Aug 31 19:03:12.171 INFO checking pdf-0.5.2 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Aug 31 19:03:12.172 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Aug 31 19:03:12.172 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 19:03:12.406 INFO blam! 0c837fec4ad136c477da18ccc1d34965720a7f71b68b86a6f3c2495c50297847
Aug 31 19:03:12.408 INFO running `"docker" "start" "-a" "0c837fec4ad136c477da18ccc1d34965720a7f71b68b86a6f3c2495c50297847"`
Aug 31 19:03:13.116 INFO kablam!    Compiling pdf v0.5.2 (file:///source)
Aug 31 19:03:13.999 INFO kablam! warning: variable does not need to be mutable
Aug 31 19:03:13.999 INFO kablam!   --> src/build_metrics.rs:37:9
Aug 31 19:03:13.999 INFO kablam!    |
Aug 31 19:03:14.000 INFO kablam! 37 |     let mut f = &mut File::create(&dst).unwrap();
Aug 31 19:03:14.000 INFO kablam!    |         ----^
Aug 31 19:03:14.000 INFO kablam!    |         |
Aug 31 19:03:14.000 INFO kablam!    |         help: remove this `mut`
Aug 31 19:03:14.000 INFO kablam!    |
Aug 31 19:03:14.000 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 31 19:03:14.000 INFO kablam! 
Aug 31 19:03:18.989 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.91s
Aug 31 19:03:18.993 INFO kablam! su: No module specific data is present
Aug 31 19:03:19.501 INFO running `"docker" "rm" "-f" "0c837fec4ad136c477da18ccc1d34965720a7f71b68b86a6f3c2495c50297847"`
Aug 31 19:03:19.609 INFO blam! 0c837fec4ad136c477da18ccc1d34965720a7f71b68b86a6f3c2495c50297847