[INFO] crate mandrill_sender 0.1.0 is already in cache
[INFO] checking mandrill_sender-0.1.0 against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] extracting crate mandrill_sender 0.1.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate mandrill_sender 0.1.0 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 crates.io crate mandrill_sender 0.1.0
[INFO] finished tweaking crates.io crate mandrill_sender 0.1.0
[INFO] tweaked toml for crates.io crate mandrill_sender 0.1.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] bdd6ceb9a3e91182579c8b5be2efd1ee617e3d50b10f80cdec4d1d2f5e53ba7e
[INFO] running `"docker" "start" "-a" "bdd6ceb9a3e91182579c8b5be2efd1ee617e3d50b10f80cdec4d1d2f5e53ba7e"`
[INFO] [stderr]     Checking serde_urlencoded v0.3.0
[INFO] [stderr]     Checking reqwest v0.1.0
[INFO] [stderr]     Checking mandrill_sender v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/email.rs:93:15
[INFO] [stderr]    |
[INFO] [stderr] 93 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]    |               ----^^^^^^^^^^^^^
[INFO] [stderr]    |               |
[INFO] [stderr]    |               help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:148:15
[INFO] [stderr]     |
[INFO] [stderr] 148 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:186:15
[INFO] [stderr]     |
[INFO] [stderr] 186 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:241:15
[INFO] [stderr]     |
[INFO] [stderr] 241 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/email.rs:93:15
[INFO] [stderr]    |
[INFO] [stderr] 93 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]    |               ----^^^^^^^^^^^^^
[INFO] [stderr]    |               |
[INFO] [stderr]    |               help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:148:15
[INFO] [stderr]     |
[INFO] [stderr] 148 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:186:15
[INFO] [stderr]     |
[INFO] [stderr] 186 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/email.rs:241:15
[INFO] [stderr]     |
[INFO] [stderr] 241 |           let mut response_body = &mut "".to_owned();
[INFO] [stderr]     |               ----^^^^^^^^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.12s
[INFO] running `"docker" "inspect" "bdd6ceb9a3e91182579c8b5be2efd1ee617e3d50b10f80cdec4d1d2f5e53ba7e"`
[INFO] running `"docker" "rm" "-f" "bdd6ceb9a3e91182579c8b5be2efd1ee617e3d50b10f80cdec4d1d2f5e53ba7e"`
[INFO] [stdout] bdd6ceb9a3e91182579c8b5be2efd1ee617e3d50b10f80cdec4d1d2f5e53ba7e