Dec 14 19:32:03.236 INFO testing slog-config-0.4.0 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 19:32:03.236 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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 14 19:32:03.603 INFO [stdout] 84fbfd8d6720d680a8c1907b0bf160a5e570e7251930caea34fbb2966da9390c
Dec 14 19:32:03.605 INFO running `"docker" "start" "-a" "84fbfd8d6720d680a8c1907b0bf160a5e570e7251930caea34fbb2966da9390c"`
Dec 14 19:32:04.549 INFO [stderr] usermod: no changes
Dec 14 19:32:04.659 INFO [stderr] warning: Package `toml v0.4.10` does not have feature `serde`. It has a required dependency with that name, but only optional dependencies can be used as features. This is currently a warning to ease the transition, but it will become an error in the future.
Dec 14 19:32:04.687 INFO [stderr]    Compiling toml v0.4.10
Dec 14 19:32:04.687 INFO [stderr]    Compiling slog-json v2.3.0
Dec 14 19:32:09.441 INFO [stderr]    Compiling slog-config v0.4.0 (/source)
Dec 14 19:32:09.491 INFO [stderr] error[E0557]: feature has been removed
Dec 14 19:32:09.491 INFO [stderr]  --> src/lib.rs:6:12
Dec 14 19:32:09.491 INFO [stderr]   |
Dec 14 19:32:09.491 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 14 19:32:09.491 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 14 19:32:09.491 INFO [stderr]   |
Dec 14 19:32:09.491 INFO [stderr] note: subsumed by `#[proc_macro_derive]`
Dec 14 19:32:09.491 INFO [stderr]  --> src/lib.rs:6:12
Dec 14 19:32:09.491 INFO [stderr]   |
Dec 14 19:32:09.491 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 14 19:32:09.491 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 14 19:32:09.491 INFO [stderr] 
Dec 14 19:32:10.701 INFO [stderr] error: aborting due to previous error
Dec 14 19:32:10.701 INFO [stderr] 
Dec 14 19:32:10.701 INFO [stderr] For more information about this error, try `rustc --explain E0557`.
Dec 14 19:32:10.712 INFO [stderr] error: Could not compile `slog-config`.
Dec 14 19:32:10.712 INFO [stderr] 
Dec 14 19:32:10.712 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 19:32:10.714 INFO [stderr] su: No module specific data is present
Dec 14 19:32:10.915 INFO running `"docker" "inspect" "84fbfd8d6720d680a8c1907b0bf160a5e570e7251930caea34fbb2966da9390c"`
Dec 14 19:32:10.978 INFO running `"docker" "rm" "-f" "84fbfd8d6720d680a8c1907b0bf160a5e570e7251930caea34fbb2966da9390c"`
Dec 14 19:32:11.064 INFO [stdout] 84fbfd8d6720d680a8c1907b0bf160a5e570e7251930caea34fbb2966da9390c