Dec 19 11:44:11.813 INFO checking nnarain/silica against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 11:44:11.813 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/nnarain/silica:/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 11:44:12.428 INFO [stdout] 3c327fa202a62906e8b274789c334af2903c4b68a6cd320086e2621d9b7962e3
Dec 19 11:44:12.430 INFO running `"docker" "start" "-a" "3c327fa202a62906e8b274789c334af2903c4b68a6cd320086e2621d9b7962e3"`
Dec 19 11:44:14.184 INFO [stderr]     Checking nom v3.2.0
Dec 19 11:44:14.184 INFO [stderr]    Compiling serde_derive v1.0.11
Dec 19 11:44:21.304 INFO [stderr]     Checking docopt v0.8.1
Dec 19 11:44:22.569 INFO [stderr]     Checking silica v0.1.0 (/opt/crater/workdir)
Dec 19 11:44:25.529 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.41s
Dec 19 11:44:26.208 INFO running `"docker" "inspect" "3c327fa202a62906e8b274789c334af2903c4b68a6cd320086e2621d9b7962e3"`
Dec 19 11:44:26.422 INFO running `"docker" "rm" "-f" "3c327fa202a62906e8b274789c334af2903c4b68a6cd320086e2621d9b7962e3"`
Dec 19 11:44:26.777 INFO [stdout] 3c327fa202a62906e8b274789c334af2903c4b68a6cd320086e2621d9b7962e3