[INFO] fetching crate dust-mail 0.4.3...
[INFO] checking dust-mail-0.4.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dust-mail 0.4.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate dust-mail 0.4.3 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dust-mail 0.4.3
[INFO] finished tweaking crates.io crate dust-mail 0.4.3
[INFO] tweaked toml for crates.io crate dust-mail 0.4.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 334 packages
[INFO] [stderr]       Adding aead v0.3.2 (latest: v0.5.2)
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[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
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[INFO] [stderr]       Adding winreg v0.50.0 (latest: v0.52.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enum-as-inner v0.5.1
[INFO] [stderr]   Downloaded async-std-resolver v0.22.0
[INFO] [stderr]   Downloaded stop-token v0.7.0
[INFO] [stderr]   Downloaded gethostname v0.2.3
[INFO] [stderr]   Downloaded byte-pool v0.2.4
[INFO] [stderr]   Downloaded ammonia v3.3.0
[INFO] [stderr]   Downloaded imap-proto v0.16.4
[INFO] [stderr]   Downloaded async-imap v0.8.0
[INFO] [stderr]   Downloaded async-pop v1.1.1
[INFO] [stderr]   Downloaded async-smtp v0.9.1
[INFO] [stderr]   Downloaded autoconfig v0.4.0
[INFO] [stderr]   Downloaded async-native-tls v0.5.0
[INFO] [stderr]   Downloaded dns-mail-discover v0.2.7
[INFO] [stderr]   Downloaded email v0.0.21
[INFO] [stderr]   Downloaded maildir v0.6.4
[INFO] [stderr]   Downloaded mailparse v0.14.1
[INFO] [stderr]   Downloaded trust-dns-proto v0.22.0
[INFO] [stderr]   Downloaded trust-dns-resolver v0.22.0
[INFO] [stderr]   Downloaded charset v0.1.3
[INFO] [stderr]   Downloaded quoted_printable v0.5.0
[INFO] [stderr]   Downloaded serde-xml-rs v0.6.0
[INFO] [stderr]   Downloaded ms-autodiscover v0.3.3
[INFO] [stderr]   Downloaded async-recursion v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba104cfda247d40961fdcd32a59bde1448c55d50301e606aa504efd881a6763c
[INFO] running `Command { std: "docker" "start" "-a" "ba104cfda247d40961fdcd32a59bde1448c55d50301e606aa504efd881a6763c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba104cfda247d40961fdcd32a59bde1448c55d50301e606aa504efd881a6763c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba104cfda247d40961fdcd32a59bde1448c55d50301e606aa504efd881a6763c", kill_on_drop: false }`
[INFO] [stdout] ba104cfda247d40961fdcd32a59bde1448c55d50301e606aa504efd881a6763c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd13d85622d2a9c0287a352673bb8e364961a6389acc5d959d2b2ac94aab8a07
[INFO] running `Command { std: "docker" "start" "-a" "dd13d85622d2a9c0287a352673bb8e364961a6389acc5d959d2b2ac94aab8a07", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
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[INFO] [stderr]    Compiling ouroboros_macro v0.15.6
[INFO] [stderr]     Checking wasm-bindgen v0.2.92
[INFO] [stderr]     Checking validator v0.16.1
[INFO] [stderr]     Checking polling v3.6.0
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking trust-dns-proto v0.22.0
[INFO] [stderr]     Checking async-io v2.3.2
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking ouroboros v0.15.6
[INFO] [stderr]     Checking async-global-executor v2.4.1
[INFO] [stderr]     Checking async-imap v0.8.0
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking ammonia v3.3.0
[INFO] [stderr]     Checking async-native-tls v0.5.0
[INFO] [stderr]     Checking async-pop v1.1.1
[INFO] [stderr]     Checking web-sys v0.3.69
[INFO] [stderr]     Checking trust-dns-resolver v0.22.0
[INFO] [stderr]     Checking dns-mail-discover v0.2.7
[INFO] [stderr]     Checking http-client v6.5.3
[INFO] [stderr]     Checking surf v2.3.2
[INFO] [stderr]     Checking autoconfig v0.4.0
[INFO] [stderr]     Checking ms-autodiscover v0.3.3
[INFO] [stderr]     Checking dust-mail v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `async_smtp` is imported redundantly
[INFO] [stdout]   --> src/client/outgoing/smtp/mod.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | use async_smtp::{self, authentication::Mechanism, SmtpTransport};
[INFO] [stdout]    |                  ^^^^ the item `async_smtp` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `autoconfig` is imported redundantly
[INFO] [stdout]  --> src/discover/parse.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 | use autoconfig::{self, config};
[INFO] [stdout]   |                  ^^^^ the item `autoconfig` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `async_smtp` is imported redundantly
[INFO] [stdout]   --> src/client/outgoing/smtp/mod.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | use async_smtp::{self, authentication::Mechanism, SmtpTransport};
[INFO] [stdout]    |                  ^^^^ the item `async_smtp` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `autoconfig` is imported redundantly
[INFO] [stdout]  --> src/discover/parse.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 | use autoconfig::{self, config};
[INFO] [stdout]   |                  ^^^^ the item `autoconfig` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.68s
[INFO] running `Command { std: "docker" "inspect" "dd13d85622d2a9c0287a352673bb8e364961a6389acc5d959d2b2ac94aab8a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd13d85622d2a9c0287a352673bb8e364961a6389acc5d959d2b2ac94aab8a07", kill_on_drop: false }`
[INFO] [stdout] dd13d85622d2a9c0287a352673bb8e364961a6389acc5d959d2b2ac94aab8a07