[INFO] updating cached repository https://github.com/BurntSushi/rust-docs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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] 28852fea71fc24a0d53cc2573b255bf677597ac8
[INFO] checking BurntSushi/rust-docs against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-docs" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BurntSushi/rust-docs on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/BurntSushi/rust-docs
[INFO] finished tweaking git repo https://github.com/BurntSushi/rust-docs
[INFO] tweaked toml for git repo https://github.com/BurntSushi/rust-docs written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/BurntSushi/rust-docs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/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=forbid" "-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" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7101f2dd4f465e0cec63491af91427e270a93cb3da2730290da2fe09b8aee8f2
[INFO] running `"docker" "start" "-a" "7101f2dd4f465e0cec63491af91427e270a93cb3da2730290da2fe09b8aee8f2"`
[INFO] [stderr]    Compiling ryu v1.0.1
[INFO] [stderr]     Checking suffix v1.1.0
[INFO] [stderr]     Checking cbor v0.4.1
[INFO] [stderr]     Checking fst v0.3.5
[INFO] [stderr]     Checking streaming-stats v0.2.2
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking chan-signal v0.3.3
[INFO] [stderr]     Checking quickcheck v0.9.0
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking docs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.20s
[INFO] running `"docker" "inspect" "7101f2dd4f465e0cec63491af91427e270a93cb3da2730290da2fe09b8aee8f2"`
[INFO] running `"docker" "rm" "-f" "7101f2dd4f465e0cec63491af91427e270a93cb3da2730290da2fe09b8aee8f2"`
[INFO] [stdout] 7101f2dd4f465e0cec63491af91427e270a93cb3da2730290da2fe09b8aee8f2