Dec 19 17:16:36.813 INFO checking erikjohnston/synapse-find-unreferenced-state-groups against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 17:16:36.813 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/erikjohnston/synapse-find-unreferenced-state-groups:/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"`
Dec 19 17:16:37.272 INFO [stdout] 2f76f521f696d010465c6d4e2c243c4e44c2b871d65f63a505418bfac14e8d98
Dec 19 17:16:37.280 INFO running `"docker" "start" "-a" "2f76f521f696d010465c6d4e2c243c4e44c2b871d65f63a505418bfac14e8d98"`
Dec 19 17:16:39.340 INFO [stderr]     Checking postgres-protocol v0.3.2
Dec 19 17:16:39.340 INFO [stderr]     Checking parking_lot v0.6.4
Dec 19 17:16:40.471 INFO [stderr]     Checking console v0.6.2
Dec 19 17:16:41.637 INFO [stderr]     Checking postgres-shared v0.4.2
Dec 19 17:16:42.258 INFO [stderr]     Checking indicatif v0.9.0
Dec 19 17:16:44.214 INFO [stderr]     Checking postgres v0.15.2
Dec 19 17:16:45.573 INFO [stderr]     Checking rust-synapse-find-unreferenced-state-groups v0.1.0 (/opt/crater/workdir)
Dec 19 17:16:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:16:47.185 INFO [stderr]    --> src/main.rs:252:17
Dec 19 17:16:47.185 INFO [stderr]     |
Dec 19 17:16:47.186 INFO [stderr] 252 |                 writeln!(fs, "{}", state_group);
Dec 19 17:16:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:16:47.186 INFO [stderr]     |
Dec 19 17:16:47.187 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:16:47.187 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:16:47.188 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 17:16:47.188 INFO [stderr] 
Dec 19 17:16:47.224 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:16:47.225 INFO [stderr]    --> src/main.rs:252:17
Dec 19 17:16:47.225 INFO [stderr]     |
Dec 19 17:16:47.225 INFO [stderr] 252 |                 writeln!(fs, "{}", state_group);
Dec 19 17:16:47.226 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:16:47.226 INFO [stderr]     |
Dec 19 17:16:47.226 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:16:47.227 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:16:47.227 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 17:16:47.227 INFO [stderr] 
Dec 19 17:16:47.277 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.18s
Dec 19 17:16:48.893 INFO running `"docker" "inspect" "2f76f521f696d010465c6d4e2c243c4e44c2b871d65f63a505418bfac14e8d98"`
Dec 19 17:16:49.180 INFO running `"docker" "rm" "-f" "2f76f521f696d010465c6d4e2c243c4e44c2b871d65f63a505418bfac14e8d98"`
Dec 19 17:16:49.452 INFO [stdout] 2f76f521f696d010465c6d4e2c243c4e44c2b871d65f63a505418bfac14e8d98