[INFO] updating cached repository sebastianblunt/cargo-6999
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sebastianblunt/cargo-6999
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sebastianblunt/cargo-6999" "work/ex/beta-1.38-1/sources/1.37.0/gh/sebastianblunt/cargo-6999"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sebastianblunt/cargo-6999'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sebastianblunt/cargo-6999" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sebastianblunt/cargo-6999"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sebastianblunt/cargo-6999'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ff3ec8066738b9f35c9c2d0a8498a0badac456f1
[INFO] sha for GitHub repo sebastianblunt/cargo-6999: ff3ec8066738b9f35c9c2d0a8498a0badac456f1
[INFO] validating manifest of sebastianblunt/cargo-6999 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 sebastianblunt/cargo-6999 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 sebastianblunt/cargo-6999
[INFO] finished frobbing sebastianblunt/cargo-6999
[INFO] frobbed toml for sebastianblunt/cargo-6999 written to work/ex/beta-1.38-1/sources/1.37.0/gh/sebastianblunt/cargo-6999/Cargo.toml
[INFO] started frobbing sebastianblunt/cargo-6999
[INFO] finished frobbing sebastianblunt/cargo-6999
[INFO] frobbed toml for sebastianblunt/cargo-6999 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sebastianblunt/cargo-6999/Cargo.toml
[INFO] crate sebastianblunt/cargo-6999 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] [stderr]    Unpacking stable_deref_trait v1.1.1 (registry `/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sebastianblunt/cargo-6999/vendor`)
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]    Unpacking stable_deref_trait v1.1.1 (registry `/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sebastianblunt/cargo-6999/vendor`)
[INFO] testing sebastianblunt/cargo-6999 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sebastianblunt/cargo-6999:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 796f478cc681ff3e9ce520b3abfb56910950580e79a487a86be21dc905ace91b
[INFO] running `"docker" "start" "-a" "796f478cc681ff3e9ce520b3abfb56910950580e79a487a86be21dc905ace91b"`
[INFO] [stderr]    Unpacking stable_deref_trait v1.1.1 (registry `/opt/crater/workdir/vendor`)
[INFO] [stderr] error: failed to download `stable_deref_trait v1.1.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to download replaced source registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack package `stable_deref_trait v1.1.1 (registry `/opt/crater/workdir/vendor`)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `"docker" "inspect" "796f478cc681ff3e9ce520b3abfb56910950580e79a487a86be21dc905ace91b"`
[INFO] running `"docker" "rm" "-f" "796f478cc681ff3e9ce520b3abfb56910950580e79a487a86be21dc905ace91b"`
[INFO] [stdout] 796f478cc681ff3e9ce520b3abfb56910950580e79a487a86be21dc905ace91b