rust_panic_with_hook::h15065386631d2a9d [INFO] [stderr] at src/libstd/panicking.rs:477 [INFO] [stderr] 7: 0x56335a49d512 - std::panicking::continue_panic_fmt::h5e7761875fda3864 [INFO] [stderr] at src/libstd/panicking.rs:384 [INFO] [stderr] 8: 0x56335a49d45f - std::panicking::begin_panic_fmt::h23e4c9022d6fc089 [INFO] [stderr] at src/libstd/panicking.rs:339 [INFO] [stderr] 9: 0x56335a495a86 - build_script_build::main::hf9b4ee1f6e0758ef [INFO] [stderr] at /opt/crater/workdir/build.rs:13 [INFO] [stderr] 10: 0x56335a495000 - std::rt::lang_start::{{closure}}::hcde600d7114240f6 [INFO] [stderr] at /rustc/452087b4bf18cece2d52d7cd8c9147195e5404bf/src/libstd/rt.rs:64 [INFO] [stderr] 11: 0x56335a49d3e3 - std::rt::lang_start_internal::{{closure}}::hbf4603a1e6e1424d [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 12: 0x56335a49d3e3 - std::panicking::try::do_call::h7642e0de797eeae0 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 13: 0x56335a49f4aa - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 14: 0x56335a49de9d - std::panicking::try::h17f145530f8b5a3f [INFO] [stderr] at src/libstd/panicking.rs:275 [INFO] [stderr] 15: 0x56335a49de9d - std::panic::catch_unwind::hcee1b9b07ea0f9dc [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 16: 0x56335a49de9d - std::rt::lang_start_internal::h82d44298f58b2cfd [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 17: 0x56335a494fd9 - std::rt::lang_start::hfff19cd5f9af01ca [INFO] [stderr] at /rustc/452087b4bf18cece2d52d7cd8c9147195e5404bf/src/libstd/rt.rs:64 [INFO] [stderr] 18: 0x56335a495c6a - main [INFO] [stderr] 19: 0x7f866f3512e1 - __libc_start_main [INFO] [stderr] 20: 0x56335a493cda - _start [INFO] [stderr] 21: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "32a5b282a74b8fed62cacb2062d210da6e553fc7ce342c102f756b5869e81acf"` [INFO] running `"docker" "rm" "-f" "32a5b282a74b8fed62cacb2062d210da6e553fc7ce342c102f756b5869e81acf"` [INFO] [stdout] 32a5b282a74b8fed62cacb2062d210da6e553fc7ce342c102f756b5869e81acf