Dec 12 06:39:08.481 INFO checking syn-error-experiment-0.0.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 06:39:08.481 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 12 06:39:08.808 INFO [stdout] c6874ad0afce35f4b185ea0cb81c393c2b500e848bff42f1fdf3c861bb758ec8
Dec 12 06:39:08.810 INFO running `"docker" "start" "-a" "c6874ad0afce35f4b185ea0cb81c393c2b500e848bff42f1fdf3c861bb758ec8"`
Dec 12 06:39:09.658 INFO [stderr] usermod: no changes
Dec 12 06:39:09.800 INFO [stderr]    Compiling proc-macro2 v0.4.24
Dec 12 06:39:12.088 INFO [stderr]     Checking quote v0.6.10
Dec 12 06:39:12.712 INFO [stderr]     Checking syn v0.14.9
Dec 12 06:39:13.987 INFO [stderr]     Checking syn-error-experiment v0.0.0 (/source)
Dec 12 06:39:15.708 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
Dec 12 06:39:15.708 INFO [stderr] su: No module specific data is present
Dec 12 06:39:16.055 INFO running `"docker" "inspect" "c6874ad0afce35f4b185ea0cb81c393c2b500e848bff42f1fdf3c861bb758ec8"`
Dec 12 06:39:16.234 INFO running `"docker" "rm" "-f" "c6874ad0afce35f4b185ea0cb81c393c2b500e848bff42f1fdf3c861bb758ec8"`
Dec 12 06:39:16.556 INFO [stdout] c6874ad0afce35f4b185ea0cb81c393c2b500e848bff42f1fdf3c861bb758ec8