Sep 18 02:56:47.953 INFO checking calculator-0.0.1 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 18 02:56:47.953 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 18 02:56:47.953 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-5/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 18 02:56:48.116 INFO blam! b64a97e08526fce9f18daf291f9eae13bd0396e4a1a419e22a1beba14a712ea6
Sep 18 02:56:48.120 INFO running `"docker" "start" "-a" "b64a97e08526fce9f18daf291f9eae13bd0396e4a1a419e22a1beba14a712ea6"`
Sep 18 02:56:48.846 INFO kablam! usermod: no changes
Sep 18 02:56:48.879 INFO kablam!     Checking vec_map v0.0.1
Sep 18 02:56:49.368 INFO kablam!     Checking calculator v0.0.1 (/source)
Sep 18 02:56:50.195 INFO kablam! error[E0635]: unknown feature `collections`
Sep 18 02:56:50.195 INFO kablam!  --> src/expr.rs:4:12
Sep 18 02:56:50.195 INFO kablam!   |
Sep 18 02:56:50.195 INFO kablam! 4 | #![feature(collections)]
Sep 18 02:56:50.195 INFO kablam!   |            ^^^^^^^^^^^
Sep 18 02:56:50.195 INFO kablam! 
Sep 18 02:56:50.207 INFO kablam! error: aborting due to previous error
Sep 18 02:56:50.207 INFO kablam! 
Sep 18 02:56:50.207 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 18 02:56:50.227 INFO kablam! error[E0635]: unknown feature `collections`
Sep 18 02:56:50.227 INFO kablam!  --> src/expr.rs:4:12
Sep 18 02:56:50.227 INFO kablam!   |
Sep 18 02:56:50.227 INFO kablam! 4 | #![feature(collections)]
Sep 18 02:56:50.227 INFO kablam!   |            ^^^^^^^^^^^
Sep 18 02:56:50.227 INFO kablam! 
Sep 18 02:56:50.227 INFO kablam! error: Could not compile `calculator`.
Sep 18 02:56:50.227 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 18 02:56:50.259 INFO kablam! error: aborting due to previous error
Sep 18 02:56:50.259 INFO kablam! 
Sep 18 02:56:50.259 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 18 02:56:50.264 INFO kablam! error: Could not compile `calculator`.
Sep 18 02:56:50.264 INFO kablam! 
Sep 18 02:56:50.264 INFO kablam! To learn more, run the command again with --verbose.
Sep 18 02:56:50.267 INFO kablam! su: No module specific data is present
Sep 18 02:56:51.152 INFO running `"docker" "rm" "-f" "b64a97e08526fce9f18daf291f9eae13bd0396e4a1a419e22a1beba14a712ea6"`
Sep 18 02:56:51.447 INFO blam! b64a97e08526fce9f18daf291f9eae13bd0396e4a1a419e22a1beba14a712ea6