[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-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/bitcartel/rust-koans-solutions"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/bitcartel/rust-koans-solutions'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/bitcartel/rust-koans-solutions" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/bitcartel/rust-koans-solutions"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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#c43d03a19f326f4a323569328cc501e86eb6d22e [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of bitcartel/rust-koans-solutions on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-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-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/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-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking bitcartel/rust-koans-solutions against try#75eff020d0923c035c2fe220db4a0465cd847048 for pr-63565 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-4/try#75eff020d0923c035c2fe220db4a0465cd847048:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 55a277fddf905961e3a5b675abf43b5a45eec4f3b70073a2cc3b072d0e45b779 [INFO] running `"docker" "start" "-a" "55a277fddf905961e3a5b675abf43b5a45eec4f3b70073a2cc3b072d0e45b779"` [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-713b88ae750c92c9/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: 0x559a8faa32db - backtrace::backtrace::libunwind::trace::h223ecf9e25ea61ed [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x559a8faa32db - backtrace::backtrace::trace_unsynchronized::h19c402a6233e597e [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x559a8faa32db - std::sys_common::backtrace::_print::h14947081e8315ba5 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x559a8faa32db - std::sys_common::backtrace::print::h87cad3f0b50b59c5 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x559a8faa32db - std::panicking::default_hook::{{closure}}::h497a714df189bd9d [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x559a8faa2fb6 - std::panicking::default_hook::h8dc4a117b759bd96 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x559a8faa399d - std::panicking::rust_panic_with_hook::h4cbf0f096b75f262 [INFO] [stderr] at src/libstd/panicking.rs:477 [INFO] [stderr] 7: 0x559a8faa3522 - std::panicking::continue_panic_fmt::hbfbfc57925685348 [INFO] [stderr] at src/libstd/panicking.rs:384 [INFO] [stderr] 8: 0x559a8faa346f - std::panicking::begin_panic_fmt::h01a8d43d7dd3d271 [INFO] [stderr] at src/libstd/panicking.rs:339 [INFO] [stderr] 9: 0x559a8fa9ba76 - build_script_build::main::h3b003427cac08481 [INFO] [stderr] at /opt/crater/workdir/build.rs:13 [INFO] [stderr] 10: 0x559a8fa9aff0 - std::rt::lang_start::{{closure}}::he3ae8faa7207d836 [INFO] [stderr] at /rustc/75eff020d0923c035c2fe220db4a0465cd847048/src/libstd/rt.rs:64 [INFO] [stderr] 11: 0x559a8faa33f3 - std::rt::lang_start_internal::{{closure}}::hb2a68345cd4d50f8 [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 12: 0x559a8faa33f3 - std::panicking::try::do_call::ha4d88255f4a68d08 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 13: 0x559a8faa54ba - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 14: 0x559a8faa3ead - std::panicking::try::h6debac9988c5415d [INFO] [stderr] at src/libstd/panicking.rs:275 [INFO] [stderr] 15: 0x559a8faa3ead - std::panic::catch_unwind::h4659dbf6316a9c8d [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 16: 0x559a8faa3ead - std::rt::lang_start_internal::hdadab8536edf34fe [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 17: 0x559a8fa9afc9 - std::rt::lang_start::hee348b39cef883f8 [INFO] [stderr] at /rustc/75eff020d0923c035c2fe220db4a0465cd847048/src/libstd/rt.rs:64 [INFO] [stderr] 18: 0x559a8fa9bc5a - main [INFO] [stderr] 19: 0x7f9d262db2e1 - __libc_start_main [INFO] [stderr] 20: 0x559a8fa99cda - _start [INFO] [stderr] 21: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "55a277fddf905961e3a5b675abf43b5a45eec4f3b70073a2cc3b072d0e45b779"` [INFO] running `"docker" "rm" "-f" "55a277fddf905961e3a5b675abf43b5a45eec4f3b70073a2cc3b072d0e45b779"` [INFO] [stdout] 55a277fddf905961e3a5b675abf43b5a45eec4f3b70073a2cc3b072d0e45b779