Sep 21 12:38:32.153 INFO checking calculator-0.0.1 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 12:38:32.153 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 12:38:32.153 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-1/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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 +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 12:38:32.364 INFO blam! f31eb977a1b2469c22b88dbabca2a3ef0ae6018067fc7faffb9a57e794c28fd5
Sep 21 12:38:32.365 INFO running `"docker" "start" "-a" "f31eb977a1b2469c22b88dbabca2a3ef0ae6018067fc7faffb9a57e794c28fd5"`
Sep 21 12:38:33.360 INFO kablam! usermod: no changes
Sep 21 12:38:33.384 INFO kablam!     Checking vec_map v0.0.1
Sep 21 12:38:33.778 INFO kablam!     Checking calculator v0.0.1 (/source)
Sep 21 12:38:34.190 INFO kablam! error[E0635]: unknown feature `collections`
Sep 21 12:38:34.190 INFO kablam!  --> src/expr.rs:4:12
Sep 21 12:38:34.190 INFO kablam!   |
Sep 21 12:38:34.190 INFO kablam! 4 | #![feature(collections)]
Sep 21 12:38:34.190 INFO kablam!   |            ^^^^^^^^^^^
Sep 21 12:38:34.190 INFO kablam! 
Sep 21 12:38:34.206 INFO kablam! error: aborting due to previous error
Sep 21 12:38:34.206 INFO kablam! 
Sep 21 12:38:34.206 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 21 12:38:34.207 INFO kablam! error: Could not compile `calculator`.
Sep 21 12:38:34.207 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 21 12:38:34.454 INFO kablam! error[E0635]: unknown feature `collections`
Sep 21 12:38:34.454 INFO kablam!  --> src/expr.rs:4:12
Sep 21 12:38:34.454 INFO kablam!   |
Sep 21 12:38:34.454 INFO kablam! 4 | #![feature(collections)]
Sep 21 12:38:34.454 INFO kablam!   |            ^^^^^^^^^^^
Sep 21 12:38:34.454 INFO kablam! 
Sep 21 12:38:34.494 INFO kablam! error: aborting due to previous error
Sep 21 12:38:34.494 INFO kablam! 
Sep 21 12:38:34.494 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 21 12:38:34.494 INFO kablam! error: Could not compile `calculator`.
Sep 21 12:38:34.494 INFO kablam! 
Sep 21 12:38:34.494 INFO kablam! To learn more, run the command again with --verbose.
Sep 21 12:38:34.502 INFO kablam! su: No module specific data is present
Sep 21 12:38:35.609 INFO running `"docker" "rm" "-f" "f31eb977a1b2469c22b88dbabca2a3ef0ae6018067fc7faffb9a57e794c28fd5"`
Sep 21 12:38:35.757 INFO blam! f31eb977a1b2469c22b88dbabca2a3ef0ae6018067fc7faffb9a57e794c28fd5