[INFO] cloning repository erikjohnston/synapse-find-unreferenced-state-groups
[INFO] running `"git" "clone" "--bare" "git://github.com/erikjohnston/synapse-find-unreferenced-state-groups.git" "work/cache/sources/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/erikjohnston/synapse-find-unreferenced-state-groups'...
[INFO] running `"git" "clone" "work/cache/sources/gh/erikjohnston/synapse-find-unreferenced-state-groups" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/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#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of erikjohnston/synapse-find-unreferenced-state-groups on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-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-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking erikjohnston/synapse-find-unreferenced-state-groups against try#290ac7b29f41ff9fa5232f9a1116ea71a3501063 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-0/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/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" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f85f40c9dbcac84d76bda5dad3b5aa467a7fe35598209e5852d21c9a6f14d6c0
[INFO] running `"docker" "start" "-a" "f85f40c9dbcac84d76bda5dad3b5aa467a7fe35598209e5852d21c9a6f14d6c0"`
[INFO] [stderr]     Checking termios v0.3.0
[INFO] [stderr]     Checking regex v0.2.11
[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 8.32s
[INFO] running `"docker" "inspect" "f85f40c9dbcac84d76bda5dad3b5aa467a7fe35598209e5852d21c9a6f14d6c0"`
[INFO] running `"docker" "rm" "-f" "f85f40c9dbcac84d76bda5dad3b5aa467a7fe35598209e5852d21c9a6f14d6c0"`
[INFO] [stdout] f85f40c9dbcac84d76bda5dad3b5aa467a7fe35598209e5852d21c9a6f14d6c0