[INFO] updating cached repository intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 48e8a4eda3c5524b42a376dcad30a64cb38cdf12
[INFO] sha for GitHub repo intrepion/example-x-rust-x-rustbyexample-com-x-std-option: 48e8a4eda3c5524b42a376dcad30a64cb38cdf12
[INFO] validating manifest of intrepion/example-x-rust-x-rustbyexample-com-x-std-option on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of intrepion/example-x-rust-x-rustbyexample-com-x-std-option on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-std-option written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option/Cargo.toml
[INFO] started frobbing intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-std-option
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-std-option written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option/Cargo.toml
[INFO] crate intrepion/example-x-rust-x-rustbyexample-com-x-std-option has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking intrepion/example-x-rust-x-rustbyexample-com-x-std-option against master#6ecad338381cc3b8d56e2df22e5971a598eddd6c for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-6/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/intrepion/example-x-rust-x-rustbyexample-com-x-std-option:/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=forbid" "-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" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 57ca2c5beea0f5c907fa1369891248f4dbeb8ac9d80015c57338d3d0eb526005
[INFO] running `"docker" "start" "-a" "57ca2c5beea0f5c907fa1369891248f4dbeb8ac9d80015c57338d3d0eb526005"`
[INFO] [stderr]     Checking example-x-rust-x-rustbyexample-com-x-std-option v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let none: Option<i32> = None;
[INFO] [stderr]    |         ^^^^ help: consider using `_none` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let none: Option<i32> = None;
[INFO] [stderr]    |         ^^^^ help: consider using `_none` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "57ca2c5beea0f5c907fa1369891248f4dbeb8ac9d80015c57338d3d0eb526005"`
[INFO] running `"docker" "rm" "-f" "57ca2c5beea0f5c907fa1369891248f4dbeb8ac9d80015c57338d3d0eb526005"`
[INFO] [stdout] 57ca2c5beea0f5c907fa1369891248f4dbeb8ac9d80015c57338d3d0eb526005