[INFO] crate mandrill_sender 0.1.0 is already in cache
[INFO] extracting crate mandrill_sender 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/mandrill_sender/0.1.0
[INFO] extracting crate mandrill_sender 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mandrill_sender/0.1.0
[INFO] validating manifest of mandrill_sender-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mandrill_sender-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mandrill_sender-0.1.0
[INFO] finished frobbing mandrill_sender-0.1.0
[INFO] frobbed toml for mandrill_sender-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/mandrill_sender/0.1.0/Cargo.toml
[INFO] started frobbing mandrill_sender-0.1.0
[INFO] finished frobbing mandrill_sender-0.1.0
[INFO] frobbed toml for mandrill_sender-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mandrill_sender/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mandrill_sender-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/mandrill_sender/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] d67eb446dbda9ce3ca1fb56a0b63070f2f59883aaeb64582c49d295ed978e812
[INFO] running `"docker" "start" "-a" "d67eb446dbda9ce3ca1fb56a0b63070f2f59883aaeb64582c49d295ed978e812"`
[INFO] [stderr]    Compiling serde_urlencoded v0.3.0
[INFO] [stderr]    Compiling reqwest v0.1.0
[INFO] [stderr]    Compiling mandrill_sender v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `"docker" "inspect" "d67eb446dbda9ce3ca1fb56a0b63070f2f59883aaeb64582c49d295ed978e812"`
[INFO] running `"docker" "rm" "-f" "d67eb446dbda9ce3ca1fb56a0b63070f2f59883aaeb64582c49d295ed978e812"`
[INFO] [stdout] d67eb446dbda9ce3ca1fb56a0b63070f2f59883aaeb64582c49d295ed978e812
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/mandrill_sender/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 06e6dc944f9fcc340d0211a8ff4f9e6851918a118ef0c9ed346a62eb8f497562
[INFO] running `"docker" "start" "-a" "06e6dc944f9fcc340d0211a8ff4f9e6851918a118ef0c9ed346a62eb8f497562"`
[INFO] [stderr]    Compiling mandrill_sender v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "06e6dc944f9fcc340d0211a8ff4f9e6851918a118ef0c9ed346a62eb8f497562"`
[INFO] running `"docker" "rm" "-f" "06e6dc944f9fcc340d0211a8ff4f9e6851918a118ef0c9ed346a62eb8f497562"`
[INFO] [stdout] 06e6dc944f9fcc340d0211a8ff4f9e6851918a118ef0c9ed346a62eb8f497562
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/mandrill_sender/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 6592adf97720e355935fa2c348f519f1e648e862dcc04760d934cbd1b57fa69c
[INFO] running `"docker" "start" "-a" "6592adf97720e355935fa2c348f519f1e648e862dcc04760d934cbd1b57fa69c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mandrill_sender-bc892f2e38f07ed1
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mandrill_sender
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6592adf97720e355935fa2c348f519f1e648e862dcc04760d934cbd1b57fa69c"`
[INFO] running `"docker" "rm" "-f" "6592adf97720e355935fa2c348f519f1e648e862dcc04760d934cbd1b57fa69c"`
[INFO] [stdout] 6592adf97720e355935fa2c348f519f1e648e862dcc04760d934cbd1b57fa69c