[INFO] updating cached repository HappyDustbunny/crystal
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/HappyDustbunny/crystal
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/HappyDustbunny/crystal" "work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/HappyDustbunny/crystal" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HappyDustbunny/crystal"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HappyDustbunny/crystal'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4ba604a99f4ef785a593e85f710bba4a0658130c
[INFO] sha for GitHub repo HappyDustbunny/crystal: 4ba604a99f4ef785a593e85f710bba4a0658130c
[INFO] validating manifest of HappyDustbunny/crystal 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 HappyDustbunny/crystal 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 HappyDustbunny/crystal
[INFO] finished frobbing HappyDustbunny/crystal
[INFO] frobbed toml for HappyDustbunny/crystal written to work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal/Cargo.toml
[INFO] started frobbing HappyDustbunny/crystal
[INFO] finished frobbing HappyDustbunny/crystal
[INFO] frobbed toml for HappyDustbunny/crystal written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HappyDustbunny/crystal/Cargo.toml
[INFO] crate HappyDustbunny/crystal 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 HappyDustbunny/crystal 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal:/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] 27f7044d563ae9478dc5745d92bd96862f61ce91e1e17aaa891afb3ef5463371
[INFO] running `"docker" "start" "-a" "27f7044d563ae9478dc5745d92bd96862f61ce91e1e17aaa891afb3ef5463371"`
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.13.0
[INFO] [stderr]    Compiling crystal v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/main.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let mut y = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.47s
[INFO] running `"docker" "inspect" "27f7044d563ae9478dc5745d92bd96862f61ce91e1e17aaa891afb3ef5463371"`
[INFO] running `"docker" "rm" "-f" "27f7044d563ae9478dc5745d92bd96862f61ce91e1e17aaa891afb3ef5463371"`
[INFO] [stdout] 27f7044d563ae9478dc5745d92bd96862f61ce91e1e17aaa891afb3ef5463371
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal:/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] 700b2d938c11d48aef413d663daace8482344cd99539fc90de1ba2a5f47e2e88
[INFO] running `"docker" "start" "-a" "700b2d938c11d48aef413d663daace8482344cd99539fc90de1ba2a5f47e2e88"`
[INFO] [stderr]    Compiling crystal v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/main.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let mut y = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "700b2d938c11d48aef413d663daace8482344cd99539fc90de1ba2a5f47e2e88"`
[INFO] running `"docker" "rm" "-f" "700b2d938c11d48aef413d663daace8482344cd99539fc90de1ba2a5f47e2e88"`
[INFO] [stdout] 700b2d938c11d48aef413d663daace8482344cd99539fc90de1ba2a5f47e2e88
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/HappyDustbunny/crystal:/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] b6e172fca4196a74b7b512e6e192b217e46fd9079dacd0559f57d09f9468535f
[INFO] running `"docker" "start" "-a" "b6e172fca4196a74b7b512e6e192b217e46fd9079dacd0559f57d09f9468535f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crystal-20b2c2e2156ff852
[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" "b6e172fca4196a74b7b512e6e192b217e46fd9079dacd0559f57d09f9468535f"`
[INFO] running `"docker" "rm" "-f" "b6e172fca4196a74b7b512e6e192b217e46fd9079dacd0559f57d09f9468535f"`
[INFO] [stdout] b6e172fca4196a74b7b512e6e192b217e46fd9079dacd0559f57d09f9468535f