[INFO] updating cached repository kprevas/midi2spc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kprevas/midi2spc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kprevas/midi2spc" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/kprevas/midi2spc"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/kprevas/midi2spc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kprevas/midi2spc" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/kprevas/midi2spc"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/kprevas/midi2spc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0a8c67c64686b185973edf4784b11909ec187733
[INFO] sha for GitHub repo kprevas/midi2spc: 0a8c67c64686b185973edf4784b11909ec187733
[INFO] validating manifest of kprevas/midi2spc on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kprevas/midi2spc on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kprevas/midi2spc
[INFO] finished frobbing kprevas/midi2spc
[INFO] frobbed toml for kprevas/midi2spc written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/kprevas/midi2spc/Cargo.toml
[INFO] started frobbing kprevas/midi2spc
[INFO] finished frobbing kprevas/midi2spc
[INFO] frobbed toml for kprevas/midi2spc written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/kprevas/midi2spc/Cargo.toml
[INFO] crate kprevas/midi2spc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking kprevas/midi2spc against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-4/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/kprevas/midi2spc:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cdbdc89186fc2bf76ed4544e4904180bf8bccc2f115d7bc4ee33826957ce59c3
[INFO] running `"docker" "start" "-a" "cdbdc89186fc2bf76ed4544e4904180bf8bccc2f115d7bc4ee33826957ce59c3"`
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking ghakuf v0.5.1
[INFO] [stderr]     Checking pbr v1.0.1
[INFO] [stderr]     Checking midi2spc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/midi/mod.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |         for (i, mut channel) in &mut self.channels.iter_mut().enumerate() {
[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/midi/mod.rs:154:17
[INFO] [stderr]     |
[INFO] [stderr] 154 |             let mut intervals = &mut channel.intervals;
[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/midi/mod.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |         for (i, mut channel) in &mut self.channels.iter_mut().enumerate() {
[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/midi/mod.rs:154:17
[INFO] [stderr]     |
[INFO] [stderr] 154 |             let mut intervals = &mut channel.intervals;
[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/nspc/track.rs:127:41
[INFO] [stderr]     |
[INFO] [stderr] 127 |                                     let mut instr;
[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/nspc/track.rs:127:41
[INFO] [stderr]     |
[INFO] [stderr] 127 |                                     let mut instr;
[INFO] [stderr]     |                                         ----^^^^^
[INFO] [stderr]     |                                         |
[INFO] [stderr]     |                                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.57s
[INFO] running `"docker" "inspect" "cdbdc89186fc2bf76ed4544e4904180bf8bccc2f115d7bc4ee33826957ce59c3"`
[INFO] running `"docker" "rm" "-f" "cdbdc89186fc2bf76ed4544e4904180bf8bccc2f115d7bc4ee33826957ce59c3"`
[INFO] [stdout] cdbdc89186fc2bf76ed4544e4904180bf8bccc2f115d7bc4ee33826957ce59c3