[INFO] updating cached repository BenSchZA/pier
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/BenSchZA/pier
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/BenSchZA/pier" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/BenSchZA/pier"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/BenSchZA/pier'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/BenSchZA/pier" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/BenSchZA/pier"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/BenSchZA/pier'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ca0b4ebe314813fe8b84b748fd84c6707c82c9e2
[INFO] sha for GitHub repo BenSchZA/pier: ca0b4ebe314813fe8b84b748fd84c6707c82c9e2
[INFO] validating manifest of BenSchZA/pier on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of BenSchZA/pier on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing BenSchZA/pier
[INFO] finished frobbing BenSchZA/pier
[INFO] frobbed toml for BenSchZA/pier written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/BenSchZA/pier/Cargo.toml
[INFO] started frobbing BenSchZA/pier
[INFO] finished frobbing BenSchZA/pier
[INFO] frobbed toml for BenSchZA/pier written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/BenSchZA/pier/Cargo.toml
[INFO] crate BenSchZA/pier already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking BenSchZA/pier against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/BenSchZA/pier:/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d1d556ee8151e0d95b5baab677e8d51fea1e49900b442a9b308d55cc354e1338
[INFO] running `"docker" "start" "-a" "d1d556ee8151e0d95b5baab677e8d51fea1e49900b442a9b308d55cc354e1338"`
[INFO] [stderr] error: failed to load source for a dependency on `shell`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/google/rust-shell#8b1e775b
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to open: /opt/crater/cargo-home/git/.cargo-lock-git
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `"docker" "inspect" "d1d556ee8151e0d95b5baab677e8d51fea1e49900b442a9b308d55cc354e1338"`
[INFO] running `"docker" "rm" "-f" "d1d556ee8151e0d95b5baab677e8d51fea1e49900b442a9b308d55cc354e1338"`
[INFO] [stdout] d1d556ee8151e0d95b5baab677e8d51fea1e49900b442a9b308d55cc354e1338