[INFO] updating cached repository luxn/tasci
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/luxn/tasci
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/luxn/tasci" "work/ex/beta-1.38-1/sources/1.37.0/gh/luxn/tasci"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/luxn/tasci'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/luxn/tasci" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/luxn/tasci"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/luxn/tasci'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7037bdf63502d8d3bb99d915c9f868d2405278e8
[INFO] sha for GitHub repo luxn/tasci: 7037bdf63502d8d3bb99d915c9f868d2405278e8
[INFO] validating manifest of luxn/tasci 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 luxn/tasci 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 luxn/tasci
[INFO] finished frobbing luxn/tasci
[INFO] frobbed toml for luxn/tasci written to work/ex/beta-1.38-1/sources/1.37.0/gh/luxn/tasci/Cargo.toml
[INFO] started frobbing luxn/tasci
[INFO] finished frobbing luxn/tasci
[INFO] frobbed toml for luxn/tasci written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/luxn/tasci/Cargo.toml
[INFO] crate luxn/tasci 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 luxn/tasci 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/luxn/tasci:/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] bbd636ec323b0df8e91da138722a1a026bc00e6e26f68feea240d844b2cd510f
[INFO] running `"docker" "start" "-a" "bbd636ec323b0df8e91da138722a1a026bc00e6e26f68feea240d844b2cd510f"`
[INFO] [stderr]    Compiling version_check v0.1.4
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[INFO] [stderr]    Compiling block-cipher-trait v0.5.3
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[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling tokio-uds v0.2.1
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[INFO] [stderr]    Compiling tokio-tcp v0.1.1
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[INFO] [stderr]    Compiling bcrypt v0.2.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling diesel_derives v1.3.0
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.8
[INFO] [stderr]    Compiling parking_lot v0.7.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling crossbeam-channel v0.3.4
[INFO] [stderr]    Compiling handlebars v1.1.0
[INFO] [stderr]    Compiling markdown v0.2.0
[INFO] [stderr]    Compiling diesel v1.3.3
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling actix_derive v0.3.0
[INFO] [stderr]    Compiling lettre v0.8.3
[INFO] [stderr]    Compiling snowflake v1.3.0
[INFO] [stderr]    Compiling jsonwebtoken v5.0.1
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling trust-dns-proto v0.6.1
[INFO] [stderr]    Compiling trust-dns-proto v0.5.0
[INFO] [stderr]    Compiling geo v0.11.0
[INFO] [stderr]    Compiling dotenv v0.13.0
[INFO] [stderr]    Compiling lettre_email v0.8.3
[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-0.8.3/src/lib.rs:387:70
[INFO] [stderr]     |
[INFO] [stderr] 387 |         self.add_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" "bbd636ec323b0df8e91da138722a1a026bc00e6e26f68feea240d844b2cd510f"`
[INFO] running `"docker" "rm" "-f" "bbd636ec323b0df8e91da138722a1a026bc00e6e26f68feea240d844b2cd510f"`
[INFO] [stdout] bbd636ec323b0df8e91da138722a1a026bc00e6e26f68feea240d844b2cd510f