Dec 19 12:15:56.337 INFO checking mtn/silver against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:15:56.337 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mtn/silver:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:15:56.705 INFO [stdout] 43acfe6254c8d1c022f21f828c892a1130723af4ee7922fe694b136d1279393e
Dec 19 12:15:56.707 INFO running `"docker" "start" "-a" "43acfe6254c8d1c022f21f828c892a1130723af4ee7922fe694b136d1279393e"`
Dec 19 12:15:57.349 INFO [stderr]     Checking silver v0.1.0 (/opt/crater/workdir)
Dec 19 12:15:57.822 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.822 INFO [stderr]    --> src/parser.rs:331:13
Dec 19 12:15:57.822 INFO [stderr]     |
Dec 19 12:15:57.822 INFO [stderr] 331 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.822 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.822 INFO [stderr]     |             |
Dec 19 12:15:57.822 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.822 INFO [stderr]     |
Dec 19 12:15:57.822 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 12:15:57.822 INFO [stderr] 
Dec 19 12:15:57.823 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.823 INFO [stderr]    --> src/parser.rs:344:13
Dec 19 12:15:57.823 INFO [stderr]     |
Dec 19 12:15:57.823 INFO [stderr] 344 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.823 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.823 INFO [stderr]     |             |
Dec 19 12:15:57.823 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.823 INFO [stderr] 
Dec 19 12:15:57.825 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.825 INFO [stderr]    --> src/parser.rs:366:13
Dec 19 12:15:57.825 INFO [stderr]     |
Dec 19 12:15:57.825 INFO [stderr] 366 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.825 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.825 INFO [stderr]     |             |
Dec 19 12:15:57.825 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.825 INFO [stderr] 
Dec 19 12:15:57.826 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.826 INFO [stderr]    --> src/parser.rs:385:13
Dec 19 12:15:57.826 INFO [stderr]     |
Dec 19 12:15:57.826 INFO [stderr] 385 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.826 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.826 INFO [stderr]     |             |
Dec 19 12:15:57.826 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.826 INFO [stderr] 
Dec 19 12:15:57.827 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.827 INFO [stderr]    --> src/parser.rs:406:13
Dec 19 12:15:57.827 INFO [stderr]     |
Dec 19 12:15:57.827 INFO [stderr] 406 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.827 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.827 INFO [stderr]     |             |
Dec 19 12:15:57.827 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.827 INFO [stderr] 
Dec 19 12:15:57.828 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.828 INFO [stderr]    --> src/parser.rs:430:13
Dec 19 12:15:57.828 INFO [stderr]     |
Dec 19 12:15:57.828 INFO [stderr] 430 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.828 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.828 INFO [stderr]     |             |
Dec 19 12:15:57.828 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.828 INFO [stderr] 
Dec 19 12:15:57.830 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.830 INFO [stderr]    --> src/parser.rs:451:13
Dec 19 12:15:57.830 INFO [stderr]     |
Dec 19 12:15:57.830 INFO [stderr] 451 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.830 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.830 INFO [stderr]     |             |
Dec 19 12:15:57.830 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.830 INFO [stderr] 
Dec 19 12:15:57.832 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:15:57.832 INFO [stderr]    --> src/parser.rs:487:13
Dec 19 12:15:57.832 INFO [stderr]     |
Dec 19 12:15:57.832 INFO [stderr] 487 |         let mut lexer = lexer::Lexer::new(inp);
Dec 19 12:15:57.832 INFO [stderr]     |             ----^^^^^
Dec 19 12:15:57.832 INFO [stderr]     |             |
Dec 19 12:15:57.832 INFO [stderr]     |             help: remove this `mut`
Dec 19 12:15:57.832 INFO [stderr] 
Dec 19 12:15:57.858 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
Dec 19 12:15:58.116 INFO running `"docker" "inspect" "43acfe6254c8d1c022f21f828c892a1130723af4ee7922fe694b136d1279393e"`
Dec 19 12:15:58.179 INFO running `"docker" "rm" "-f" "43acfe6254c8d1c022f21f828c892a1130723af4ee7922fe694b136d1279393e"`
Dec 19 12:15:58.272 INFO [stdout] 43acfe6254c8d1c022f21f828c892a1130723af4ee7922fe694b136d1279393e