[INFO] updating cached repository bcko/acr-cleaner
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bcko/acr-cleaner
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bcko/acr-cleaner" "work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bcko/acr-cleaner" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bcko/acr-cleaner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bcko/acr-cleaner'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea6276fcfadbfb1708dbe353224bc6960af8f73d
[INFO] sha for GitHub repo bcko/acr-cleaner: ea6276fcfadbfb1708dbe353224bc6960af8f73d
[INFO] validating manifest of bcko/acr-cleaner 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 bcko/acr-cleaner 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 bcko/acr-cleaner
[INFO] finished frobbing bcko/acr-cleaner
[INFO] frobbed toml for bcko/acr-cleaner written to work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner/Cargo.toml
[INFO] started frobbing bcko/acr-cleaner
[INFO] finished frobbing bcko/acr-cleaner
[INFO] frobbed toml for bcko/acr-cleaner written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bcko/acr-cleaner/Cargo.toml
[INFO] crate bcko/acr-cleaner 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 bcko/acr-cleaner 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner:/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] 3f97d4cf1ef4bdf43c1c936379cc2589af90820ec0a7a0d326902d4f3d06a18e
[INFO] running `"docker" "start" "-a" "3f97d4cf1ef4bdf43c1c936379cc2589af90820ec0a7a0d326902d4f3d06a18e"`
[INFO] [stderr]    Compiling syn v0.15.17
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling acr-cleaner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `az_acr_delete_output`
[INFO] [stderr]   --> src/main.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let az_acr_delete_output = Command::new("az")
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_az_acr_delete_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.80s
[INFO] running `"docker" "inspect" "3f97d4cf1ef4bdf43c1c936379cc2589af90820ec0a7a0d326902d4f3d06a18e"`
[INFO] running `"docker" "rm" "-f" "3f97d4cf1ef4bdf43c1c936379cc2589af90820ec0a7a0d326902d4f3d06a18e"`
[INFO] [stdout] 3f97d4cf1ef4bdf43c1c936379cc2589af90820ec0a7a0d326902d4f3d06a18e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner:/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] c0e06901a8b7f84f3ac23a02c7da2559714fb6490770bf6b1fe0f9e01e615cfb
[INFO] running `"docker" "start" "-a" "c0e06901a8b7f84f3ac23a02c7da2559714fb6490770bf6b1fe0f9e01e615cfb"`
[INFO] [stderr]    Compiling acr-cleaner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `az_acr_delete_output`
[INFO] [stderr]   --> src/main.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let az_acr_delete_output = Command::new("az")
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_az_acr_delete_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "c0e06901a8b7f84f3ac23a02c7da2559714fb6490770bf6b1fe0f9e01e615cfb"`
[INFO] running `"docker" "rm" "-f" "c0e06901a8b7f84f3ac23a02c7da2559714fb6490770bf6b1fe0f9e01e615cfb"`
[INFO] [stdout] c0e06901a8b7f84f3ac23a02c7da2559714fb6490770bf6b1fe0f9e01e615cfb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bcko/acr-cleaner:/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] 7804d0f7fe3092b5d0718b64d621e27a45b59924514936e2b1678a9dc9343b1f
[INFO] running `"docker" "start" "-a" "7804d0f7fe3092b5d0718b64d621e27a45b59924514936e2b1678a9dc9343b1f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/acr_cleaner-a404bef173671f25
[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" "7804d0f7fe3092b5d0718b64d621e27a45b59924514936e2b1678a9dc9343b1f"`
[INFO] running `"docker" "rm" "-f" "7804d0f7fe3092b5d0718b64d621e27a45b59924514936e2b1678a9dc9343b1f"`
[INFO] [stdout] 7804d0f7fe3092b5d0718b64d621e27a45b59924514936e2b1678a9dc9343b1f