[INFO] updating cached repository sjeohp/rust-chain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sjeohp/rust-chain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sjeohp/rust-chain" "work/ex/beta-1.38-1/sources/1.37.0/gh/sjeohp/rust-chain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sjeohp/rust-chain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sjeohp/rust-chain" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sjeohp/rust-chain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sjeohp/rust-chain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 11f41327188ffae4ee69e8a60d4a197d1e201581
[INFO] sha for GitHub repo sjeohp/rust-chain: 11f41327188ffae4ee69e8a60d4a197d1e201581
[INFO] validating manifest of sjeohp/rust-chain 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 sjeohp/rust-chain 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 sjeohp/rust-chain
[INFO] finished frobbing sjeohp/rust-chain
[INFO] frobbed toml for sjeohp/rust-chain written to work/ex/beta-1.38-1/sources/1.37.0/gh/sjeohp/rust-chain/Cargo.toml
[INFO] started frobbing sjeohp/rust-chain
[INFO] finished frobbing sjeohp/rust-chain
[INFO] frobbed toml for sjeohp/rust-chain written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sjeohp/rust-chain/Cargo.toml
[INFO] crate sjeohp/rust-chain 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]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sjeohp/rust-chain 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-1/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/sjeohp/rust-chain:/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] a4c87c7435942ca5d0f1fbf7994e78dfde1f137db888104bc75d7886286cfb97
[INFO] running `"docker" "start" "-a" "a4c87c7435942ca5d0f1fbf7994e78dfde1f137db888104bc75d7886286cfb97"`
[INFO] [stderr]    Compiling ring v0.4.3
[INFO] [stderr]    Compiling md5 v0.2.1
[INFO] [stderr]    Compiling serde v0.8.20
[INFO] [stderr]    Compiling untrusted v0.3.1
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling time v0.1.35
[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-0.4.3/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]    Compiling postgres-protocol v0.2.0
[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" "a4c87c7435942ca5d0f1fbf7994e78dfde1f137db888104bc75d7886286cfb97"`
[INFO] running `"docker" "rm" "-f" "a4c87c7435942ca5d0f1fbf7994e78dfde1f137db888104bc75d7886286cfb97"`
[INFO] [stdout] a4c87c7435942ca5d0f1fbf7994e78dfde1f137db888104bc75d7886286cfb97