Dec 19 10:37:09.101 INFO checking qingxiang-jia/learn-rust against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:37:09.101 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/qingxiang-jia/learn-rust:/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 10:37:09.599 INFO [stdout] a2afb841ef23cbb2e5ed21600e26a4897783bd22b8b79c029aff8ababc88d8f3
Dec 19 10:37:09.629 INFO running `"docker" "start" "-a" "a2afb841ef23cbb2e5ed21600e26a4897783bd22b8b79c029aff8ababc88d8f3"`
Dec 19 10:37:11.192 INFO [stderr]     Checking serde_json v1.0.13
Dec 19 10:37:13.658 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 19 10:37:14.387 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.26s
Dec 19 10:37:16.105 INFO running `"docker" "inspect" "a2afb841ef23cbb2e5ed21600e26a4897783bd22b8b79c029aff8ababc88d8f3"`
Dec 19 10:37:16.358 INFO running `"docker" "rm" "-f" "a2afb841ef23cbb2e5ed21600e26a4897783bd22b8b79c029aff8ababc88d8f3"`
Dec 19 10:37:16.704 INFO [stdout] a2afb841ef23cbb2e5ed21600e26a4897783bd22b8b79c029aff8ababc88d8f3