[INFO] updating cached repository nabeen/socket-programming
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nabeen/socket-programming
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nabeen/socket-programming" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nabeen/socket-programming"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nabeen/socket-programming'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nabeen/socket-programming" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nabeen/socket-programming"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nabeen/socket-programming'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] be8303bdcd702daf6c1895d012b72d0d9c7b4477
[INFO] sha for GitHub repo nabeen/socket-programming: be8303bdcd702daf6c1895d012b72d0d9c7b4477
[INFO] validating manifest of nabeen/socket-programming on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nabeen/socket-programming on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nabeen/socket-programming
[INFO] finished frobbing nabeen/socket-programming
[INFO] frobbed toml for nabeen/socket-programming written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nabeen/socket-programming/Cargo.toml
[INFO] started frobbing nabeen/socket-programming
[INFO] finished frobbing nabeen/socket-programming
[INFO] frobbed toml for nabeen/socket-programming written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nabeen/socket-programming/Cargo.toml
[INFO] crate nabeen/socket-programming already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nabeen/socket-programming against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-3/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nabeen/socket-programming:/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 611a7a1cfd158c57f45aa3a44a6e3f36102e635d119b3ab67ba4b745746ed1fb
[INFO] running `"docker" "start" "-a" "611a7a1cfd158c57f45aa3a44a6e3f36102e635d119b3ab67ba4b745746ed1fb"`
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking socket-programming v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `"docker" "inspect" "611a7a1cfd158c57f45aa3a44a6e3f36102e635d119b3ab67ba4b745746ed1fb"`
[INFO] running `"docker" "rm" "-f" "611a7a1cfd158c57f45aa3a44a6e3f36102e635d119b3ab67ba4b745746ed1fb"`
[INFO] [stdout] 611a7a1cfd158c57f45aa3a44a6e3f36102e635d119b3ab67ba4b745746ed1fb