[INFO] cloning repository mihyaeru21/brainfuck-rs
[INFO] running `"git" "clone" "--bare" "git://github.com/mihyaeru21/brainfuck-rs.git" "work/cache/sources/gh/mihyaeru21/brainfuck-rs"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/mihyaeru21/brainfuck-rs'...
[INFO] running `"git" "clone" "work/cache/sources/gh/mihyaeru21/brainfuck-rs" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/mihyaeru21/brainfuck-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/mihyaeru21/brainfuck-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mihyaeru21/brainfuck-rs" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/mihyaeru21/brainfuck-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/mihyaeru21/brainfuck-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 165b7eff7588e573be39072566c7f8f7d0d8cdb5
[INFO] sha for GitHub repo mihyaeru21/brainfuck-rs: 165b7eff7588e573be39072566c7f8f7d0d8cdb5
[INFO] validating manifest of mihyaeru21/brainfuck-rs on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mihyaeru21/brainfuck-rs on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mihyaeru21/brainfuck-rs
[INFO] finished frobbing mihyaeru21/brainfuck-rs
[INFO] frobbed toml for mihyaeru21/brainfuck-rs written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/mihyaeru21/brainfuck-rs/Cargo.toml
[INFO] started frobbing mihyaeru21/brainfuck-rs
[INFO] finished frobbing mihyaeru21/brainfuck-rs
[INFO] frobbed toml for mihyaeru21/brainfuck-rs written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/mihyaeru21/brainfuck-rs/Cargo.toml
[INFO] crate mihyaeru21/brainfuck-rs has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mihyaeru21/brainfuck-rs against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-4/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/mihyaeru21/brainfuck-rs:/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1890fae5d26878610dd185e0af98ad1e90f6dbeb547bc579021622e45e5cc619
[INFO] running `"docker" "start" "-a" "1890fae5d26878610dd185e0af98ad1e90f6dbeb547bc579021622e45e5cc619"`
[INFO] [stderr]     Checking brainfuck v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/memory.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let mut value = self.get_mut()?;
[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/memory.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut value = self.get_mut()?;
[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/memory.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut v = self.get_mut()?;
[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/memory.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let mut value = self.get_mut()?;
[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/memory.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut value = self.get_mut()?;
[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/memory.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut v = self.get_mut()?;
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `"docker" "inspect" "1890fae5d26878610dd185e0af98ad1e90f6dbeb547bc579021622e45e5cc619"`
[INFO] running `"docker" "rm" "-f" "1890fae5d26878610dd185e0af98ad1e90f6dbeb547bc579021622e45e5cc619"`
[INFO] [stdout] 1890fae5d26878610dd185e0af98ad1e90f6dbeb547bc579021622e45e5cc619