[INFO] crate mandrill_sender 0.1.0 is already in cache
[INFO] extracting crate mandrill_sender 0.1.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mandrill_sender/0.1.0
[INFO] extracting crate mandrill_sender 0.1.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mandrill_sender/0.1.0
[INFO] validating manifest of mandrill_sender-0.1.0 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mandrill_sender-0.1.0 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "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/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/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/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mandrill_sender/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mandrill_sender-0.1.0 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a8bf3609ad97bcd27058c28cc1d000a1218d2f9c4c8964331df11721e7e403ea
[INFO] running `"docker" "start" "-a" "a8bf3609ad97bcd27058c28cc1d000a1218d2f9c4c8964331df11721e7e403ea"`
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking cookie v0.2.5
[INFO] [stderr]     Checking serde_urlencoded v0.3.0
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking hyper v0.9.18
[INFO] [stderr]     Checking reqwest v0.1.0
[INFO] [stderr]     Checking 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] 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 5.69s
[INFO] running `"docker" "inspect" "a8bf3609ad97bcd27058c28cc1d000a1218d2f9c4c8964331df11721e7e403ea"`
[INFO] running `"docker" "rm" "-f" "a8bf3609ad97bcd27058c28cc1d000a1218d2f9c4c8964331df11721e7e403ea"`
[INFO] [stdout] a8bf3609ad97bcd27058c28cc1d000a1218d2f9c4c8964331df11721e7e403ea