[INFO] crate cargo-mutagen 0.1.2 is already in cache
[INFO] extracting crate cargo-mutagen 0.1.2 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/cargo-mutagen/0.1.2
[INFO] extracting crate cargo-mutagen 0.1.2 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/cargo-mutagen/0.1.2
[INFO] validating manifest of cargo-mutagen-0.1.2 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 cargo-mutagen-0.1.2 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 cargo-mutagen-0.1.2
[INFO] finished frobbing cargo-mutagen-0.1.2
[INFO] frobbed toml for cargo-mutagen-0.1.2 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/cargo-mutagen/0.1.2/Cargo.toml
[INFO] started frobbing cargo-mutagen-0.1.2
[INFO] finished frobbing cargo-mutagen-0.1.2
[INFO] frobbed toml for cargo-mutagen-0.1.2 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/cargo-mutagen/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 cargo-mutagen-0.1.2 against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-7/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/cargo-mutagen/0.1.2:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 7aa4680ac7831e39610e7edda38e510bcf2bed76847a133f39c3570add3ed0b0
[INFO] running `"docker" "start" "-a" "7aa4680ac7831e39610e7edda38e510bcf2bed76847a133f39c3570add3ed0b0"`
[INFO] [stderr]    Compiling cargo-mutagen v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `"docker" "inspect" "7aa4680ac7831e39610e7edda38e510bcf2bed76847a133f39c3570add3ed0b0"`
[INFO] running `"docker" "rm" "-f" "7aa4680ac7831e39610e7edda38e510bcf2bed76847a133f39c3570add3ed0b0"`
[INFO] [stdout] 7aa4680ac7831e39610e7edda38e510bcf2bed76847a133f39c3570add3ed0b0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-7/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/cargo-mutagen/0.1.2:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] c498d042bab85459bdd6bedd5f185765572ef03dc53e0c9d803e01f22a75bba8
[INFO] running `"docker" "start" "-a" "c498d042bab85459bdd6bedd5f185765572ef03dc53e0c9d803e01f22a75bba8"`
[INFO] [stderr]    Compiling cargo-mutagen v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "c498d042bab85459bdd6bedd5f185765572ef03dc53e0c9d803e01f22a75bba8"`
[INFO] running `"docker" "rm" "-f" "c498d042bab85459bdd6bedd5f185765572ef03dc53e0c9d803e01f22a75bba8"`
[INFO] [stdout] c498d042bab85459bdd6bedd5f185765572ef03dc53e0c9d803e01f22a75bba8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-7/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/cargo-mutagen/0.1.2:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] 11d9f91cd3f3a744fb04eedd6adf19d9772dce45b26e5b92fa6eb96ac4c6be40
[INFO] running `"docker" "start" "-a" "11d9f91cd3f3a744fb04eedd6adf19d9772dce45b26e5b92fa6eb96ac4c6be40"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_mutagen-446c1cb3fc6e12e4
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test runner::tests::it_returns_no_tests_on_empty ... ok
[INFO] [stdout] test runner::tests::it_returns_test_if_they_were_added ... ok
[INFO] [stdout] test tests::it_decodes_well_formed_mutations ... ok
[INFO] [stdout] test tests::it_fails_to_decode_malformed_mutations ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "11d9f91cd3f3a744fb04eedd6adf19d9772dce45b26e5b92fa6eb96ac4c6be40"`
[INFO] running `"docker" "rm" "-f" "11d9f91cd3f3a744fb04eedd6adf19d9772dce45b26e5b92fa6eb96ac4c6be40"`
[INFO] [stdout] 11d9f91cd3f3a744fb04eedd6adf19d9772dce45b26e5b92fa6eb96ac4c6be40