[INFO] updating cached repository davidpeklak/cargo-stdx-check
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/davidpeklak/cargo-stdx-check
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/davidpeklak/cargo-stdx-check" "work/ex/beta-1.38-1/sources/1.37.0/gh/davidpeklak/cargo-stdx-check"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/davidpeklak/cargo-stdx-check'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/davidpeklak/cargo-stdx-check" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6b0beb957152519476a52be3bba72611dc4064fa
[INFO] sha for GitHub repo davidpeklak/cargo-stdx-check: 6b0beb957152519476a52be3bba72611dc4064fa
[INFO] validating manifest of davidpeklak/cargo-stdx-check 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 davidpeklak/cargo-stdx-check 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 davidpeklak/cargo-stdx-check
[INFO] finished frobbing davidpeklak/cargo-stdx-check
[INFO] frobbed toml for davidpeklak/cargo-stdx-check written to work/ex/beta-1.38-1/sources/1.37.0/gh/davidpeklak/cargo-stdx-check/Cargo.toml
[INFO] started frobbing davidpeklak/cargo-stdx-check
[INFO] finished frobbing davidpeklak/cargo-stdx-check
[INFO] frobbed toml for davidpeklak/cargo-stdx-check written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check/Cargo.toml
[INFO] crate davidpeklak/cargo-stdx-check 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 davidpeklak/cargo-stdx-check against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 27cf1971f0e7f3e35488161e2c7004d7876618d52540c424fcd8aa7404919010
[INFO] running `"docker" "start" "-a" "27cf1971f0e7f3e35488161e2c7004d7876618d52540c424fcd8aa7404919010"`
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling serde v1.0.8
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.8
[INFO] [stderr]    Compiling toml v0.4.2
[INFO] [stderr]    Compiling docopt v0.8.1
[INFO] [stderr]    Compiling backtrace v0.3.2
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling cargo-stdx-check v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:186:13
[INFO] [stderr]     |
[INFO] [stderr] 186 |         let mut set = grouped.entry(name).or_insert(BTreeSet::new());
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.27s
[INFO] running `"docker" "inspect" "27cf1971f0e7f3e35488161e2c7004d7876618d52540c424fcd8aa7404919010"`
[INFO] running `"docker" "rm" "-f" "27cf1971f0e7f3e35488161e2c7004d7876618d52540c424fcd8aa7404919010"`
[INFO] [stdout] 27cf1971f0e7f3e35488161e2c7004d7876618d52540c424fcd8aa7404919010
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2fe0998baadbf3463c2131cc3999f7b714fdffe0ba8ae8d48393d7e1cf8e8121
[INFO] running `"docker" "start" "-a" "2fe0998baadbf3463c2131cc3999f7b714fdffe0ba8ae8d48393d7e1cf8e8121"`
[INFO] [stderr]    Compiling cargo-stdx-check v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:186:13
[INFO] [stderr]     |
[INFO] [stderr] 186 |         let mut set = grouped.entry(name).or_insert(BTreeSet::new());
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "2fe0998baadbf3463c2131cc3999f7b714fdffe0ba8ae8d48393d7e1cf8e8121"`
[INFO] running `"docker" "rm" "-f" "2fe0998baadbf3463c2131cc3999f7b714fdffe0ba8ae8d48393d7e1cf8e8121"`
[INFO] [stdout] 2fe0998baadbf3463c2131cc3999f7b714fdffe0ba8ae8d48393d7e1cf8e8121
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidpeklak/cargo-stdx-check:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 5d300117f9bf0853f69b4cf4efe7d3ed3955a40b25d93b3a9e071aebd8e97fc2
[INFO] running `"docker" "start" "-a" "5d300117f9bf0853f69b4cf4efe7d3ed3955a40b25d93b3a9e071aebd8e97fc2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_stdx_check-5616be89ad9323fc
[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" "5d300117f9bf0853f69b4cf4efe7d3ed3955a40b25d93b3a9e071aebd8e97fc2"`
[INFO] running `"docker" "rm" "-f" "5d300117f9bf0853f69b4cf4efe7d3ed3955a40b25d93b3a9e071aebd8e97fc2"`
[INFO] [stdout] 5d300117f9bf0853f69b4cf4efe7d3ed3955a40b25d93b3a9e071aebd8e97fc2