[INFO] updating cached repository HristoKolev/docker-backup
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/HristoKolev/docker-backup
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/HristoKolev/docker-backup" "work/ex/beta-1.38-1/sources/1.37.0/gh/HristoKolev/docker-backup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/HristoKolev/docker-backup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/HristoKolev/docker-backup" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HristoKolev/docker-backup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HristoKolev/docker-backup'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 35b84d3715761159aa2378feca52a50acc492e22
[INFO] sha for GitHub repo HristoKolev/docker-backup: 35b84d3715761159aa2378feca52a50acc492e22
[INFO] validating manifest of HristoKolev/docker-backup 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 HristoKolev/docker-backup 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 HristoKolev/docker-backup
[INFO] finished frobbing HristoKolev/docker-backup
[INFO] frobbed toml for HristoKolev/docker-backup written to work/ex/beta-1.38-1/sources/1.37.0/gh/HristoKolev/docker-backup/Cargo.toml
[INFO] started frobbing HristoKolev/docker-backup
[INFO] finished frobbing HristoKolev/docker-backup
[INFO] frobbed toml for HristoKolev/docker-backup written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HristoKolev/docker-backup/Cargo.toml
[INFO] crate HristoKolev/docker-backup 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 HristoKolev/docker-backup 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/HristoKolev/docker-backup:/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] 7d47d4fca8350ae0d4c351f84f07f90c45eccf016ce1c1d544052a1e7747f657
[INFO] running `"docker" "start" "-a" "7d47d4fca8350ae0d4c351f84f07f90c45eccf016ce1c1d544052a1e7747f657"`
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling email v0.0.20
[INFO] [stderr]    Compiling im v12.3.4
[INFO] [stderr]    Compiling sentry v0.15.5
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling uname v0.1.1
[INFO] [stderr]    Compiling sized-chunks v0.1.3
[INFO] [stderr]    Compiling mio v0.6.18
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling url_serde v0.2.0
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling lettre v0.9.1
[INFO] [stderr]    Compiling h2 v0.1.20
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling debugid v0.4.0
[INFO] [stderr]    Compiling handlebars v1.1.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling sentry-types v0.11.0
[INFO] [stderr]    Compiling lettre_email v0.9.1
[INFO] [stderr]    Compiling tokio v0.1.20
[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" "7d47d4fca8350ae0d4c351f84f07f90c45eccf016ce1c1d544052a1e7747f657"`
[INFO] running `"docker" "rm" "-f" "7d47d4fca8350ae0d4c351f84f07f90c45eccf016ce1c1d544052a1e7747f657"`
[INFO] [stdout] 7d47d4fca8350ae0d4c351f84f07f90c45eccf016ce1c1d544052a1e7747f657