[INFO] updating cached repository matterinc/alpha_line
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matterinc/alpha_line
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matterinc/alpha_line" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/matterinc/alpha_line"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/matterinc/alpha_line'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matterinc/alpha_line" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/matterinc/alpha_line"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/matterinc/alpha_line'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 69374556cfff65b89397db59697802cc04bafb59
[INFO] sha for GitHub repo matterinc/alpha_line: 69374556cfff65b89397db59697802cc04bafb59
[INFO] validating manifest of matterinc/alpha_line 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 matterinc/alpha_line 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 matterinc/alpha_line
[INFO] finished frobbing matterinc/alpha_line
[INFO] frobbed toml for matterinc/alpha_line written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/matterinc/alpha_line/Cargo.toml
[INFO] started frobbing matterinc/alpha_line
[INFO] finished frobbing matterinc/alpha_line
[INFO] frobbed toml for matterinc/alpha_line written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/matterinc/alpha_line/Cargo.toml
[INFO] crate matterinc/alpha_line 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 matterinc/alpha_line against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-2/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/matterinc/alpha_line:/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] 021e21d75f5f98cba6f67b2a998f08de8e0d126ce9b0fa918a8f3d7e7790b005
[INFO] running `"docker" "start" "-a" "021e21d75f5f98cba6f67b2a998f08de8e0d126ce9b0fa918a8f3d7e7790b005"`
[INFO] [stderr] error: failed to load source for a dependency on `ff`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/matterinc/ff#056a13b9
[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" "021e21d75f5f98cba6f67b2a998f08de8e0d126ce9b0fa918a8f3d7e7790b005"`
[INFO] running `"docker" "rm" "-f" "021e21d75f5f98cba6f67b2a998f08de8e0d126ce9b0fa918a8f3d7e7790b005"`
[INFO] [stdout] 021e21d75f5f98cba6f67b2a998f08de8e0d126ce9b0fa918a8f3d7e7790b005