[INFO] updating cached repository mattmac4241/po-tweet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mattmac4241/po-tweet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mattmac4241/po-tweet" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/mattmac4241/po-tweet"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/mattmac4241/po-tweet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mattmac4241/po-tweet" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/mattmac4241/po-tweet"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/mattmac4241/po-tweet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 217cd5c078fc4a761c64183b5380513aa4e6d69e
[INFO] sha for GitHub repo mattmac4241/po-tweet: 217cd5c078fc4a761c64183b5380513aa4e6d69e
[INFO] validating manifest of mattmac4241/po-tweet on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mattmac4241/po-tweet on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mattmac4241/po-tweet
[INFO] finished frobbing mattmac4241/po-tweet
[INFO] frobbed toml for mattmac4241/po-tweet written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/mattmac4241/po-tweet/Cargo.toml
[INFO] started frobbing mattmac4241/po-tweet
[INFO] finished frobbing mattmac4241/po-tweet
[INFO] frobbed toml for mattmac4241/po-tweet written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/mattmac4241/po-tweet/Cargo.toml
[INFO] crate mattmac4241/po-tweet already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mattmac4241/po-tweet against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-5/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/mattmac4241/po-tweet:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8c90f2b9c84107df2157e0dfcf60e7d09c8260c7147ca14850bc98b987706ae1
[INFO] running `"docker" "start" "-a" "8c90f2b9c84107df2157e0dfcf60e7d09c8260c7147ca14850bc98b987706ae1"`
[INFO] [stderr] warning: dependency (rocket_contrib) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling ring v0.3.1
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling syn v0.10.6
[INFO] [stderr]    Compiling rocket_codegen v0.1.5
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr] error[E0277]: `&&std::vec::Vec<std::string::String>` is not an iterator
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/ring-0.3.1/build.rs:206:14
[INFO] [stderr]     |
[INFO] [stderr] 206 |             .args(&args)
[INFO] [stderr]     |              ^^^^ `&&std::vec::Vec<std::string::String>` is not an iterator
[INFO] [stderr]     |
[INFO] [stderr]     = help: the trait `std::iter::Iterator` is not implemented for `&&std::vec::Vec<std::string::String>`
[INFO] [stderr]     = note: required because of the requirements on the impl of `std::iter::IntoIterator` for `&&std::vec::Vec<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 `ring`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8c90f2b9c84107df2157e0dfcf60e7d09c8260c7147ca14850bc98b987706ae1"`
[INFO] running `"docker" "rm" "-f" "8c90f2b9c84107df2157e0dfcf60e7d09c8260c7147ca14850bc98b987706ae1"`
[INFO] [stdout] 8c90f2b9c84107df2157e0dfcf60e7d09c8260c7147ca14850bc98b987706ae1