Oct 12 10:48:46.322 INFO checking wezm/serde-duplicate-field against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 10:48:46.322 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 12 10:48:46.467 INFO blam! de8552193c24c5f9b96dc89995c69eac720234f0389ac7a313dc926208bb497d
Oct 12 10:48:46.469 INFO running `"docker" "start" "-a" "de8552193c24c5f9b96dc89995c69eac720234f0389ac7a313dc926208bb497d"`
Oct 12 10:48:46.968 INFO kablam! usermod: no changes
Oct 12 10:48:47.060 INFO kablam!     Checking serde v1.0.36
Oct 12 10:48:47.060 INFO kablam!    Compiling syn v0.12.15
Oct 12 10:48:59.440 INFO kablam!    Compiling serde_derive_internals v0.22.2
Oct 12 10:49:04.672 INFO kablam!    Compiling serde_derive v1.0.36
Oct 12 10:49:08.540 INFO kablam!     Checking serde_json v1.0.13
Oct 12 10:49:15.512 INFO kablam!     Checking serde-duplicate-field v0.1.0 (/source)
Oct 12 10:49:18.012 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 31.00s
Oct 12 10:49:18.018 INFO kablam! su: No module specific data is present
Oct 12 10:49:18.659 INFO running `"docker" "rm" "-f" "de8552193c24c5f9b96dc89995c69eac720234f0389ac7a313dc926208bb497d"`
Oct 12 10:49:18.912 INFO blam! de8552193c24c5f9b96dc89995c69eac720234f0389ac7a313dc926208bb497d