[INFO] updating cached repository crumblingstatue/mkqcb
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/crumblingstatue/mkqcb
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/crumblingstatue/mkqcb" "work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/crumblingstatue/mkqcb" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crumblingstatue/mkqcb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crumblingstatue/mkqcb'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d8b0ca9f23ba9fced36e701553a552380d22768e
[INFO] sha for GitHub repo crumblingstatue/mkqcb: d8b0ca9f23ba9fced36e701553a552380d22768e
[INFO] validating manifest of crumblingstatue/mkqcb 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 crumblingstatue/mkqcb 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 crumblingstatue/mkqcb
[INFO] finished frobbing crumblingstatue/mkqcb
[INFO] frobbed toml for crumblingstatue/mkqcb written to work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb/Cargo.toml
[INFO] started frobbing crumblingstatue/mkqcb
[INFO] finished frobbing crumblingstatue/mkqcb
[INFO] frobbed toml for crumblingstatue/mkqcb written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crumblingstatue/mkqcb/Cargo.toml
[INFO] crate crumblingstatue/mkqcb already has a lockfile, it will not be regenerated
[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 crumblingstatue/mkqcb against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2fca77bb467a547b9c218f0a00550c088ac269f27ec54c7dbf9ea208594c514f
[INFO] running `"docker" "start" "-a" "2fca77bb467a547b9c218f0a00550c088ac269f27ec54c7dbf9ea208594c514f"`
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling mkqcb v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.97s
[INFO] running `"docker" "inspect" "2fca77bb467a547b9c218f0a00550c088ac269f27ec54c7dbf9ea208594c514f"`
[INFO] running `"docker" "rm" "-f" "2fca77bb467a547b9c218f0a00550c088ac269f27ec54c7dbf9ea208594c514f"`
[INFO] [stdout] 2fca77bb467a547b9c218f0a00550c088ac269f27ec54c7dbf9ea208594c514f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ad36831cc9269b71b41f90aebc766ceec9cdaf5351dfcdd4e4635505d943375c
[INFO] running `"docker" "start" "-a" "ad36831cc9269b71b41f90aebc766ceec9cdaf5351dfcdd4e4635505d943375c"`
[INFO] [stderr]    Compiling mkqcb v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "ad36831cc9269b71b41f90aebc766ceec9cdaf5351dfcdd4e4635505d943375c"`
[INFO] running `"docker" "rm" "-f" "ad36831cc9269b71b41f90aebc766ceec9cdaf5351dfcdd4e4635505d943375c"`
[INFO] [stdout] ad36831cc9269b71b41f90aebc766ceec9cdaf5351dfcdd4e4635505d943375c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/crumblingstatue/mkqcb:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4f7b759ecae08d0eae0bb3417d0234b4f438834e9708d7a29975289b1f15606b
[INFO] running `"docker" "start" "-a" "4f7b759ecae08d0eae0bb3417d0234b4f438834e9708d7a29975289b1f15606b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mkqcb-e04f343c16e4a5d6
[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" "4f7b759ecae08d0eae0bb3417d0234b4f438834e9708d7a29975289b1f15606b"`
[INFO] running `"docker" "rm" "-f" "4f7b759ecae08d0eae0bb3417d0234b4f438834e9708d7a29975289b1f15606b"`
[INFO] [stdout] 4f7b759ecae08d0eae0bb3417d0234b4f438834e9708d7a29975289b1f15606b