Dec 19 12:55:24.152 INFO checking mawis/try-future against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:55:24.152 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mawis/try-future:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:55:24.370 INFO [stdout] 0aa400c7bf697306f86dc7c1a1f5b8059245ffc91a7eaeb33d8b63cea7e2661e
Dec 19 12:55:24.373 INFO running `"docker" "start" "-a" "0aa400c7bf697306f86dc7c1a1f5b8059245ffc91a7eaeb33d8b63cea7e2661e"`
Dec 19 12:55:25.099 INFO [stderr]     Checking bytes v0.4.5
Dec 19 12:55:25.803 INFO [stderr]     Checking tokio-io v0.1.4
Dec 19 12:55:26.513 INFO [stderr]     Checking tokio-core v0.1.10
Dec 19 12:55:27.392 INFO [stderr]     Checking try-future v0.1.0 (/opt/crater/workdir)
Dec 19 12:55:27.852 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.82s
Dec 19 12:55:28.470 INFO running `"docker" "inspect" "0aa400c7bf697306f86dc7c1a1f5b8059245ffc91a7eaeb33d8b63cea7e2661e"`
Dec 19 12:55:28.742 INFO running `"docker" "rm" "-f" "0aa400c7bf697306f86dc7c1a1f5b8059245ffc91a7eaeb33d8b63cea7e2661e"`
Dec 19 12:55:29.008 INFO [stdout] 0aa400c7bf697306f86dc7c1a1f5b8059245ffc91a7eaeb33d8b63cea7e2661e