[INFO] crate slog-config 0.4.0 is already in cache
[INFO] extracting crate slog-config 0.4.0 into work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/slog-config/0.4.0
[INFO] extracting crate slog-config 0.4.0 into work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/slog-config/0.4.0
[INFO] validating manifest of slog-config-0.4.0 on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of slog-config-0.4.0 on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing slog-config-0.4.0
[INFO] finished frobbing slog-config-0.4.0
[INFO] frobbed toml for slog-config-0.4.0 written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/slog-config/0.4.0/Cargo.toml
[INFO] started frobbing slog-config-0.4.0
[INFO] finished frobbing slog-config-0.4.0
[INFO] frobbed toml for slog-config-0.4.0 written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/slog-config/0.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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.
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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.
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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.
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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.
[INFO] checking slog-config-0.4.0 against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6976cce63857bcab1c2aee42cfb4f10dccf64d353406c41c82425dd2f58ce619
[INFO] running `"docker" "start" "-a" "6976cce63857bcab1c2aee42cfb4f10dccf64d353406c41c82425dd2f58ce619"`
[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.
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking slog-json v2.3.0
[INFO] [stderr]     Checking slog-config v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(custom_derive)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: subsumed by `#[proc_macro_derive]`
[INFO] [stderr]  --> src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(custom_derive)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(custom_derive)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: subsumed by `#[proc_macro_derive]`
[INFO] [stderr]  --> src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(custom_derive)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: Could not compile `slog-config`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Could not compile `slog-config`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6976cce63857bcab1c2aee42cfb4f10dccf64d353406c41c82425dd2f58ce619"`
[INFO] running `"docker" "rm" "-f" "6976cce63857bcab1c2aee42cfb4f10dccf64d353406c41c82425dd2f58ce619"`
[INFO] [stdout] 6976cce63857bcab1c2aee42cfb4f10dccf64d353406c41c82425dd2f58ce619