[INFO] updating cached repository saarw/cstruct2rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/saarw/cstruct2rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/saarw/cstruct2rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/saarw/cstruct2rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/saarw/cstruct2rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/saarw/cstruct2rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/saarw/cstruct2rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/saarw/cstruct2rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8e53895724d6e22da6056430e8dab2ef9661f9ac
[INFO] sha for GitHub repo saarw/cstruct2rs: 8e53895724d6e22da6056430e8dab2ef9661f9ac
[INFO] validating manifest of saarw/cstruct2rs 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 saarw/cstruct2rs 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 saarw/cstruct2rs
[INFO] finished frobbing saarw/cstruct2rs
[INFO] frobbed toml for saarw/cstruct2rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/saarw/cstruct2rs/Cargo.toml
[INFO] started frobbing saarw/cstruct2rs
[INFO] finished frobbing saarw/cstruct2rs
[INFO] frobbed toml for saarw/cstruct2rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/saarw/cstruct2rs/Cargo.toml
[INFO] crate saarw/cstruct2rs 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 saarw/cstruct2rs 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-5/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/saarw/cstruct2rs:/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] f7aecb4fc62db8161459b56fb6a8e549cd5a93f3205c2ae940333f16474c23d3
[INFO] running `"docker" "start" "-a" "f7aecb4fc62db8161459b56fb6a8e549cd5a93f3205c2ae940333f16474c23d3"`
[INFO] [stderr]    Compiling cstruct2rs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/cinfo.rs:90:6
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let mut name_buf: Cow<String>;
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/cinfo.rs:91:6
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let mut var_name: Cow<str>;    
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.61s
[INFO] running `"docker" "inspect" "f7aecb4fc62db8161459b56fb6a8e549cd5a93f3205c2ae940333f16474c23d3"`
[INFO] running `"docker" "rm" "-f" "f7aecb4fc62db8161459b56fb6a8e549cd5a93f3205c2ae940333f16474c23d3"`
[INFO] [stdout] f7aecb4fc62db8161459b56fb6a8e549cd5a93f3205c2ae940333f16474c23d3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/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/saarw/cstruct2rs:/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] ee5b834ce202bdaafd858c5ffd851188deed635b1deafa8a6a02065d28e37d56
[INFO] running `"docker" "start" "-a" "ee5b834ce202bdaafd858c5ffd851188deed635b1deafa8a6a02065d28e37d56"`
[INFO] [stderr]    Compiling cstruct2rs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/cinfo.rs:90:6
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let mut name_buf: Cow<String>;
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/cinfo.rs:91:6
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let mut var_name: Cow<str>;    
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `"docker" "inspect" "ee5b834ce202bdaafd858c5ffd851188deed635b1deafa8a6a02065d28e37d56"`
[INFO] running `"docker" "rm" "-f" "ee5b834ce202bdaafd858c5ffd851188deed635b1deafa8a6a02065d28e37d56"`
[INFO] [stdout] ee5b834ce202bdaafd858c5ffd851188deed635b1deafa8a6a02065d28e37d56
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/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/saarw/cstruct2rs:/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] 7c01ffc691226397d7b02d25e4643174c06ecd8c801299f8c1ee0474c529ea1d
[INFO] running `"docker" "start" "-a" "7c01ffc691226397d7b02d25e4643174c06ecd8c801299f8c1ee0474c529ea1d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cstruct2rs-6102bad6b4750ec5
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test cinfo::test_parse_fields ... ok
[INFO] [stdout] test test_find_struct_block ... ok
[INFO] [stdout] test test_strip_comments ... ok
[INFO] [stdout] test cinfo::test_extract_name_and_array_pointer_type ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7c01ffc691226397d7b02d25e4643174c06ecd8c801299f8c1ee0474c529ea1d"`
[INFO] running `"docker" "rm" "-f" "7c01ffc691226397d7b02d25e4643174c06ecd8c801299f8c1ee0474c529ea1d"`
[INFO] [stdout] 7c01ffc691226397d7b02d25e4643174c06ecd8c801299f8c1ee0474c529ea1d