Dec 19 12:55:24.007 INFO checking mawis/try-future against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:55:24.007 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:55:24.231 INFO [stdout] 6c438dd6176f2ff3ca91c0ded10fbb2a76974314d569fd7f4129ea022efdee72
Dec 19 12:55:24.236 INFO running `"docker" "start" "-a" "6c438dd6176f2ff3ca91c0ded10fbb2a76974314d569fd7f4129ea022efdee72"`
Dec 19 12:55:24.876 INFO [stderr]     Checking bytes v0.4.5
Dec 19 12:55:25.586 INFO [stderr]     Checking tokio-io v0.1.4
Dec 19 12:55:26.253 INFO [stderr]     Checking tokio-core v0.1.10
Dec 19 12:55:27.148 INFO [stderr]     Checking try-future v0.1.0 (/opt/crater/workdir)
Dec 19 12:55:27.392 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.56s
Dec 19 12:55:28.147 INFO running `"docker" "inspect" "6c438dd6176f2ff3ca91c0ded10fbb2a76974314d569fd7f4129ea022efdee72"`
Dec 19 12:55:28.422 INFO running `"docker" "rm" "-f" "6c438dd6176f2ff3ca91c0ded10fbb2a76974314d569fd7f4129ea022efdee72"`
Dec 19 12:55:28.740 INFO [stdout] 6c438dd6176f2ff3ca91c0ded10fbb2a76974314d569fd7f4129ea022efdee72