Aug 31 19:03:04.641 INFO checking pdf-canvas-0.5.4 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Aug 31 19:03:04.641 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Aug 31 19:03:04.641 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53578/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-2/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 31 19:03:04.821 INFO blam! e97493cbe426080b77659e5aa6fb7b920af9052b04343516387aa8931ae8feb6
Aug 31 19:03:04.823 INFO running `"docker" "start" "-a" "e97493cbe426080b77659e5aa6fb7b920af9052b04343516387aa8931ae8feb6"`
Aug 31 19:03:05.553 INFO kablam!    Compiling pdf-canvas v0.5.4 (file:///source)
Aug 31 19:03:06.182 INFO kablam! warning: variable does not need to be mutable
Aug 31 19:03:06.182 INFO kablam!   --> src/build_metrics.rs:37:9
Aug 31 19:03:06.182 INFO kablam!    |
Aug 31 19:03:06.182 INFO kablam! 37 |     let mut f = &mut File::create(&dst).unwrap();
Aug 31 19:03:06.183 INFO kablam!    |         ----^
Aug 31 19:03:06.183 INFO kablam!    |         |
Aug 31 19:03:06.183 INFO kablam!    |         help: remove this `mut`
Aug 31 19:03:06.183 INFO kablam!    |
Aug 31 19:03:06.183 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 31 19:03:06.183 INFO kablam! 
Aug 31 19:03:11.598 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.07s
Aug 31 19:03:11.606 INFO kablam! su: No module specific data is present
Aug 31 19:03:12.022 INFO running `"docker" "rm" "-f" "e97493cbe426080b77659e5aa6fb7b920af9052b04343516387aa8931ae8feb6"`
Aug 31 19:03:12.126 INFO blam! e97493cbe426080b77659e5aa6fb7b920af9052b04343516387aa8931ae8feb6