Sep 10 21:45:57.441 INFO checking calculator-0.0.1 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 21:45:57.441 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 21:45:57.441 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-1/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 21:45:57.625 INFO blam! f0a4991e3b443c4aa6e583e324d25bf5f9bb9b173278d66dd5feb7930b4baaec
Sep 10 21:45:57.627 INFO running `"docker" "start" "-a" "f0a4991e3b443c4aa6e583e324d25bf5f9bb9b173278d66dd5feb7930b4baaec"`
Sep 10 21:45:58.715 INFO kablam! usermod: no changes
Sep 10 21:45:58.782 INFO kablam!     Checking vec_map v0.0.1
Sep 10 21:45:59.407 INFO kablam!     Checking calculator v0.0.1 (file:///source)
Sep 10 21:45:59.970 INFO kablam! error[E0635]: unknown feature `collections`
Sep 10 21:45:59.970 INFO kablam!  --> src/expr.rs:4:12
Sep 10 21:45:59.970 INFO kablam!   |
Sep 10 21:45:59.970 INFO kablam! 4 | #![feature(collections)]
Sep 10 21:45:59.970 INFO kablam!   |            ^^^^^^^^^^^
Sep 10 21:45:59.970 INFO kablam! 
Sep 10 21:45:59.982 INFO kablam! error: aborting due to previous error
Sep 10 21:45:59.982 INFO kablam! 
Sep 10 21:45:59.982 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 10 21:45:59.987 INFO kablam! error: Could not compile `calculator`.
Sep 10 21:45:59.987 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 10 21:46:00.252 INFO kablam! error[E0635]: unknown feature `collections`
Sep 10 21:46:00.252 INFO kablam!  --> src/expr.rs:4:12
Sep 10 21:46:00.252 INFO kablam!   |
Sep 10 21:46:00.252 INFO kablam! 4 | #![feature(collections)]
Sep 10 21:46:00.252 INFO kablam!   |            ^^^^^^^^^^^
Sep 10 21:46:00.252 INFO kablam! 
Sep 10 21:46:00.282 INFO kablam! error: aborting due to previous error
Sep 10 21:46:00.282 INFO kablam! 
Sep 10 21:46:00.282 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 10 21:46:00.287 INFO kablam! error: Could not compile `calculator`.
Sep 10 21:46:00.287 INFO kablam! 
Sep 10 21:46:00.287 INFO kablam! To learn more, run the command again with --verbose.
Sep 10 21:46:00.288 INFO kablam! su: No module specific data is present
Sep 10 21:46:01.108 INFO running `"docker" "rm" "-f" "f0a4991e3b443c4aa6e583e324d25bf5f9bb9b173278d66dd5feb7930b4baaec"`
Sep 10 21:46:01.205 INFO blam! f0a4991e3b443c4aa6e583e324d25bf5f9bb9b173278d66dd5feb7930b4baaec