Dec 19 12:34:46.133 INFO checking mitsuhiko/rust-execution-context against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:34:46.133 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mitsuhiko/rust-execution-context:/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 12:34:46.564 INFO [stdout] 8352849d3a97a4f1096560047af4ff94aabb502648870abd9c96d1eed1a70e4f
Dec 19 12:34:46.570 INFO running `"docker" "start" "-a" "8352849d3a97a4f1096560047af4ff94aabb502648870abd9c96d1eed1a70e4f"`
Dec 19 12:34:47.583 INFO [stderr]    Compiling rustc_version v0.2.2
Dec 19 12:34:48.541 INFO [stderr]    Compiling im v10.2.0
Dec 19 12:34:51.339 INFO [stderr]     Checking execution-context v0.1.0 (/opt/crater/workdir)
Dec 19 12:34:51.889 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.33s
Dec 19 12:34:52.201 INFO running `"docker" "inspect" "8352849d3a97a4f1096560047af4ff94aabb502648870abd9c96d1eed1a70e4f"`
Dec 19 12:34:52.413 INFO running `"docker" "rm" "-f" "8352849d3a97a4f1096560047af4ff94aabb502648870abd9c96d1eed1a70e4f"`
Dec 19 12:34:52.635 INFO [stdout] 8352849d3a97a4f1096560047af4ff94aabb502648870abd9c96d1eed1a70e4f