[INFO] updating cached repository rustyhorde/nailgun
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rustyhorde/nailgun
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rustyhorde/nailgun" "work/ex/beta-1.38-1/sources/1.37.0/gh/rustyhorde/nailgun"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rustyhorde/nailgun'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rustyhorde/nailgun" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustyhorde/nailgun"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustyhorde/nailgun'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4d90d0fbc9f8c0d86f86d17ec962424d94433897
[INFO] sha for GitHub repo rustyhorde/nailgun: 4d90d0fbc9f8c0d86f86d17ec962424d94433897
[INFO] validating manifest of rustyhorde/nailgun on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustyhorde/nailgun on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rustyhorde/nailgun
[INFO] finished frobbing rustyhorde/nailgun
[INFO] frobbed toml for rustyhorde/nailgun written to work/ex/beta-1.38-1/sources/1.37.0/gh/rustyhorde/nailgun/Cargo.toml
[INFO] started frobbing rustyhorde/nailgun
[INFO] finished frobbing rustyhorde/nailgun
[INFO] frobbed toml for rustyhorde/nailgun written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustyhorde/nailgun/Cargo.toml
[INFO] crate rustyhorde/nailgun already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rustyhorde/nailgun against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustyhorde/nailgun:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 7f26f961170d0f1a00dd76cd9e8a40a286c4af59ddaf8bbb54a755b1278e8d07
[INFO] running `"docker" "start" "-a" "7f26f961170d0f1a00dd76cd9e8a40a286c4af59ddaf8bbb54a755b1278e8d07"`
[INFO] [stderr] error: failed to update path override `/opt/crater/workdir/mio` (defined in `/opt/crater/workdir/.cargo/config`)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Could not find Cargo.toml in `/opt/crater/workdir/mio`
[INFO] running `"docker" "inspect" "7f26f961170d0f1a00dd76cd9e8a40a286c4af59ddaf8bbb54a755b1278e8d07"`
[INFO] running `"docker" "rm" "-f" "7f26f961170d0f1a00dd76cd9e8a40a286c4af59ddaf8bbb54a755b1278e8d07"`
[INFO] [stdout] 7f26f961170d0f1a00dd76cd9e8a40a286c4af59ddaf8bbb54a755b1278e8d07