[INFO] cloning repository ffjanp/finding_cycles
[INFO] running `"git" "clone" "--bare" "git://github.com/ffjanp/finding_cycles.git" "work/cache/sources/gh/ffjanp/finding_cycles"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ffjanp/finding_cycles'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ffjanp/finding_cycles" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ffjanp/finding_cycles" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/finding_cycles"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/finding_cycles'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7681c5b78f8998a8c9db7cfc6a1a7de70834b09b
[INFO] sha for GitHub repo ffjanp/finding_cycles: 7681c5b78f8998a8c9db7cfc6a1a7de70834b09b
[INFO] validating manifest of ffjanp/finding_cycles on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ffjanp/finding_cycles on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ffjanp/finding_cycles
[INFO] finished frobbing ffjanp/finding_cycles
[INFO] frobbed toml for ffjanp/finding_cycles written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles/Cargo.toml
[INFO] started frobbing ffjanp/finding_cycles
[INFO] finished frobbing ffjanp/finding_cycles
[INFO] frobbed toml for ffjanp/finding_cycles written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/finding_cycles/Cargo.toml
[INFO] crate ffjanp/finding_cycles already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ffjanp/finding_cycles against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] 16b9d5f1bee97d9cffdef4405bb7a2eaa4f7ed942466fec8d59cf8df3815fd6b
[INFO] running `"docker" "start" "-a" "16b9d5f1bee97d9cffdef4405bb7a2eaa4f7ed942466fec8d59cf8df3815fd6b"`
[INFO] [stderr]    Compiling rand v0.6.3
[INFO] [stderr]    Compiling rand_xoshiro v0.1.0
[INFO] [stderr]    Compiling rand_os v0.1.0
[INFO] [stderr]    Compiling finding_cycles v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:153:13
[INFO] [stderr]     |
[INFO] [stderr] 153 |         let mut length: usize = new_graph.nodes.len();
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.52s
[INFO] running `"docker" "inspect" "16b9d5f1bee97d9cffdef4405bb7a2eaa4f7ed942466fec8d59cf8df3815fd6b"`
[INFO] running `"docker" "rm" "-f" "16b9d5f1bee97d9cffdef4405bb7a2eaa4f7ed942466fec8d59cf8df3815fd6b"`
[INFO] [stdout] 16b9d5f1bee97d9cffdef4405bb7a2eaa4f7ed942466fec8d59cf8df3815fd6b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9faeaecfbed01a46da44c9886acce596c866675c9937e626cbf7eb0ce29adf04
[INFO] running `"docker" "start" "-a" "9faeaecfbed01a46da44c9886acce596c866675c9937e626cbf7eb0ce29adf04"`
[INFO] [stderr]    Compiling finding_cycles v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:153:13
[INFO] [stderr]     |
[INFO] [stderr] 153 |         let mut length: usize = new_graph.nodes.len();
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "9faeaecfbed01a46da44c9886acce596c866675c9937e626cbf7eb0ce29adf04"`
[INFO] running `"docker" "rm" "-f" "9faeaecfbed01a46da44c9886acce596c866675c9937e626cbf7eb0ce29adf04"`
[INFO] [stdout] 9faeaecfbed01a46da44c9886acce596c866675c9937e626cbf7eb0ce29adf04
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/finding_cycles:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] 8130ddd55ec26f07722c2bdea0118c258d8bc64e71e894f34656fdf5ddf0b6fd
[INFO] running `"docker" "start" "-a" "8130ddd55ec26f07722c2bdea0118c258d8bc64e71e894f34656fdf5ddf0b6fd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/finding_cycles-ca795acdd0bef8ac
[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" "8130ddd55ec26f07722c2bdea0118c258d8bc64e71e894f34656fdf5ddf0b6fd"`
[INFO] running `"docker" "rm" "-f" "8130ddd55ec26f07722c2bdea0118c258d8bc64e71e894f34656fdf5ddf0b6fd"`
[INFO] [stdout] 8130ddd55ec26f07722c2bdea0118c258d8bc64e71e894f34656fdf5ddf0b6fd