[INFO] updating cached repository intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression" "work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d04b55311c050674f9363d474d20b32982e9e45f
[INFO] sha for GitHub repo intrepion/example-x-rust-x-rustbyexample-com-x-expression: d04b55311c050674f9363d474d20b32982e9e45f
[INFO] validating manifest of intrepion/example-x-rust-x-rustbyexample-com-x-expression 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 intrepion/example-x-rust-x-rustbyexample-com-x-expression 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 intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-expression written to work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression/Cargo.toml
[INFO] started frobbing intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-expression
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-expression written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression/Cargo.toml
[INFO] crate intrepion/example-x-rust-x-rustbyexample-com-x-expression 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 intrepion/example-x-rust-x-rustbyexample-com-x-expression against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 4b1d2bf826d2418e97de45ab2b21bccd79b307cd0b71201805d60d0a1b57f8b3
[INFO] running `"docker" "start" "-a" "4b1d2bf826d2418e97de45ab2b21bccd79b307cd0b71201805d60d0a1b57f8b3"`
[INFO] [stderr]    Compiling example-x-rust-x-rustbyexample-com-x-expression v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "4b1d2bf826d2418e97de45ab2b21bccd79b307cd0b71201805d60d0a1b57f8b3"`
[INFO] running `"docker" "rm" "-f" "4b1d2bf826d2418e97de45ab2b21bccd79b307cd0b71201805d60d0a1b57f8b3"`
[INFO] [stdout] 4b1d2bf826d2418e97de45ab2b21bccd79b307cd0b71201805d60d0a1b57f8b3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a1d7ce4cbafd98a349159de6709744ff7f7acfa8d8fe7ddaf160982f10f202fb
[INFO] running `"docker" "start" "-a" "a1d7ce4cbafd98a349159de6709744ff7f7acfa8d8fe7ddaf160982f10f202fb"`
[INFO] [stderr]    Compiling example-x-rust-x-rustbyexample-com-x-expression v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `"docker" "inspect" "a1d7ce4cbafd98a349159de6709744ff7f7acfa8d8fe7ddaf160982f10f202fb"`
[INFO] running `"docker" "rm" "-f" "a1d7ce4cbafd98a349159de6709744ff7f7acfa8d8fe7ddaf160982f10f202fb"`
[INFO] [stdout] a1d7ce4cbafd98a349159de6709744ff7f7acfa8d8fe7ddaf160982f10f202fb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/example-x-rust-x-rustbyexample-com-x-expression:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 46d18e959c7e81ee4370d326a0a14e79309c452a41889be046509df586fbd4c6
[INFO] running `"docker" "start" "-a" "46d18e959c7e81ee4370d326a0a14e79309c452a41889be046509df586fbd4c6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/example_x_rust_x_rustbyexample_com_x_expression-92f4b6a2ed456848
[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" "46d18e959c7e81ee4370d326a0a14e79309c452a41889be046509df586fbd4c6"`
[INFO] running `"docker" "rm" "-f" "46d18e959c7e81ee4370d326a0a14e79309c452a41889be046509df586fbd4c6"`
[INFO] [stdout] 46d18e959c7e81ee4370d326a0a14e79309c452a41889be046509df586fbd4c6