Sep 14 18:52:48.361 INFO checking calculator-0.0.1 against try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0 for pr-53578-1
Sep 14 18:52:48.361 INFO running: cargo +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets
Sep 14 18:52:48.361 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53578-1/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-2/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/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 +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 18:52:48.492 INFO blam! b42297303e3f4404bef175d241ca796c340034f2485dd87d4406ab69736cb017
Sep 14 18:52:48.494 INFO running `"docker" "start" "-a" "b42297303e3f4404bef175d241ca796c340034f2485dd87d4406ab69736cb017"`
Sep 14 18:52:49.230 INFO kablam! usermod: no changes
Sep 14 18:52:49.264 INFO kablam!     Checking vec_map v0.0.1
Sep 14 18:52:49.783 INFO kablam!     Checking calculator v0.0.1 (file:///source)
Sep 14 18:52:50.398 INFO kablam! error[E0635]: unknown feature `collections`
Sep 14 18:52:50.399 INFO kablam!  --> src/expr.rs:4:12
Sep 14 18:52:50.399 INFO kablam!   |
Sep 14 18:52:50.399 INFO kablam! 4 | #![feature(collections)]
Sep 14 18:52:50.399 INFO kablam!   |            ^^^^^^^^^^^
Sep 14 18:52:50.399 INFO kablam! 
Sep 14 18:52:50.418 INFO kablam! error: aborting due to previous error
Sep 14 18:52:50.422 INFO kablam! 
Sep 14 18:52:50.423 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 14 18:52:50.438 INFO kablam! error: Could not compile `calculator`.
Sep 14 18:52:50.439 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 14 18:52:50.674 INFO kablam! error[E0635]: unknown feature `collections`
Sep 14 18:52:50.674 INFO kablam!  --> src/expr.rs:4:12
Sep 14 18:52:50.674 INFO kablam!   |
Sep 14 18:52:50.674 INFO kablam! 4 | #![feature(collections)]
Sep 14 18:52:50.674 INFO kablam!   |            ^^^^^^^^^^^
Sep 14 18:52:50.674 INFO kablam! 
Sep 14 18:52:50.699 INFO kablam! error: aborting due to previous error
Sep 14 18:52:50.699 INFO kablam! 
Sep 14 18:52:50.699 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 14 18:52:50.700 INFO kablam! error: Could not compile `calculator`.
Sep 14 18:52:50.701 INFO kablam! 
Sep 14 18:52:50.701 INFO kablam! To learn more, run the command again with --verbose.
Sep 14 18:52:50.701 INFO kablam! su: No module specific data is present
Sep 14 18:52:51.591 INFO running `"docker" "rm" "-f" "b42297303e3f4404bef175d241ca796c340034f2485dd87d4406ab69736cb017"`
Sep 14 18:52:51.734 INFO blam! b42297303e3f4404bef175d241ca796c340034f2485dd87d4406ab69736cb017