Dec 19 15:02:52.797 INFO checking joelparkerhenderson/demo_rust_code against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 15:02:52.797 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/joelparkerhenderson/demo_rust_code:/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 15:02:53.202 INFO [stdout] 04f74a3921fd576e044f0893e5fae38dae06771f51792840958d5c724ace8d65
Dec 19 15:02:53.212 INFO running `"docker" "start" "-a" "04f74a3921fd576e044f0893e5fae38dae06771f51792840958d5c724ace8d65"`
Dec 19 15:02:54.860 INFO [stderr]     Checking backtrace-sys v0.1.16
Dec 19 15:02:55.116 INFO [stderr]     Checking backtrace v0.3.3
Dec 19 15:02:55.578 INFO [stderr]     Checking error-chain v0.11.0
Dec 19 15:02:56.092 INFO [stderr]     Checking demo-rust-code v1.0.0 (/opt/crater/workdir)
Dec 19 15:02:57.008 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
Dec 19 15:02:57.721 INFO running `"docker" "inspect" "04f74a3921fd576e044f0893e5fae38dae06771f51792840958d5c724ace8d65"`
Dec 19 15:02:58.016 INFO running `"docker" "rm" "-f" "04f74a3921fd576e044f0893e5fae38dae06771f51792840958d5c724ace8d65"`
Dec 19 15:02:58.362 INFO [stdout] 04f74a3921fd576e044f0893e5fae38dae06771f51792840958d5c724ace8d65