[INFO] fetching crate etwin_mailer 0.10.0...
[INFO] documenting etwin_mailer-0.10.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate etwin_mailer 0.10.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate etwin_mailer 0.10.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate etwin_mailer 0.10.0
[INFO] finished tweaking crates.io crate etwin_mailer 0.10.0
[INFO] tweaked toml for crates.io crate etwin_mailer 0.10.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a62e4582a382f9737e08ec0ae4544304bf90de6a26d4143ba1ac194e7bcf3f9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2a62e4582a382f9737e08ec0ae4544304bf90de6a26d4143ba1ac194e7bcf3f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a62e4582a382f9737e08ec0ae4544304bf90de6a26d4143ba1ac194e7bcf3f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a62e4582a382f9737e08ec0ae4544304bf90de6a26d4143ba1ac194e7bcf3f9", kill_on_drop: false }`
[INFO] [stdout] 2a62e4582a382f9737e08ec0ae4544304bf90de6a26d4143ba1ac194e7bcf3f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 64df95a85daa9ea4e83b1ea196a2d93e03e58f9742a9d9e633a824a102f89f41
[INFO] running `Command { std: "docker" "start" "-a" "64df95a85daa9ea4e83b1ea196a2d93e03e58f9742a9d9e633a824a102f89f41", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking unicode-bidi v0.3.8
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking quoted_printable v0.4.5
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking email-encoding v0.1.0
[INFO] [stderr]     Checking rustls-pemfile v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking futures-util v0.3.21
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking mio v0.8.3
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.22.3
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling enum-iterator-derive v0.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling auto_impl v0.5.0
[INFO] [stderr]     Checking enum-iterator v0.7.0
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking tokio-rustls v0.23.4
[INFO] [stderr]     Checking lettre v0.10.0-rc.6
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking etwin_serde_tools v0.10.0
[INFO] [stderr]     Checking etwin_core v0.10.0
[INFO] [stderr]  Documenting etwin_mailer v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0053]: method `display` has an incompatible type for trait
[INFO] [stdout]   --> src/smtp.rs:53:24
[INFO] [stdout]    |
[INFO] [stdout] 53 |   fn display(&self) -> String {
[INFO] [stdout]    |                        ^^^^^^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        expected struct `lettre::message::header::HeaderValue`, found struct `std::string::String`
[INFO] [stdout]    |                        help: change the output type to match the trait: `lettre::message::header::HeaderValue`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected fn pointer `fn(&smtp::PmMessageStream) -> lettre::message::header::HeaderValue`
[INFO] [stdout]               found fn pointer `fn(&smtp::PmMessageStream) -> std::string::String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `etwin_mailer`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name etwin_mailer src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="html"' --cfg 'feature="json"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=fab17b39c9acaa8e -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-f2eb86ea0bdcf4b8.so --extern etwin_core=/opt/rustwide/target/debug/deps/libetwin_core-38bbbf6addfba59f.rmeta --extern lettre=/opt/rustwide/target/debug/deps/liblettre-68727eefcf029e8f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-c13d80d12b37a4c4.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-e53ee07c9645f27d.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-d7f62ef1c11ad39e.rmeta --cap-lints=warn --crate-version 0.10.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "64df95a85daa9ea4e83b1ea196a2d93e03e58f9742a9d9e633a824a102f89f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64df95a85daa9ea4e83b1ea196a2d93e03e58f9742a9d9e633a824a102f89f41", kill_on_drop: false }`
[INFO] [stdout] 64df95a85daa9ea4e83b1ea196a2d93e03e58f9742a9d9e633a824a102f89f41