Aug 11 18:31:58.817 INFO checking calculator-0.0.1 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 18:31:58.817 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 18:31:58.817 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 18:31:58.817 INFO running `"docker" "create" "-v" "/tmp/crater.K1MdeFJv8YNz:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-7/master#f6d43ed84207c7e58f363f46e5a438ff40f2b311:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 18:31:59.038 INFO blam! 56ee4e9ec3659744ab47ebfa9efeda9bb89df2ece4d94e6f5de9cf8f77f7a6eb
Aug 11 18:31:59.042 INFO running `"docker" "start" "-a" "56ee4e9ec3659744ab47ebfa9efeda9bb89df2ece4d94e6f5de9cf8f77f7a6eb"`
Aug 11 18:32:01.503 INFO kablam!     Checking vec_map v0.0.1
Aug 11 18:32:02.440 INFO kablam!     Checking calculator v0.0.1 (file:///source)
Aug 11 18:32:03.417 INFO kablam! error[E0635]: unknown feature `collections`
Aug 11 18:32:03.417 INFO kablam!  --> src/expr.rs:4:12
Aug 11 18:32:03.417 INFO kablam!   |
Aug 11 18:32:03.417 INFO kablam! 4 | #![feature(collections)]
Aug 11 18:32:03.417 INFO kablam!   |            ^^^^^^^^^^^
Aug 11 18:32:03.417 INFO kablam! 
Aug 11 18:32:03.437 INFO kablam! error: aborting due to previous error
Aug 11 18:32:03.437 INFO kablam! 
Aug 11 18:32:03.438 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 18:32:03.446 INFO kablam! error: Could not compile `calculator`.
Aug 11 18:32:03.446 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 18:32:03.856 INFO kablam! error[E0635]: unknown feature `collections`
Aug 11 18:32:03.856 INFO kablam!  --> src/expr.rs:4:12
Aug 11 18:32:03.856 INFO kablam!   |
Aug 11 18:32:03.856 INFO kablam! 4 | #![feature(collections)]
Aug 11 18:32:03.856 INFO kablam!   |            ^^^^^^^^^^^
Aug 11 18:32:03.856 INFO kablam! 
Aug 11 18:32:03.907 INFO kablam! error: aborting due to previous error
Aug 11 18:32:03.907 INFO kablam! 
Aug 11 18:32:03.907 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 18:32:03.907 INFO kablam! error: Could not compile `calculator`.
Aug 11 18:32:03.907 INFO kablam! 
Aug 11 18:32:03.907 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 18:32:03.910 INFO kablam! su: No module specific data is present
Aug 11 18:32:04.934 INFO running `"docker" "rm" "-f" "56ee4e9ec3659744ab47ebfa9efeda9bb89df2ece4d94e6f5de9cf8f77f7a6eb"`
Aug 11 18:32:05.089 INFO blam! 56ee4e9ec3659744ab47ebfa9efeda9bb89df2ece4d94e6f5de9cf8f77f7a6eb