[INFO] updating cached repository j3h/rust-koans [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/j3h/rust-koans [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/j3h/rust-koans" "work/ex/beta-1.37-6/sources/1.36.0/gh/j3h/rust-koans"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/j3h/rust-koans'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/j3h/rust-koans" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/j3h/rust-koans"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/j3h/rust-koans'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] cc29866cd11b1e11dd61018baddd0f75fe6c3310 [INFO] sha for GitHub repo j3h/rust-koans: cc29866cd11b1e11dd61018baddd0f75fe6c3310 [INFO] validating manifest of j3h/rust-koans on toolchain 1.36.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of j3h/rust-koans on toolchain beta-2019-07-23 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing j3h/rust-koans [INFO] finished frobbing j3h/rust-koans [INFO] frobbed toml for j3h/rust-koans written to work/ex/beta-1.37-6/sources/1.36.0/gh/j3h/rust-koans/Cargo.toml [INFO] started frobbing j3h/rust-koans [INFO] finished frobbing j3h/rust-koans [INFO] frobbed toml for j3h/rust-koans written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/j3h/rust-koans/Cargo.toml [INFO] crate j3h/rust-koans already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache lock [INFO] [stderr] Blocking waiting for file lock on package cache lock [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing j3h/rust-koans against 1.36.0 for beta-1.37-6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/j3h/rust-koans:/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=warn" "-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" "+1.36.0" "build" "--frozen"` [INFO] [stdout] 9aef9345f10c8a3cdb503881474d476f31656a90d690ecd11b46d9bc306171bc [INFO] running `"docker" "start" "-a" "9aef9345f10c8a3cdb503881474d476f31656a90d690ecd11b46d9bc306171bc"` [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-c1011600eafb19df/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: 0x55c229626683 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55 [INFO] [stderr] at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39 [INFO] [stderr] 1: 0x55c22962232b - std::sys_common::backtrace::_print::h49a82ae9552e35c7 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:71 [INFO] [stderr] 2: 0x55c229625516 - std::panicking::default_hook::{{closure}}::he20974adbefcc046 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] at src/libstd/panicking.rs:197 [INFO] [stderr] 3: 0x55c2296252a9 - std::panicking::default_hook::he4af6af4ac7fef7b [INFO] [stderr] at src/libstd/panicking.rs:211 [INFO] [stderr] 4: 0x55c229625b6f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f [INFO] [stderr] at src/libstd/panicking.rs:474 [INFO] [stderr] 5: 0x55c2296256f1 - std::panicking::continue_panic_fmt::ha6d6ae144369025b [INFO] [stderr] at src/libstd/panicking.rs:381 [INFO] [stderr] 6: 0x55c22962563e - std::panicking::begin_panic_fmt::he54eae869ed71eb1 [INFO] [stderr] at src/libstd/panicking.rs:336 [INFO] [stderr] 7: 0x55c22961bd95 - build_script_build::main::h09ab4e32b4eecfca [INFO] [stderr] at /opt/crater/workdir/build.rs:13 [INFO] [stderr] 8: 0x55c22961b2af - std::rt::lang_start::{{closure}}::hdcdf633ff957f248 [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64 [INFO] [stderr] 9: 0x55c2296255c2 - std::panicking::try::do_call::hc3d8373a0b215f51 [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] at src/libstd/panicking.rs:293 [INFO] [stderr] 10: 0x55c229627769 - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:85 [INFO] [stderr] 11: 0x55c22962607c - std::rt::lang_start_internal::he5218c8b95d395f2 [INFO] [stderr] at src/libstd/panicking.rs:272 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 12: 0x55c22961b288 - std::rt::lang_start::h940e4667583e9d18 [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64 [INFO] [stderr] 13: 0x55c22961c009 - main [INFO] [stderr] 14: 0x7fdf2647c2e0 - __libc_start_main [INFO] [stderr] 15: 0x55c22961a339 - _start [INFO] [stderr] 16: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "9aef9345f10c8a3cdb503881474d476f31656a90d690ecd11b46d9bc306171bc"` [INFO] running `"docker" "rm" "-f" "9aef9345f10c8a3cdb503881474d476f31656a90d690ecd11b46d9bc306171bc"` [INFO] [stdout] 9aef9345f10c8a3cdb503881474d476f31656a90d690ecd11b46d9bc306171bc