[INFO] updating cached repository https://github.com/lwagner94/mycpu
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] d057e3d466e95dea6ce0124997f4d08b01ce4cd5
[INFO] testing lwagner94/mycpu against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Flwagner94%2Fmycpu" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lwagner94/mycpu on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/lwagner94/mycpu
[INFO] finished tweaking git repo https://github.com/lwagner94/mycpu
[INFO] tweaked toml for git repo https://github.com/lwagner94/mycpu written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/lwagner94/mycpu already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] b991daeccc37f63ef75aac63954fde62a3434896d6d09766442769227f2572d9
[INFO] running `"docker" "start" "-a" "b991daeccc37f63ef75aac63954fde62a3434896d6d09766442769227f2572d9"`
[INFO] [stderr]    Compiling mycpu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `mycpu v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mycpu-0098a319cefdaa11/build-script-build` (exit code: 2)
[INFO] [stderr] --- stderr
[INFO] [stderr] Traceback (most recent call last):
[INFO] [stderr]   File "generate_instructions.py", line 45, in <module>
[INFO] [stderr]     with open("src/common/generated/instruction.rs", "w") as f:
[INFO] [stderr] OSError: [Errno 30] Read-only file system: 'src/common/generated/instruction.rs'
[INFO] [stderr] Traceback (most recent call last):
[INFO] [stderr]   File "generate_parser.py", line 41, in <module>
[INFO] [stderr]     with open("src/assembler/generated/matcher.rs", "w") as f:
[INFO] [stderr] OSError: [Errno 30] Read-only file system: 'src/assembler/generated/matcher.rs'
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "b991daeccc37f63ef75aac63954fde62a3434896d6d09766442769227f2572d9"`
[INFO] running `"docker" "rm" "-f" "b991daeccc37f63ef75aac63954fde62a3434896d6d09766442769227f2572d9"`
[INFO] [stdout] b991daeccc37f63ef75aac63954fde62a3434896d6d09766442769227f2572d9