Sep 20 05:47:44.514 INFO checking calculator-0.0.1 against try#135b4cd023a753409d01e43b0f23d22a899feeeb for pr-54352
Sep 20 05:47:44.514 INFO running: cargo +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets
Sep 20 05:47:44.514 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54352/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-3/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/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 +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 05:47:44.659 INFO blam! 8440b719e44c993ea48fb06746a2d1629cf42afc295729b9e23aaf54c810b9cf
Sep 20 05:47:44.660 INFO running `"docker" "start" "-a" "8440b719e44c993ea48fb06746a2d1629cf42afc295729b9e23aaf54c810b9cf"`
Sep 20 05:47:45.500 INFO kablam! usermod: no changes
Sep 20 05:47:45.526 INFO kablam!     Checking vec_map v0.0.1
Sep 20 05:47:45.871 INFO kablam!     Checking calculator v0.0.1 (/source)
Sep 20 05:47:46.228 INFO kablam! error[E0635]: unknown feature `collections`
Sep 20 05:47:46.228 INFO kablam!  --> src/expr.rs:4:12
Sep 20 05:47:46.228 INFO kablam!   |
Sep 20 05:47:46.228 INFO kablam! 4 | #![feature(collections)]
Sep 20 05:47:46.228 INFO kablam!   |            ^^^^^^^^^^^
Sep 20 05:47:46.228 INFO kablam! 
Sep 20 05:47:46.242 INFO kablam! error: aborting due to previous error
Sep 20 05:47:46.242 INFO kablam! 
Sep 20 05:47:46.242 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 20 05:47:46.248 INFO kablam! error: Could not compile `calculator`.
Sep 20 05:47:46.248 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 20 05:47:46.477 INFO kablam! error[E0635]: unknown feature `collections`
Sep 20 05:47:46.477 INFO kablam!  --> src/expr.rs:4:12
Sep 20 05:47:46.477 INFO kablam!   |
Sep 20 05:47:46.477 INFO kablam! 4 | #![feature(collections)]
Sep 20 05:47:46.477 INFO kablam!   |            ^^^^^^^^^^^
Sep 20 05:47:46.477 INFO kablam! 
Sep 20 05:47:46.512 INFO kablam! error: aborting due to previous error
Sep 20 05:47:46.512 INFO kablam! 
Sep 20 05:47:46.512 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 20 05:47:46.524 INFO kablam! error: Could not compile `calculator`.
Sep 20 05:47:46.524 INFO kablam! 
Sep 20 05:47:46.524 INFO kablam! To learn more, run the command again with --verbose.
Sep 20 05:47:46.525 INFO kablam! su: No module specific data is present
Sep 20 05:47:47.349 INFO running `"docker" "rm" "-f" "8440b719e44c993ea48fb06746a2d1629cf42afc295729b9e23aaf54c810b9cf"`
Sep 20 05:47:47.459 INFO blam! 8440b719e44c993ea48fb06746a2d1629cf42afc295729b9e23aaf54c810b9cf