[INFO] cloning repository ajames72/rust-basics
[INFO] running `"git" "clone" "--bare" "git://github.com/ajames72/rust-basics.git" "work/cache/sources/gh/ajames72/rust-basics"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ajames72/rust-basics'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ajames72/rust-basics" "work/ex/beta-1.37-6/sources/1.36.0/gh/ajames72/rust-basics"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ajames72/rust-basics'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ajames72/rust-basics" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ajames72/rust-basics"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ajames72/rust-basics'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2628779b41d77c2c35a75e1ab3bce18f3631779c
[INFO] sha for GitHub repo ajames72/rust-basics: 2628779b41d77c2c35a75e1ab3bce18f3631779c
[INFO] validating manifest of ajames72/rust-basics 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 ajames72/rust-basics 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 ajames72/rust-basics
[INFO] finished frobbing ajames72/rust-basics
[INFO] frobbed toml for ajames72/rust-basics written to work/ex/beta-1.37-6/sources/1.36.0/gh/ajames72/rust-basics/Cargo.toml
[INFO] started frobbing ajames72/rust-basics
[INFO] finished frobbing ajames72/rust-basics
[INFO] frobbed toml for ajames72/rust-basics written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ajames72/rust-basics/Cargo.toml
[INFO] crate ajames72/rust-basics 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 ajames72/rust-basics 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-6/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/ajames72/rust-basics:/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] 991a5e95f8a532cc73e5b515059f5d4759b621c50a1d68e78694afe85bcfb3e6
[INFO] running `"docker" "start" "-a" "991a5e95f8a532cc73e5b515059f5d4759b621c50a1d68e78694afe85bcfb3e6"`
[INFO] [stderr]    Compiling rust-basics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/basics.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |         let x = 7; // generates a warning 'help: consider using `_x` instead'
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "991a5e95f8a532cc73e5b515059f5d4759b621c50a1d68e78694afe85bcfb3e6"`
[INFO] running `"docker" "rm" "-f" "991a5e95f8a532cc73e5b515059f5d4759b621c50a1d68e78694afe85bcfb3e6"`
[INFO] [stdout] 991a5e95f8a532cc73e5b515059f5d4759b621c50a1d68e78694afe85bcfb3e6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/ajames72/rust-basics:/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] 5bef3938835e549fff32b7121a511273a6b4454cb75763cf45d23e7164a8bac6
[INFO] running `"docker" "start" "-a" "5bef3938835e549fff32b7121a511273a6b4454cb75763cf45d23e7164a8bac6"`
[INFO] [stderr]    Compiling rust-basics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/basics.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |         let x = 7; // generates a warning 'help: consider using `_x` instead'
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "5bef3938835e549fff32b7121a511273a6b4454cb75763cf45d23e7164a8bac6"`
[INFO] running `"docker" "rm" "-f" "5bef3938835e549fff32b7121a511273a6b4454cb75763cf45d23e7164a8bac6"`
[INFO] [stdout] 5bef3938835e549fff32b7121a511273a6b4454cb75763cf45d23e7164a8bac6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/ajames72/rust-basics:/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] 84f7f27e1d2b45beb87500aab0ef4b00de1c1758980c498014f7de340875fd61
[INFO] running `"docker" "start" "-a" "84f7f27e1d2b45beb87500aab0ef4b00de1c1758980c498014f7de340875fd61"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_basics-2a2200c64d78b26e
[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" "84f7f27e1d2b45beb87500aab0ef4b00de1c1758980c498014f7de340875fd61"`
[INFO] running `"docker" "rm" "-f" "84f7f27e1d2b45beb87500aab0ef4b00de1c1758980c498014f7de340875fd61"`
[INFO] [stdout] 84f7f27e1d2b45beb87500aab0ef4b00de1c1758980c498014f7de340875fd61