[INFO] cloning repository HappyDustbunny/crystal
[INFO] running `"git" "clone" "--bare" "git://github.com/HappyDustbunny/crystal.git" "work/cache/sources/gh/HappyDustbunny/crystal"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/HappyDustbunny/crystal'...
[INFO] running `"git" "clone" "work/cache/sources/gh/HappyDustbunny/crystal" "work/ex/beta-1.37-6/sources/1.36.0/gh/HappyDustbunny/crystal"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/HappyDustbunny/crystal'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/HappyDustbunny/crystal" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/HappyDustbunny/crystal"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of HappyDustbunny/crystal on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing HappyDustbunny/crystal against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 6cd6cb3c2328be136d48e376b7ad4493fb32ab3891e85ad1900105fd9566900c
[INFO] running `"docker" "start" "-a" "6cd6cb3c2328be136d48e376b7ad4493fb32ab3891e85ad1900105fd9566900c"`
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling deflate v0.7.19
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling rayon v1.1.0
[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 34.27s
[INFO] running `"docker" "inspect" "6cd6cb3c2328be136d48e376b7ad4493fb32ab3891e85ad1900105fd9566900c"`
[INFO] running `"docker" "rm" "-f" "6cd6cb3c2328be136d48e376b7ad4493fb32ab3891e85ad1900105fd9566900c"`
[INFO] [stdout] 6cd6cb3c2328be136d48e376b7ad4493fb32ab3891e85ad1900105fd9566900c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] be8fb1d6d5872c0f71629e755257bfb0f99dd37d8b22851c36cb21f5c6f45716
[INFO] running `"docker" "start" "-a" "be8fb1d6d5872c0f71629e755257bfb0f99dd37d8b22851c36cb21f5c6f45716"`
[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 0.96s
[INFO] running `"docker" "inspect" "be8fb1d6d5872c0f71629e755257bfb0f99dd37d8b22851c36cb21f5c6f45716"`
[INFO] running `"docker" "rm" "-f" "be8fb1d6d5872c0f71629e755257bfb0f99dd37d8b22851c36cb21f5c6f45716"`
[INFO] [stdout] be8fb1d6d5872c0f71629e755257bfb0f99dd37d8b22851c36cb21f5c6f45716
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 4d07ffecde23ce48127ac0771c34536b7852d941e34c6313d8d245c09437e63a
[INFO] running `"docker" "start" "-a" "4d07ffecde23ce48127ac0771c34536b7852d941e34c6313d8d245c09437e63a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crystal-b3ef2c94ea249b54
[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" "4d07ffecde23ce48127ac0771c34536b7852d941e34c6313d8d245c09437e63a"`
[INFO] running `"docker" "rm" "-f" "4d07ffecde23ce48127ac0771c34536b7852d941e34c6313d8d245c09437e63a"`
[INFO] [stdout] 4d07ffecde23ce48127ac0771c34536b7852d941e34c6313d8d245c09437e63a