[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-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/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-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/erikjohnston/synapse-find-unreferenced-state-groups"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of erikjohnston/synapse-find-unreferenced-state-groups on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-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-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/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-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing erikjohnston/synapse-find-unreferenced-state-groups against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] feea6590d662134f37a20321cf6271b3121da4fd729b54c2aa2b37077dc5aca1
[INFO] running `"docker" "start" "-a" "feea6590d662134f37a20321cf6271b3121da4fd729b54c2aa2b37077dc5aca1"`
[INFO] [stderr]    Compiling termios v0.3.0
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling postgres-protocol v0.3.2
[INFO] [stderr]    Compiling console v0.6.2
[INFO] [stderr]    Compiling postgres-shared v0.4.2
[INFO] [stderr]    Compiling postgres v0.15.2
[INFO] [stderr]    Compiling indicatif v0.9.0
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 31.27s
[INFO] running `"docker" "inspect" "feea6590d662134f37a20321cf6271b3121da4fd729b54c2aa2b37077dc5aca1"`
[INFO] running `"docker" "rm" "-f" "feea6590d662134f37a20321cf6271b3121da4fd729b54c2aa2b37077dc5aca1"`
[INFO] [stdout] feea6590d662134f37a20321cf6271b3121da4fd729b54c2aa2b37077dc5aca1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b155ead9107aa2085b0e451b7c7f10503ce33e3f6498bbea6d83b70052fe3336
[INFO] running `"docker" "start" "-a" "b155ead9107aa2085b0e451b7c7f10503ce33e3f6498bbea6d83b70052fe3336"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `"docker" "inspect" "b155ead9107aa2085b0e451b7c7f10503ce33e3f6498bbea6d83b70052fe3336"`
[INFO] running `"docker" "rm" "-f" "b155ead9107aa2085b0e451b7c7f10503ce33e3f6498bbea6d83b70052fe3336"`
[INFO] [stdout] b155ead9107aa2085b0e451b7c7f10503ce33e3f6498bbea6d83b70052fe3336
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] 70baae3856b6262846d292ba21b0ff6a10481448ba2fff77faf0254d7f68d51a
[INFO] running `"docker" "start" "-a" "70baae3856b6262846d292ba21b0ff6a10481448ba2fff77faf0254d7f68d51a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_synapse_find_unreferenced_state_groups-8160d7b8e7a7c130
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "70baae3856b6262846d292ba21b0ff6a10481448ba2fff77faf0254d7f68d51a"`
[INFO] running `"docker" "rm" "-f" "70baae3856b6262846d292ba21b0ff6a10481448ba2fff77faf0254d7f68d51a"`
[INFO] [stdout] 70baae3856b6262846d292ba21b0ff6a10481448ba2fff77faf0254d7f68d51a