Sep 20 06:17:26.624 INFO checking backoff-0.1.2 against master#1e21c9a297a9fe668d62887a3a6a4add8e717b17 for pr-54352
Sep 20 06:17:26.624 INFO running: cargo +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets
Sep 20 06:17:26.624 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54352/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-2/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/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=1000" "-e" "CMD=cargo +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 06:17:26.862 INFO blam! 9b72672fed0b89199595c7793555010eeee853ac9520bca2c8847ba1e2b8ba4a
Sep 20 06:17:26.864 INFO running `"docker" "start" "-a" "9b72672fed0b89199595c7793555010eeee853ac9520bca2c8847ba1e2b8ba4a"`
Sep 20 06:17:28.062 INFO kablam! usermod: no changes
Sep 20 06:17:28.214 INFO kablam!     Checking backoff v0.1.2 (/source)
Sep 20 06:17:29.238 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 20 06:17:29.238 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 20 06:17:29.238 INFO kablam!    |
Sep 20 06:17:29.238 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 20 06:17:29.238 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 20 06:17:29.238 INFO kablam!    |
Sep 20 06:17:29.238 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 20 06:17:29.238 INFO kablam! 
Sep 20 06:17:33.134 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.03s
Sep 20 06:17:33.151 INFO kablam! su: No module specific data is present
Sep 20 06:17:33.971 INFO running `"docker" "rm" "-f" "9b72672fed0b89199595c7793555010eeee853ac9520bca2c8847ba1e2b8ba4a"`
Sep 20 06:17:34.088 INFO blam! 9b72672fed0b89199595c7793555010eeee853ac9520bca2c8847ba1e2b8ba4a