[INFO] updating cached repository erikjohnston/synapse-find-unreferenced-state-groups
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/erikjohnston/synapse-find-unreferenced-state-groups
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/erikjohnston/synapse-find-unreferenced-state-groups" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/erikjohnston/synapse-find-unreferenced-state-groups'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/erikjohnston/synapse-find-unreferenced-state-groups" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/erikjohnston/synapse-find-unreferenced-state-groups'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c8afafd8479bd84bdf5005d029b412a83419268
[INFO] sha for GitHub repo erikjohnston/synapse-find-unreferenced-state-groups: 7c8afafd8479bd84bdf5005d029b412a83419268
[INFO] validating manifest of erikjohnston/synapse-find-unreferenced-state-groups on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of erikjohnston/synapse-find-unreferenced-state-groups on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing erikjohnston/synapse-find-unreferenced-state-groups
[INFO] finished frobbing erikjohnston/synapse-find-unreferenced-state-groups
[INFO] frobbed toml for erikjohnston/synapse-find-unreferenced-state-groups written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/erikjohnston/synapse-find-unreferenced-state-groups/Cargo.toml
[INFO] started frobbing erikjohnston/synapse-find-unreferenced-state-groups
[INFO] finished frobbing erikjohnston/synapse-find-unreferenced-state-groups
[INFO] frobbed toml for erikjohnston/synapse-find-unreferenced-state-groups written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/erikjohnston/synapse-find-unreferenced-state-groups/Cargo.toml
[INFO] crate erikjohnston/synapse-find-unreferenced-state-groups has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking erikjohnston/synapse-find-unreferenced-state-groups against try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-2/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/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" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1d19dd0f27ba2845ec957ad2630081b073db31663226900db209728464d878c1
[INFO] running `"docker" "start" "-a" "1d19dd0f27ba2845ec957ad2630081b073db31663226900db209728464d878c1"`
[INFO] [stderr]     Checking termios v0.3.0
[INFO] [stderr]     Checking postgres-protocol v0.3.2
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking postgres-shared v0.4.2
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]     Checking postgres v0.15.2
[INFO] [stderr]     Checking rust-synapse-find-unreferenced-state-groups v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |                 writeln!(fs, "{}", state_group);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |                 writeln!(fs, "{}", state_group);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.65s
[INFO] running `"docker" "inspect" "1d19dd0f27ba2845ec957ad2630081b073db31663226900db209728464d878c1"`
[INFO] running `"docker" "rm" "-f" "1d19dd0f27ba2845ec957ad2630081b073db31663226900db209728464d878c1"`
[INFO] [stdout] 1d19dd0f27ba2845ec957ad2630081b073db31663226900db209728464d878c1