[INFO] updating cached repository naftulikay/speedrace.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/naftulikay/speedrace.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/naftulikay/speedrace.rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/naftulikay/speedrace.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/naftulikay/speedrace.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/naftulikay/speedrace.rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/naftulikay/speedrace.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/naftulikay/speedrace.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd735eba5cdb8abf28f71f9eedc36078baf26ef5
[INFO] sha for GitHub repo naftulikay/speedrace.rs: fd735eba5cdb8abf28f71f9eedc36078baf26ef5
[INFO] validating manifest of naftulikay/speedrace.rs 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 naftulikay/speedrace.rs 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 naftulikay/speedrace.rs
[INFO] finished frobbing naftulikay/speedrace.rs
[INFO] frobbed toml for naftulikay/speedrace.rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/naftulikay/speedrace.rs/Cargo.toml
[INFO] started frobbing naftulikay/speedrace.rs
[INFO] finished frobbing naftulikay/speedrace.rs
[INFO] frobbed toml for naftulikay/speedrace.rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/naftulikay/speedrace.rs/Cargo.toml
[INFO] crate naftulikay/speedrace.rs 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 naftulikay/speedrace.rs 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-1/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/naftulikay/speedrace.rs:/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] 09c1917ee12a2d6e11152b7780d96adfde4fe7d5b074b196dc0317bc6cf9462a
[INFO] running `"docker" "start" "-a" "09c1917ee12a2d6e11152b7780d96adfde4fe7d5b074b196dc0317bc6cf9462a"`
[INFO] [stderr]    Compiling parking_lot_core v0.2.6
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling speedracers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable `w` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let mut w: u64 = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_w` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.36s
[INFO] running `"docker" "inspect" "09c1917ee12a2d6e11152b7780d96adfde4fe7d5b074b196dc0317bc6cf9462a"`
[INFO] running `"docker" "rm" "-f" "09c1917ee12a2d6e11152b7780d96adfde4fe7d5b074b196dc0317bc6cf9462a"`
[INFO] [stdout] 09c1917ee12a2d6e11152b7780d96adfde4fe7d5b074b196dc0317bc6cf9462a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/naftulikay/speedrace.rs:/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] 9210adf6ff9b0b313a9a0f77fe68d70cfb599efb5c507392b6348460e129154b
[INFO] running `"docker" "start" "-a" "9210adf6ff9b0b313a9a0f77fe68d70cfb599efb5c507392b6348460e129154b"`
[INFO] [stderr]    Compiling speedracers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable `w` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let mut w: u64 = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_w` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "9210adf6ff9b0b313a9a0f77fe68d70cfb599efb5c507392b6348460e129154b"`
[INFO] running `"docker" "rm" "-f" "9210adf6ff9b0b313a9a0f77fe68d70cfb599efb5c507392b6348460e129154b"`
[INFO] [stdout] 9210adf6ff9b0b313a9a0f77fe68d70cfb599efb5c507392b6348460e129154b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/naftulikay/speedrace.rs:/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] c7f6e2cfbf953bd8ee18e96fa56efaedf1e653fae662a552d4fd5fefff63b1ad
[INFO] running `"docker" "start" "-a" "c7f6e2cfbf953bd8ee18e96fa56efaedf1e653fae662a552d4fd5fefff63b1ad"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/speedracers-eab4072b648469fe
[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" "c7f6e2cfbf953bd8ee18e96fa56efaedf1e653fae662a552d4fd5fefff63b1ad"`
[INFO] running `"docker" "rm" "-f" "c7f6e2cfbf953bd8ee18e96fa56efaedf1e653fae662a552d4fd5fefff63b1ad"`
[INFO] [stdout] c7f6e2cfbf953bd8ee18e96fa56efaedf1e653fae662a552d4fd5fefff63b1ad