Dec 02 16:32:16.256 INFO testing slog-config-0.4.0 against 1.30.1 for beta-1.31-5
Dec 02 16:32:16.256 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-4/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/beta-1.31-5/1.30.1:/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 +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 16:32:16.751 INFO [stdout] 1768b566a39056a6115dfc9161402a0588a004d768dcb2b10ad09d4ee90239ef
Dec 02 16:32:16.756 INFO running `"docker" "start" "-a" "1768b566a39056a6115dfc9161402a0588a004d768dcb2b10ad09d4ee90239ef"`
Dec 02 16:32:17.546 INFO [stderr] usermod: no changes
Dec 02 16:32:17.678 INFO [stderr] warning: Package `toml v0.4.9` 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 02 16:32:17.727 INFO [stderr]    Compiling toml v0.4.9
Dec 02 16:32:17.727 INFO [stderr]    Compiling slog-json v2.2.0
Dec 02 16:32:22.230 INFO [stderr]    Compiling slog-config v0.4.0 (/source)
Dec 02 16:32:23.859 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 16:32:23.859 INFO [stderr]  --> src/lib.rs:6:1
Dec 02 16:32:23.859 INFO [stderr]   |
Dec 02 16:32:23.859 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 02 16:32:23.859 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 16:32:23.859 INFO [stderr] 
Dec 02 16:32:23.859 INFO [stderr] error: aborting due to previous error
Dec 02 16:32:23.859 INFO [stderr] 
Dec 02 16:32:23.859 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 16:32:23.875 INFO [stderr] error: Could not compile `slog-config`.
Dec 02 16:32:23.875 INFO [stderr] 
Dec 02 16:32:23.875 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 16:32:23.877 INFO [stderr] su: No module specific data is present
Dec 02 16:32:24.888 INFO running `"docker" "inspect" "1768b566a39056a6115dfc9161402a0588a004d768dcb2b10ad09d4ee90239ef"`
Dec 02 16:32:25.195 INFO running `"docker" "rm" "-f" "1768b566a39056a6115dfc9161402a0588a004d768dcb2b10ad09d4ee90239ef"`
Dec 02 16:32:25.650 INFO [stdout] 1768b566a39056a6115dfc9161402a0588a004d768dcb2b10ad09d4ee90239ef