[INFO] fetching crate temp_mail 0.1.6...
[INFO] testing temp_mail-0.1.6 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate temp_mail 0.1.6 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate temp_mail 0.1.6
[INFO] finished tweaking crates.io crate temp_mail 0.1.6
[INFO] tweaked toml for crates.io crate temp_mail 0.1.6 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate temp_mail 0.1.6 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 180 packages to latest compatible versions
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.23)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf05113343515cc0f92c666fa1795e31730725568f00c9dcb983d2754b7a5fbf
[INFO] running `Command { std: "docker" "start" "-a" "bf05113343515cc0f92c666fa1795e31730725568f00c9dcb983d2754b7a5fbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf05113343515cc0f92c666fa1795e31730725568f00c9dcb983d2754b7a5fbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf05113343515cc0f92c666fa1795e31730725568f00c9dcb983d2754b7a5fbf", kill_on_drop: false }`
[INFO] [stdout] bf05113343515cc0f92c666fa1795e31730725568f00c9dcb983d2754b7a5fbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4fd64ab3f755c868a2ad4ca4a2cc9b5ed00d701d70be4066d8d96a442b42e86
[INFO] running `Command { std: "docker" "start" "-a" "e4fd64ab3f755c868a2ad4ca4a2cc9b5ed00d701d70be4066d8d96a442b42e86", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.3.27
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling temp_mail v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:175:13
[INFO] [stdout]     |
[INFO] [stdout] 175 |             file.write_all(&item?);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 175 |             let _ = file.write_all(&item?);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.64s
[INFO] running `Command { std: "docker" "inspect" "e4fd64ab3f755c868a2ad4ca4a2cc9b5ed00d701d70be4066d8d96a442b42e86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4fd64ab3f755c868a2ad4ca4a2cc9b5ed00d701d70be4066d8d96a442b42e86", kill_on_drop: false }`
[INFO] [stdout] e4fd64ab3f755c868a2ad4ca4a2cc9b5ed00d701d70be4066d8d96a442b42e86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9b8a7ec8577acec62bc6262b7c0d466d5f020e56ba17eef8b2c6f9a866aca15
[INFO] running `Command { std: "docker" "start" "-a" "a9b8a7ec8577acec62bc6262b7c0d466d5f020e56ba17eef8b2c6f9a866aca15", kill_on_drop: false }`
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:175:13
[INFO] [stdout]     |
[INFO] [stdout] 175 |             file.write_all(&item?);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 175 |             let _ = file.write_all(&item?);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling temp_mail v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:175:13
[INFO] [stdout]     |
[INFO] [stdout] 175 |             file.write_all(&item?);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 175 |             let _ = file.write_all(&item?);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "a9b8a7ec8577acec62bc6262b7c0d466d5f020e56ba17eef8b2c6f9a866aca15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9b8a7ec8577acec62bc6262b7c0d466d5f020e56ba17eef8b2c6f9a866aca15", kill_on_drop: false }`
[INFO] [stdout] a9b8a7ec8577acec62bc6262b7c0d466d5f020e56ba17eef8b2c6f9a866aca15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fda48ee0d6edc593fffba6bd97f7881c5b92859d98b2ed53633fda262fca6cf1
[INFO] running `Command { std: "docker" "start" "-a" "fda48ee0d6edc593fffba6bd97f7881c5b92859d98b2ed53633fda262fca6cf1", kill_on_drop: false }`
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:175:13
[INFO] [stderr]     |
[INFO] [stderr] 175 |             file.write_all(&item?);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 175 |             let _ = file.write_all(&item?);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `temp_mail` (lib) generated 1 warning
[INFO] [stderr] warning: `temp_mail` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/temp_mail-9db8d58b3d0589dd)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests temp_mail
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fda48ee0d6edc593fffba6bd97f7881c5b92859d98b2ed53633fda262fca6cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fda48ee0d6edc593fffba6bd97f7881c5b92859d98b2ed53633fda262fca6cf1", kill_on_drop: false }`
[INFO] [stdout] fda48ee0d6edc593fffba6bd97f7881c5b92859d98b2ed53633fda262fca6cf1