[INFO] updating cached repository https://github.com/euclio/travis-cargo-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b7e66fd9122ff0e6f8e44bec93cab03b23225d73
[INFO] testing euclio/travis-cargo-rust against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuclio%2Ftravis-cargo-rust" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/euclio/travis-cargo-rust on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/euclio/travis-cargo-rust
[INFO] finished tweaking git repo https://github.com/euclio/travis-cargo-rust
[INFO] tweaked toml for git repo https://github.com/euclio/travis-cargo-rust written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/euclio/travis-cargo-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 1676df39dd7fb76fdf7ee43681f15e725729d403b47179b4bbb43c3486541359
[INFO] running `"docker" "start" "-a" "1676df39dd7fb76fdf7ee43681f15e725729d403b47179b4bbb43c3486541359"`
[INFO] [stderr]    Compiling regex-syntax v0.1.3
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling aho-corasick v0.2.2
[INFO] [stderr]    Compiling regex v0.1.38
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling travis-cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: `&&[std::string::String]` is not an iterator
[INFO] [stderr]    --> src/coverage.rs:209:75
[INFO] [stderr]     |
[INFO] [stderr] 209 |     let output = utils::run_output(Command::new("cargo").arg("test").args(&test_args));
[INFO] [stderr]     |                                                                           ^^^^^^^^^^ `&&[std::string::String]` is not an iterator
[INFO] [stderr]     |
[INFO] [stderr]     = help: the trait `std::iter::Iterator` is not implemented for `&&[std::string::String]`
[INFO] [stderr]     = note: required because of the requirements on the impl of `std::iter::IntoIterator` for `&&[std::string::String]`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `travis-cargo`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1676df39dd7fb76fdf7ee43681f15e725729d403b47179b4bbb43c3486541359"`
[INFO] running `"docker" "rm" "-f" "1676df39dd7fb76fdf7ee43681f15e725729d403b47179b4bbb43c3486541359"`
[INFO] [stdout] 1676df39dd7fb76fdf7ee43681f15e725729d403b47179b4bbb43c3486541359