Sep 02 01:33:13.897 INFO checking calculator-0.0.1 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 02 01:33:13.897 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 02 01:33:13.897 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/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 02 01:33:14.070 INFO blam! cd7faa71c527719a4722e2945b3b8335c5b52c38db0505cc1758c0bbf5bc0cac
Sep 02 01:33:14.073 INFO running `"docker" "start" "-a" "cd7faa71c527719a4722e2945b3b8335c5b52c38db0505cc1758c0bbf5bc0cac"`
Sep 02 01:33:14.751 INFO kablam!     Checking calculator v0.0.1 (file:///source)
Sep 02 01:33:15.880 INFO kablam! error[E0635]: unknown feature `collections`
Sep 02 01:33:15.880 INFO kablam!  --> src/expr.rs:4:12
Sep 02 01:33:15.880 INFO kablam!   |
Sep 02 01:33:15.880 INFO kablam! 4 | #![feature(collections)]
Sep 02 01:33:15.880 INFO kablam!   |            ^^^^^^^^^^^
Sep 02 01:33:15.881 INFO kablam! 
Sep 02 01:33:15.903 INFO kablam! error: aborting due to previous error
Sep 02 01:33:15.903 INFO kablam! 
Sep 02 01:33:15.904 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 02 01:33:15.913 INFO kablam! error: Could not compile `calculator`.
Sep 02 01:33:15.913 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 01:33:16.219 INFO kablam! error[E0635]: unknown feature `collections`
Sep 02 01:33:16.219 INFO kablam!  --> src/expr.rs:4:12
Sep 02 01:33:16.219 INFO kablam!   |
Sep 02 01:33:16.219 INFO kablam! 4 | #![feature(collections)]
Sep 02 01:33:16.219 INFO kablam!   |            ^^^^^^^^^^^
Sep 02 01:33:16.219 INFO kablam! 
Sep 02 01:33:16.243 INFO kablam! error: aborting due to previous error
Sep 02 01:33:16.243 INFO kablam! 
Sep 02 01:33:16.243 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 02 01:33:16.250 INFO kablam! error: Could not compile `calculator`.
Sep 02 01:33:16.250 INFO kablam! 
Sep 02 01:33:16.250 INFO kablam! To learn more, run the command again with --verbose.
Sep 02 01:33:16.251 INFO kablam! su: No module specific data is present
Sep 02 01:33:16.815 INFO running `"docker" "rm" "-f" "cd7faa71c527719a4722e2945b3b8335c5b52c38db0505cc1758c0bbf5bc0cac"`
Sep 02 01:33:16.921 INFO blam! cd7faa71c527719a4722e2945b3b8335c5b52c38db0505cc1758c0bbf5bc0cac