Sep 06 09:11:37.230 INFO checking calculator-0.0.1 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 09:11:37.230 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 09:11:37.231 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-3/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 09:11:37.365 INFO blam! 3aee27a5788389fe795979021a14bb739df27f703b5bc1b0144e43f8412c0846
Sep 06 09:11:37.367 INFO running `"docker" "start" "-a" "3aee27a5788389fe795979021a14bb739df27f703b5bc1b0144e43f8412c0846"`
Sep 06 09:11:38.555 INFO kablam! usermod: no changes
Sep 06 09:11:38.575 INFO kablam!     Checking vec_map v0.0.1
Sep 06 09:11:38.897 INFO kablam!     Checking calculator v0.0.1 (file:///source)
Sep 06 09:11:39.306 INFO kablam! error[E0635]: unknown feature `collections`
Sep 06 09:11:39.306 INFO kablam!  --> src/expr.rs:4:12
Sep 06 09:11:39.306 INFO kablam!   |
Sep 06 09:11:39.306 INFO kablam! 4 | #![feature(collections)]
Sep 06 09:11:39.306 INFO kablam!   |            ^^^^^^^^^^^
Sep 06 09:11:39.306 INFO kablam! 
Sep 06 09:11:39.314 INFO kablam! error: aborting due to previous error
Sep 06 09:11:39.314 INFO kablam! 
Sep 06 09:11:39.314 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 06 09:11:39.321 INFO kablam! error: Could not compile `calculator`.
Sep 06 09:11:39.321 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 06 09:11:39.446 INFO kablam! error[E0635]: unknown feature `collections`
Sep 06 09:11:39.446 INFO kablam!  --> src/expr.rs:4:12
Sep 06 09:11:39.446 INFO kablam!   |
Sep 06 09:11:39.446 INFO kablam! 4 | #![feature(collections)]
Sep 06 09:11:39.446 INFO kablam!   |            ^^^^^^^^^^^
Sep 06 09:11:39.446 INFO kablam! 
Sep 06 09:11:39.472 INFO kablam! error: aborting due to previous error
Sep 06 09:11:39.472 INFO kablam! 
Sep 06 09:11:39.472 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 06 09:11:39.481 INFO kablam! error: Could not compile `calculator`.
Sep 06 09:11:39.481 INFO kablam! 
Sep 06 09:11:39.481 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 09:11:39.481 INFO kablam! su: No module specific data is present
Sep 06 09:11:40.311 INFO running `"docker" "rm" "-f" "3aee27a5788389fe795979021a14bb739df27f703b5bc1b0144e43f8412c0846"`
Sep 06 09:11:40.404 INFO blam! 3aee27a5788389fe795979021a14bb739df27f703b5bc1b0144e43f8412c0846