Sep 10 09:44:46.936 INFO checking simple_json-0.2.3 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 09:44:46.936 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 09:44:46.936 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-2/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 09:44:47.129 INFO blam! 276118a6dbb533c69bbbcbecd3d9d06bcfc5c32a2e0d112232f3c3e50147b62e
Sep 10 09:44:47.132 INFO running `"docker" "start" "-a" "276118a6dbb533c69bbbcbecd3d9d06bcfc5c32a2e0d112232f3c3e50147b62e"`
Sep 10 09:44:48.169 INFO kablam! usermod: no changes
Sep 10 09:44:48.200 INFO kablam!     Checking simple_json v0.2.3 (file:///source)
Sep 10 09:44:49.102 INFO kablam! warning: unused import: `Number`
Sep 10 09:44:49.102 INFO kablam!  --> tests/to_string.rs:4:26
Sep 10 09:44:49.102 INFO kablam!   |
Sep 10 09:44:49.102 INFO kablam! 4 | use simple_json::{ Json, Number };
Sep 10 09:44:49.102 INFO kablam!   |                          ^^^^^^
Sep 10 09:44:49.102 INFO kablam!   |
Sep 10 09:44:49.102 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 10 09:44:49.102 INFO kablam! 
Sep 10 09:44:49.246 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Sep 10 09:44:49.246 INFO kablam! su: No module specific data is present
Sep 10 09:44:50.109 INFO running `"docker" "rm" "-f" "276118a6dbb533c69bbbcbecd3d9d06bcfc5c32a2e0d112232f3c3e50147b62e"`
Sep 10 09:44:50.171 INFO blam! 276118a6dbb533c69bbbcbecd3d9d06bcfc5c32a2e0d112232f3c3e50147b62e