[INFO] updating cached repository https://github.com/nurelin/rust2email
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 264a266117ae7b750223d6eae07ed5adca854d64
[INFO] checking nurelin/rust2email against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnurelin%2Frust2email" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nurelin/rust2email on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nurelin/rust2email
[INFO] finished tweaking git repo https://github.com/nurelin/rust2email
[INFO] tweaked toml for git repo https://github.com/nurelin/rust2email written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/nurelin/rust2email already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ac85c2e495cf003a0e5e226bf01bab643a4776d2a9145812e30463c2734c5a6b
[INFO] running `"docker" "start" "-a" "ac85c2e495cf003a0e5e226bf01bab643a4776d2a9145812e30463c2734c5a6b"`
[INFO] [stderr]    Compiling derive_builder v0.5.0
[INFO] [stderr]     Checking encoding_rs v0.6.11
[INFO] [stderr]     Checking utf-8 v0.6.0
[INFO] [stderr]    Compiling syn v0.9.2
[INFO] [stderr]     Checking slog-scope v3.0.0
[INFO] [stderr]     Checking toml v0.4.5
[INFO] [stderr]    Compiling email v0.0.18
[INFO] [stderr]     Checking trackable v0.2.8
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]    Compiling string_cache v0.2.29
[INFO] [stderr]     Checking backtrace-sys v0.1.16
[INFO] [stderr]    Compiling derive_builder_core v0.1.7
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking slog-stdlog v2.0.0
[INFO] [stderr]     Checking tendril v0.2.4
[INFO] [stderr]     Checking backtrace v0.3.3
[INFO] [stderr]     Checking backtrace v0.2.3
[INFO] [stderr]     Checking native-tls v0.1.4
[INFO] [stderr]     Checking slog-term v2.2.0
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]    Compiling string_cache v0.3.0
[INFO] [stderr]    Compiling html5ever-atoms v0.1.3
[INFO] [stderr]     Checking tokio-tls v0.1.3
[INFO] [stderr]     Checking sloggers v0.2.1
[INFO] [stderr]     Checking quick-xml v0.8.1
[INFO] [stderr]     Checking quick-xml v0.7.3
[INFO] [stderr]     Checking hyper-tls v0.1.2
[INFO] [stderr]     Checking lettre v0.7.0
[INFO] [stderr]     Checking rss v0.7.0
[INFO] [stderr]     Checking atom_syndication v0.5.5
[INFO] [stderr]     Checking reqwest v0.7.3
[INFO] [stderr]    Compiling html5ever v0.9.0
[INFO] [stderr]     Checking lettre_email v0.7.0
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lettre_email-0.7.0/src/lib.rs:444:70
[INFO] [stderr]     |
[INFO] [stderr] 444 |         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" "ac85c2e495cf003a0e5e226bf01bab643a4776d2a9145812e30463c2734c5a6b"`
[INFO] running `"docker" "rm" "-f" "ac85c2e495cf003a0e5e226bf01bab643a4776d2a9145812e30463c2734c5a6b"`
[INFO] [stdout] ac85c2e495cf003a0e5e226bf01bab643a4776d2a9145812e30463c2734c5a6b