[INFO] updating cached repository MOZGIII/musicbot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MOZGIII/musicbot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MOZGIII/musicbot" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/MOZGIII/musicbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/MOZGIII/musicbot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MOZGIII/musicbot" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/MOZGIII/musicbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/MOZGIII/musicbot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ca6c1c2a17e59aa6ccae349fa1d2a6707a7d077c
[INFO] sha for GitHub repo MOZGIII/musicbot: ca6c1c2a17e59aa6ccae349fa1d2a6707a7d077c
[INFO] validating manifest of MOZGIII/musicbot 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 MOZGIII/musicbot 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 MOZGIII/musicbot
[INFO] finished frobbing MOZGIII/musicbot
[INFO] frobbed toml for MOZGIII/musicbot written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/MOZGIII/musicbot/Cargo.toml
[INFO] started frobbing MOZGIII/musicbot
[INFO] finished frobbing MOZGIII/musicbot
[INFO] frobbed toml for MOZGIII/musicbot written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/MOZGIII/musicbot/Cargo.toml
[INFO] crate MOZGIII/musicbot 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 MOZGIII/musicbot against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-4/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/MOZGIII/musicbot:/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] a170ab827bd1898ee0908bdd39756e4ed8eb0d3b003ac700517ae49e3f51e8b3
[INFO] running `"docker" "start" "-a" "a170ab827bd1898ee0908bdd39756e4ed8eb0d3b003ac700517ae49e3f51e8b3"`
[INFO] [stderr] error: failed to load source for a dependency on `serenity`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/serenity-rs/serenity.git?rev=745ae32b63603d4ee64c9b2393a447726b89350b#745ae32b
[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" "a170ab827bd1898ee0908bdd39756e4ed8eb0d3b003ac700517ae49e3f51e8b3"`
[INFO] running `"docker" "rm" "-f" "a170ab827bd1898ee0908bdd39756e4ed8eb0d3b003ac700517ae49e3f51e8b3"`
[INFO] [stdout] a170ab827bd1898ee0908bdd39756e4ed8eb0d3b003ac700517ae49e3f51e8b3