[INFO] crate completable_future 0.1.0 is already in cache
[INFO] extracting crate completable_future 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/completable_future/0.1.0
[INFO] extracting crate completable_future 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/completable_future/0.1.0
[INFO] validating manifest of completable_future-0.1.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of completable_future-0.1.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing completable_future-0.1.0
[INFO] finished frobbing completable_future-0.1.0
[INFO] frobbed toml for completable_future-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/completable_future/0.1.0/Cargo.toml
[INFO] started frobbing completable_future-0.1.0
[INFO] finished frobbing completable_future-0.1.0
[INFO] frobbed toml for completable_future-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/completable_future/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing completable_future-0.1.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/completable_future/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] e76089118ce4fa54bc65f9da2f2d0174f4e2eb0a1034a23b13f6626112aefd71
[INFO] running `"docker" "start" "-a" "e76089118ce4fa54bc65f9da2f2d0174f4e2eb0a1034a23b13f6626112aefd71"`
[INFO] [stderr]    Compiling completable_future v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `"docker" "inspect" "e76089118ce4fa54bc65f9da2f2d0174f4e2eb0a1034a23b13f6626112aefd71"`
[INFO] running `"docker" "rm" "-f" "e76089118ce4fa54bc65f9da2f2d0174f4e2eb0a1034a23b13f6626112aefd71"`
[INFO] [stdout] e76089118ce4fa54bc65f9da2f2d0174f4e2eb0a1034a23b13f6626112aefd71
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/completable_future/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 600bd50dd47e7558a67f5a01d0cd1b969d1baaa8adde90d8654065feee989ada
[INFO] running `"docker" "start" "-a" "600bd50dd47e7558a67f5a01d0cd1b969d1baaa8adde90d8654065feee989ada"`
[INFO] [stderr]    Compiling completable_future v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/tests.rs:75:7
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut tm = mutate_counter.clone();
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/tests.rs:97:7
[INFO] [stderr]    |
[INFO] [stderr] 97 |         let mut tm = mutate_counter.clone();
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.00s
[INFO] running `"docker" "inspect" "600bd50dd47e7558a67f5a01d0cd1b969d1baaa8adde90d8654065feee989ada"`
[INFO] running `"docker" "rm" "-f" "600bd50dd47e7558a67f5a01d0cd1b969d1baaa8adde90d8654065feee989ada"`
[INFO] [stdout] 600bd50dd47e7558a67f5a01d0cd1b969d1baaa8adde90d8654065feee989ada
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/completable_future/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 2236092958df4b72900dcf045c652179e4592ee9594f958ea7df4e9b4c8ed009
[INFO] running `"docker" "start" "-a" "2236092958df4b72900dcf045c652179e4592ee9594f958ea7df4e9b4c8ed009"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/completable_future-a610f0e1964dc7a2
[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] [stderr]      Running /opt/crater/target/debug/deps/tests-71fc4b9b45deb249
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test_completed_future ... ok
[INFO] [stdout] test test_errored_future ... ok
[INFO] [stdout] test test_signal_error ... ok
[INFO] [stdout] test test_error_once ... ok
[INFO] [stdout] test test_signal_complete ... ok
[INFO] [stdout] test test_complete_once ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests completable_future
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2236092958df4b72900dcf045c652179e4592ee9594f958ea7df4e9b4c8ed009"`
[INFO] running `"docker" "rm" "-f" "2236092958df4b72900dcf045c652179e4592ee9594f958ea7df4e9b4c8ed009"`
[INFO] [stdout] 2236092958df4b72900dcf045c652179e4592ee9594f958ea7df4e9b4c8ed009