Dec 18 11:08:29.757 INFO checking slog-config-0.4.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 11:08:29.757 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/slog-config/0.4.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 11:08:30.287 INFO [stdout] af4b11773a2c1a6a5f7a452c23c95d94f770b1415f63fc6b9359f85f58575b73
Dec 18 11:08:30.292 INFO running `"docker" "start" "-a" "af4b11773a2c1a6a5f7a452c23c95d94f770b1415f63fc6b9359f85f58575b73"`
Dec 18 11:08:31.832 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 18 11:08:31.864 INFO [stderr]     Checking toml v0.4.10
Dec 18 11:08:31.864 INFO [stderr]     Checking slog-term v2.4.0
Dec 18 11:08:31.864 INFO [stderr]     Checking slog-json v2.3.0
Dec 18 11:08:35.103 INFO [stderr]     Checking slog-config v0.4.0 (/opt/crater/workdir)
Dec 18 11:08:35.404 INFO [stderr] error[E0557]: feature has been removed
Dec 18 11:08:35.405 INFO [stderr]  --> src/lib.rs:6:12
Dec 18 11:08:35.405 INFO [stderr]   |
Dec 18 11:08:35.405 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 18 11:08:35.406 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 18 11:08:35.407 INFO [stderr]   |
Dec 18 11:08:35.407 INFO [stderr] note: subsumed by `#[proc_macro_derive]`
Dec 18 11:08:35.407 INFO [stderr]  --> src/lib.rs:6:12
Dec 18 11:08:35.407 INFO [stderr]   |
Dec 18 11:08:35.408 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 18 11:08:35.408 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 18 11:08:35.408 INFO [stderr] 
Dec 18 11:08:35.432 INFO [stderr] error[E0557]: feature has been removed
Dec 18 11:08:35.433 INFO [stderr]  --> src/lib.rs:6:12
Dec 18 11:08:35.433 INFO [stderr]   |
Dec 18 11:08:35.433 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 18 11:08:35.433 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 18 11:08:35.434 INFO [stderr]   |
Dec 18 11:08:35.434 INFO [stderr] note: subsumed by `#[proc_macro_derive]`
Dec 18 11:08:35.434 INFO [stderr]  --> src/lib.rs:6:12
Dec 18 11:08:35.434 INFO [stderr]   |
Dec 18 11:08:35.435 INFO [stderr] 6 | #![feature(custom_derive)]
Dec 18 11:08:35.435 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 18 11:08:35.435 INFO [stderr] 
Dec 18 11:08:36.124 INFO [stderr] error: aborting due to previous error
Dec 18 11:08:36.124 INFO [stderr] 
Dec 18 11:08:36.124 INFO [stderr] For more information about this error, try `rustc --explain E0557`.
Dec 18 11:08:36.147 INFO [stderr] error: Could not compile `slog-config`.
Dec 18 11:08:36.147 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 11:08:36.204 INFO [stderr] error: aborting due to previous error
Dec 18 11:08:36.204 INFO [stderr] 
Dec 18 11:08:36.204 INFO [stderr] For more information about this error, try `rustc --explain E0557`.
Dec 18 11:08:36.213 INFO [stderr] error: Could not compile `slog-config`.
Dec 18 11:08:36.213 INFO [stderr] 
Dec 18 11:08:36.213 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 11:08:37.104 INFO running `"docker" "inspect" "af4b11773a2c1a6a5f7a452c23c95d94f770b1415f63fc6b9359f85f58575b73"`
Dec 18 11:08:37.368 INFO running `"docker" "rm" "-f" "af4b11773a2c1a6a5f7a452c23c95d94f770b1415f63fc6b9359f85f58575b73"`
Dec 18 11:08:37.724 INFO [stdout] af4b11773a2c1a6a5f7a452c23c95d94f770b1415f63fc6b9359f85f58575b73