Sep 01 11:41:20.639 INFO checking pdf-0.5.2 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 11:41:20.639 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 11:41:20.639 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-0/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 11:41:20.842 INFO blam! 780687a81056101aba56f621c39b3fbe947b008cc99d40e9b5deb2eda04e144f
Sep 01 11:41:20.844 INFO running `"docker" "start" "-a" "780687a81056101aba56f621c39b3fbe947b008cc99d40e9b5deb2eda04e144f"`
Sep 01 11:41:21.590 INFO kablam!    Compiling pdf v0.5.2 (file:///source)
Sep 01 11:41:22.162 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:41:22.162 INFO kablam!   --> src/build_metrics.rs:37:9
Sep 01 11:41:22.163 INFO kablam!    |
Sep 01 11:41:22.163 INFO kablam! 37 |     let mut f = &mut File::create(&dst).unwrap();
Sep 01 11:41:22.163 INFO kablam!    |         ----^
Sep 01 11:41:22.163 INFO kablam!    |         |
Sep 01 11:41:22.163 INFO kablam!    |         help: remove this `mut`
Sep 01 11:41:22.163 INFO kablam!    |
Sep 01 11:41:22.163 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 11:41:22.163 INFO kablam! 
Sep 01 11:41:27.337 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.78s
Sep 01 11:41:27.341 INFO kablam! su: No module specific data is present
Sep 01 11:41:27.830 INFO running `"docker" "rm" "-f" "780687a81056101aba56f621c39b3fbe947b008cc99d40e9b5deb2eda04e144f"`
Sep 01 11:41:27.930 INFO blam! 780687a81056101aba56f621c39b3fbe947b008cc99d40e9b5deb2eda04e144f