[INFO] updating cached repository euclio/travis-cargo-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/euclio/travis-cargo-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/euclio/travis-cargo-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/euclio/travis-cargo-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/euclio/travis-cargo-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/euclio/travis-cargo-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/euclio/travis-cargo-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/euclio/travis-cargo-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b7e66fd9122ff0e6f8e44bec93cab03b23225d73
[INFO] sha for GitHub repo euclio/travis-cargo-rust: b7e66fd9122ff0e6f8e44bec93cab03b23225d73
[INFO] validating manifest of euclio/travis-cargo-rust 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 euclio/travis-cargo-rust 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 euclio/travis-cargo-rust
[INFO] finished frobbing euclio/travis-cargo-rust
[INFO] frobbed toml for euclio/travis-cargo-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/euclio/travis-cargo-rust/Cargo.toml
[INFO] started frobbing euclio/travis-cargo-rust
[INFO] finished frobbing euclio/travis-cargo-rust
[INFO] frobbed toml for euclio/travis-cargo-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/euclio/travis-cargo-rust/Cargo.toml
[INFO] crate euclio/travis-cargo-rust 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/euclio/travis-cargo-rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 euclio/travis-cargo-rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/euclio/travis-cargo-rust:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 33d94d661453537717e0a7dfb004d7252757f8b9f092608c8d6c2b680090d1e7
[INFO] running `"docker" "start" "-a" "33d94d661453537717e0a7dfb004d7252757f8b9f092608c8d6c2b680090d1e7"`
[INFO] [stderr]    Compiling regex-syntax v0.1.3
[INFO] [stderr]    Compiling strsim v0.5.2
[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/crater/workdir)
[INFO] [stderr] error[E0277]: `&&[std::string::String]` is not an iterator
[INFO] [stderr]    --> src/coverage.rs:209:70
[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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "33d94d661453537717e0a7dfb004d7252757f8b9f092608c8d6c2b680090d1e7"`
[INFO] running `"docker" "rm" "-f" "33d94d661453537717e0a7dfb004d7252757f8b9f092608c8d6c2b680090d1e7"`
[INFO] [stdout] 33d94d661453537717e0a7dfb004d7252757f8b9f092608c8d6c2b680090d1e7