Dec 11 06:14:57.541 INFO checking wezm/serde-duplicate-field against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 06:14:57.541 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 06:14:57.876 INFO [stdout] d39d80301e8cb1b6b1c7fe8376e8e378b13f68ce23fb146916b1143c5da588e7
Dec 11 06:14:57.880 INFO running `"docker" "start" "-a" "d39d80301e8cb1b6b1c7fe8376e8e378b13f68ce23fb146916b1143c5da588e7"`
Dec 11 06:14:58.621 INFO [stderr] usermod: no changes
Dec 11 06:14:58.697 INFO [stderr]     Checking num-traits v0.2.2
Dec 11 06:14:59.971 INFO [stderr]     Checking serde_json v1.0.13
Dec 11 06:15:02.145 INFO [stderr]     Checking serde-duplicate-field v0.1.0 (/source)
Dec 11 06:15:04.568 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.91s
Dec 11 06:15:04.576 INFO [stderr] su: No module specific data is present
Dec 11 06:15:05.402 INFO running `"docker" "inspect" "d39d80301e8cb1b6b1c7fe8376e8e378b13f68ce23fb146916b1143c5da588e7"`
Dec 11 06:15:05.660 INFO running `"docker" "rm" "-f" "d39d80301e8cb1b6b1c7fe8376e8e378b13f68ce23fb146916b1143c5da588e7"`
Dec 11 06:15:05.968 INFO [stdout] d39d80301e8cb1b6b1c7fe8376e8e378b13f68ce23fb146916b1143c5da588e7