[INFO] updating cached repository takenta/rustracer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/takenta/rustracer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/takenta/rustracer" "work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/takenta/rustracer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/rustracer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/rustracer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0f5097114c2aceefd1298a80568e1afa19319e06
[INFO] sha for GitHub repo takenta/rustracer: 0f5097114c2aceefd1298a80568e1afa19319e06
[INFO] validating manifest of takenta/rustracer 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 takenta/rustracer 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 takenta/rustracer
[INFO] finished frobbing takenta/rustracer
[INFO] frobbed toml for takenta/rustracer written to work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer/Cargo.toml
[INFO] started frobbing takenta/rustracer
[INFO] finished frobbing takenta/rustracer
[INFO] frobbed toml for takenta/rustracer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/rustracer/Cargo.toml
[INFO] crate takenta/rustracer 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 takenta/rustracer 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer:/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] a6efcede098595900744d5c8ce04d458c433d2f8c1b0f749c1a7a364d029b2be
[INFO] running `"docker" "start" "-a" "a6efcede098595900744d5c8ce04d458c433d2f8c1b0f749c1a7a364d029b2be"`
[INFO] [stderr]    Compiling regex v0.2.5
[INFO] [stderr]    Compiling rustracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cmd`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let cmd = Command::new("strace")
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_cmd`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.62s
[INFO] running `"docker" "inspect" "a6efcede098595900744d5c8ce04d458c433d2f8c1b0f749c1a7a364d029b2be"`
[INFO] running `"docker" "rm" "-f" "a6efcede098595900744d5c8ce04d458c433d2f8c1b0f749c1a7a364d029b2be"`
[INFO] [stdout] a6efcede098595900744d5c8ce04d458c433d2f8c1b0f749c1a7a364d029b2be
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer:/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] 642ca30c26ca1b4e8596692a27617347a00347bdc493a2b96b2246d88da1f83d
[INFO] running `"docker" "start" "-a" "642ca30c26ca1b4e8596692a27617347a00347bdc493a2b96b2246d88da1f83d"`
[INFO] [stderr]    Compiling rustracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cmd`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let cmd = Command::new("strace")
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_cmd`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "642ca30c26ca1b4e8596692a27617347a00347bdc493a2b96b2246d88da1f83d"`
[INFO] running `"docker" "rm" "-f" "642ca30c26ca1b4e8596692a27617347a00347bdc493a2b96b2246d88da1f83d"`
[INFO] [stdout] 642ca30c26ca1b4e8596692a27617347a00347bdc493a2b96b2246d88da1f83d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/rustracer:/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] 60c3c56a866ef8b6b4f0b74c2260f39df96a6f08525be0500a450dc3093e564f
[INFO] running `"docker" "start" "-a" "60c3c56a866ef8b6b4f0b74c2260f39df96a6f08525be0500a450dc3093e564f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustracer-04c8909ba2cd9e5c
[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" "60c3c56a866ef8b6b4f0b74c2260f39df96a6f08525be0500a450dc3093e564f"`
[INFO] running `"docker" "rm" "-f" "60c3c56a866ef8b6b4f0b74c2260f39df96a6f08525be0500a450dc3093e564f"`
[INFO] [stdout] 60c3c56a866ef8b6b4f0b74c2260f39df96a6f08525be0500a450dc3093e564f