Dec 19 16:04:30.702 INFO checking hjr3/future-mpsc-example against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 16:04:30.702 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/hjr3/future-mpsc-example:/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 16:04:30.945 INFO [stdout] cca7976c8fdf35e44d9797a0587b2da772f7890615096b8e1537d8c56d300ce2
Dec 19 16:04:30.946 INFO running `"docker" "start" "-a" "cca7976c8fdf35e44d9797a0587b2da772f7890615096b8e1537d8c56d300ce2"`
Dec 19 16:04:31.685 INFO [stderr]     Checking net2 v0.2.26
Dec 19 16:04:31.688 INFO [stderr]     Checking env_logger v0.4.1
Dec 19 16:04:32.115 INFO [stderr]     Checking mio v0.6.4
Dec 19 16:04:33.126 INFO [stderr]     Checking tokio-core v0.1.4
Dec 19 16:04:33.898 INFO [stderr]     Checking future-mpsc-example v0.1.0 (/opt/crater/workdir)
Dec 19 16:04:34.288 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.65s
Dec 19 16:04:34.536 INFO running `"docker" "inspect" "cca7976c8fdf35e44d9797a0587b2da772f7890615096b8e1537d8c56d300ce2"`
Dec 19 16:04:34.666 INFO running `"docker" "rm" "-f" "cca7976c8fdf35e44d9797a0587b2da772f7890615096b8e1537d8c56d300ce2"`
Dec 19 16:04:34.779 INFO [stdout] cca7976c8fdf35e44d9797a0587b2da772f7890615096b8e1537d8c56d300ce2