[INFO] updating cached repository thara/rust-tcp-echo-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/thara/rust-tcp-echo-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/thara/rust-tcp-echo-server" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/thara/rust-tcp-echo-server"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/thara/rust-tcp-echo-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thara/rust-tcp-echo-server" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/thara/rust-tcp-echo-server"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/thara/rust-tcp-echo-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] daf10149772fc8bde32334ae2327ee6db20c7a86
[INFO] sha for GitHub repo thara/rust-tcp-echo-server: daf10149772fc8bde32334ae2327ee6db20c7a86
[INFO] validating manifest of thara/rust-tcp-echo-server on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of thara/rust-tcp-echo-server on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing thara/rust-tcp-echo-server
[INFO] finished frobbing thara/rust-tcp-echo-server
[INFO] frobbed toml for thara/rust-tcp-echo-server written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/thara/rust-tcp-echo-server/Cargo.toml
[INFO] started frobbing thara/rust-tcp-echo-server
[INFO] finished frobbing thara/rust-tcp-echo-server
[INFO] frobbed toml for thara/rust-tcp-echo-server written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/thara/rust-tcp-echo-server/Cargo.toml
[INFO] crate thara/rust-tcp-echo-server already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking thara/rust-tcp-echo-server against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-6/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/thara/rust-tcp-echo-server:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cbd48ce247c743819eaab098df3cef6a39c5093e357e1e60f1006d7a636cef12
[INFO] running `"docker" "start" "-a" "cbd48ce247c743819eaab098df3cef6a39c5093e357e1e60f1006d7a636cef12"`
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking tcp-echo-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.64s
[INFO] running `"docker" "inspect" "cbd48ce247c743819eaab098df3cef6a39c5093e357e1e60f1006d7a636cef12"`
[INFO] running `"docker" "rm" "-f" "cbd48ce247c743819eaab098df3cef6a39c5093e357e1e60f1006d7a636cef12"`
[INFO] [stdout] cbd48ce247c743819eaab098df3cef6a39c5093e357e1e60f1006d7a636cef12