[INFO] updating cached repository springbov/stupid-shell
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/springbov/stupid-shell
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/springbov/stupid-shell" "work/ex/beta-1.37-6/sources/1.36.0/gh/springbov/stupid-shell"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/springbov/stupid-shell'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/springbov/stupid-shell" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/springbov/stupid-shell"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/springbov/stupid-shell'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 404140e8d704cb82d7cc510c3a9e96be39c5444b
[INFO] sha for GitHub repo springbov/stupid-shell: 404140e8d704cb82d7cc510c3a9e96be39c5444b
[INFO] validating manifest of springbov/stupid-shell 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 springbov/stupid-shell 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 springbov/stupid-shell
[INFO] finished frobbing springbov/stupid-shell
[INFO] frobbed toml for springbov/stupid-shell written to work/ex/beta-1.37-6/sources/1.36.0/gh/springbov/stupid-shell/Cargo.toml
[INFO] started frobbing springbov/stupid-shell
[INFO] finished frobbing springbov/stupid-shell
[INFO] frobbed toml for springbov/stupid-shell written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/springbov/stupid-shell/Cargo.toml
[INFO] crate springbov/stupid-shell 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 springbov/stupid-shell 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-7/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/springbov/stupid-shell:/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] cd9a04480b570c6e32a54faf976167096308634df6194fb1e1f9db30de717582
[INFO] running `"docker" "start" "-a" "cd9a04480b570c6e32a54faf976167096308634df6194fb1e1f9db30de717582"`
[INFO] [stderr]    Compiling stupid-shell v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:19:10
[INFO] [stderr]    |
[INFO] [stderr] 19 |   fn vim(x: Option<String>) -> Option<String>
[INFO] [stderr]    |          ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |   fn emacs(x: Option<String>) -> Option<String>
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:45:11
[INFO] [stderr]    |
[INFO] [stderr] 45 |   fn nano(x: Option<String>) -> Option<String>
[INFO] [stderr]    |           ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |   fn ed(x: Option<String>) -> Option<String>
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |   fn butterfly(x: Option<String>) -> Option<String>
[INFO] [stderr]    |                ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:70:11
[INFO] [stderr]    |
[INFO] [stderr] 70 |   fn life(x: Option<String>) -> Option<String>
[INFO] [stderr]    |           ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `"docker" "inspect" "cd9a04480b570c6e32a54faf976167096308634df6194fb1e1f9db30de717582"`
[INFO] running `"docker" "rm" "-f" "cd9a04480b570c6e32a54faf976167096308634df6194fb1e1f9db30de717582"`
[INFO] [stdout] cd9a04480b570c6e32a54faf976167096308634df6194fb1e1f9db30de717582
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/springbov/stupid-shell:/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] dcbd5a063ab7a30f53b1967300ea32ea597b1ba5c1ee20280c82d5726bb2d745
[INFO] running `"docker" "start" "-a" "dcbd5a063ab7a30f53b1967300ea32ea597b1ba5c1ee20280c82d5726bb2d745"`
[INFO] [stderr]    Compiling stupid-shell v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:19:10
[INFO] [stderr]    |
[INFO] [stderr] 19 |   fn vim(x: Option<String>) -> Option<String>
[INFO] [stderr]    |          ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |   fn emacs(x: Option<String>) -> Option<String>
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:45:11
[INFO] [stderr]    |
[INFO] [stderr] 45 |   fn nano(x: Option<String>) -> Option<String>
[INFO] [stderr]    |           ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |   fn ed(x: Option<String>) -> Option<String>
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |   fn butterfly(x: Option<String>) -> Option<String>
[INFO] [stderr]    |                ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/shell.rs:70:11
[INFO] [stderr]    |
[INFO] [stderr] 70 |   fn life(x: Option<String>) -> Option<String>
[INFO] [stderr]    |           ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `"docker" "inspect" "dcbd5a063ab7a30f53b1967300ea32ea597b1ba5c1ee20280c82d5726bb2d745"`
[INFO] running `"docker" "rm" "-f" "dcbd5a063ab7a30f53b1967300ea32ea597b1ba5c1ee20280c82d5726bb2d745"`
[INFO] [stdout] dcbd5a063ab7a30f53b1967300ea32ea597b1ba5c1ee20280c82d5726bb2d745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/springbov/stupid-shell:/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] 652444f5c1d9cb9a9ed2ee2f4ad7cedaf3b2734a8af466e786e0ca105f1d80f5
[INFO] running `"docker" "start" "-a" "652444f5c1d9cb9a9ed2ee2f4ad7cedaf3b2734a8af466e786e0ca105f1d80f5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/stupid_shell-edd942ec15996bcf
[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" "652444f5c1d9cb9a9ed2ee2f4ad7cedaf3b2734a8af466e786e0ca105f1d80f5"`
[INFO] running `"docker" "rm" "-f" "652444f5c1d9cb9a9ed2ee2f4ad7cedaf3b2734a8af466e786e0ca105f1d80f5"`
[INFO] [stdout] 652444f5c1d9cb9a9ed2ee2f4ad7cedaf3b2734a8af466e786e0ca105f1d80f5