[INFO] fetching crate mailchecker 6.0.9...
[INFO] checking mailchecker-6.0.9 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate mailchecker 6.0.9 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate mailchecker 6.0.9 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mailchecker 6.0.9
[INFO] finished tweaking crates.io crate mailchecker 6.0.9
[INFO] tweaked toml for crates.io crate mailchecker 6.0.9 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate mailchecker 6.0.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5eb7a1b3b9ebf7a5e34fb7cb7af16b697beb9483eb13a22d38b05d3869075fa4
[INFO] running `Command { std: "docker" "start" "-a" "5eb7a1b3b9ebf7a5e34fb7cb7af16b697beb9483eb13a22d38b05d3869075fa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5eb7a1b3b9ebf7a5e34fb7cb7af16b697beb9483eb13a22d38b05d3869075fa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5eb7a1b3b9ebf7a5e34fb7cb7af16b697beb9483eb13a22d38b05d3869075fa4", kill_on_drop: false }`
[INFO] [stdout] 5eb7a1b3b9ebf7a5e34fb7cb7af16b697beb9483eb13a22d38b05d3869075fa4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 984c0ec57d1dddec759c1ffd7359e02bcaabbae1de8c5fa329f20fb978bb6a46
[INFO] running `Command { std: "docker" "start" "-a" "984c0ec57d1dddec759c1ffd7359e02bcaabbae1de8c5fa329f20fb978bb6a46", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking ascii_utils v0.9.3
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]     Checking fast_chemail v0.9.6
[INFO] [stderr]     Checking pretty_assertions v0.1.2
[INFO] [stderr]     Checking mailchecker v6.0.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `ExtendedIterator` is never used
[INFO] [stdout]    --> src/lib.rs:138:7
[INFO] [stdout]     |
[INFO] [stdout] 138 | trait ExtendedIterator: Iterator {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:79:39
[INFO] [stdout]    |
[INFO] [stdout] 79 |     .fold(vec![String::from(domains[0].clone())], |v, domain_part| {
[INFO] [stdout]    |                                       ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExtendedIterator` is never used
[INFO] [stdout]    --> src/lib.rs:138:7
[INFO] [stdout]     |
[INFO] [stdout] 138 | trait ExtendedIterator: Iterator {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:79:39
[INFO] [stdout]    |
[INFO] [stdout] 79 |     .fold(vec![String::from(domains[0].clone())], |v, domain_part| {
[INFO] [stdout]    |                                       ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "984c0ec57d1dddec759c1ffd7359e02bcaabbae1de8c5fa329f20fb978bb6a46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "984c0ec57d1dddec759c1ffd7359e02bcaabbae1de8c5fa329f20fb978bb6a46", kill_on_drop: false }`
[INFO] [stdout] 984c0ec57d1dddec759c1ffd7359e02bcaabbae1de8c5fa329f20fb978bb6a46