[INFO] updating cached repository iddar/rust_experiments
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iddar/rust_experiments
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iddar/rust_experiments" "work/ex/pr-60620/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/iddar/rust_experiments"`
[INFO] [stderr] Cloning into 'work/ex/pr-60620/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/iddar/rust_experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iddar/rust_experiments" "work/ex/pr-60620/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/iddar/rust_experiments"`
[INFO] [stderr] Cloning into 'work/ex/pr-60620/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/iddar/rust_experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9db2d7a8ebfb63d08ed4ae99b3143a7241b82265
[INFO] sha for GitHub repo iddar/rust_experiments: 9db2d7a8ebfb63d08ed4ae99b3143a7241b82265
[INFO] validating manifest of iddar/rust_experiments on toolchain master#ef01f29964df207f181bd5bcf236e41372a17273
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+ef01f29964df207f181bd5bcf236e41372a17273-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iddar/rust_experiments on toolchain try#a7cff45e655f886da150e206c7acbe984df4ab71
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a7cff45e655f886da150e206c7acbe984df4ab71-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing iddar/rust_experiments
[INFO] finished frobbing iddar/rust_experiments
[INFO] frobbed toml for iddar/rust_experiments written to work/ex/pr-60620/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/iddar/rust_experiments/Cargo.toml
[INFO] started frobbing iddar/rust_experiments
[INFO] finished frobbing iddar/rust_experiments
[INFO] frobbed toml for iddar/rust_experiments written to work/ex/pr-60620/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/iddar/rust_experiments/Cargo.toml
[INFO] crate iddar/rust_experiments already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+ef01f29964df207f181bd5bcf236e41372a17273-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a7cff45e655f886da150e206c7acbe984df4ab71-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking iddar/rust_experiments against try#a7cff45e655f886da150e206c7acbe984df4ab71 for pr-60620
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60620/worker-0/try#a7cff45e655f886da150e206c7acbe984df4ab71:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60620/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/iddar/rust_experiments:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a7cff45e655f886da150e206c7acbe984df4ab71-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5269dc101b2d6802fc6bdacd72fb9b53a436760b4949ce194ad2eda6b99b2f2d
[INFO] running `"docker" "start" "-a" "5269dc101b2d6802fc6bdacd72fb9b53a436760b4949ce194ad2eda6b99b2f2d"`
[INFO] [stderr] error: failed to acquire package cache lock
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to open: /opt/crater/cargo-home/.package-cache
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `"docker" "inspect" "5269dc101b2d6802fc6bdacd72fb9b53a436760b4949ce194ad2eda6b99b2f2d"`
[INFO] running `"docker" "rm" "-f" "5269dc101b2d6802fc6bdacd72fb9b53a436760b4949ce194ad2eda6b99b2f2d"`
[INFO] [stdout] 5269dc101b2d6802fc6bdacd72fb9b53a436760b4949ce194ad2eda6b99b2f2d