[INFO] updating cached repository sudarshan-reddy/gitfu
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sudarshan-reddy/gitfu
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sudarshan-reddy/gitfu" "work/ex/beta-1.38-1/sources/1.37.0/gh/sudarshan-reddy/gitfu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sudarshan-reddy/gitfu'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sudarshan-reddy/gitfu" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sudarshan-reddy/gitfu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sudarshan-reddy/gitfu'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d52fa2bb68fc6c1ea1d8025b1cc6145824235e3
[INFO] sha for GitHub repo sudarshan-reddy/gitfu: 0d52fa2bb68fc6c1ea1d8025b1cc6145824235e3
[INFO] validating manifest of sudarshan-reddy/gitfu 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 sudarshan-reddy/gitfu 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 sudarshan-reddy/gitfu
[INFO] finished frobbing sudarshan-reddy/gitfu
[INFO] frobbed toml for sudarshan-reddy/gitfu written to work/ex/beta-1.38-1/sources/1.37.0/gh/sudarshan-reddy/gitfu/Cargo.toml
[INFO] started frobbing sudarshan-reddy/gitfu
[INFO] finished frobbing sudarshan-reddy/gitfu
[INFO] frobbed toml for sudarshan-reddy/gitfu written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sudarshan-reddy/gitfu/Cargo.toml
[INFO] crate sudarshan-reddy/gitfu 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sudarshan-reddy/gitfu 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sudarshan-reddy/gitfu:/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] 62296789320c12ce2c681336952929c63600e119f67ef70452235d6278a2555e
[INFO] running `"docker" "start" "-a" "62296789320c12ce2c681336952929c63600e119f67ef70452235d6278a2555e"`
[INFO] [stderr]    Compiling ascii_utils v0.9.3
[INFO] [stderr]    Compiling curl-sys v0.4.18
[INFO] [stderr]    Compiling email v0.0.20
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling fast_chemail v0.9.6
[INFO] [stderr]    Compiling lettre v0.9.1
[INFO] [stderr]    Compiling lettre_email v0.9.1
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lettre_email-0.9.1/src/lib.rs:139:66
[INFO] [stderr]     |
[INFO] [stderr] 139 |         self.header(("Content-Type", format!("{}", content_type).as_ref()))
[INFO] [stderr]     |                                                                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `lettre_email`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "62296789320c12ce2c681336952929c63600e119f67ef70452235d6278a2555e"`
[INFO] running `"docker" "rm" "-f" "62296789320c12ce2c681336952929c63600e119f67ef70452235d6278a2555e"`
[INFO] [stdout] 62296789320c12ce2c681336952929c63600e119f67ef70452235d6278a2555e