Nov 30 20:25:07.083 INFO checking keymatrix-0.1.2 against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 20:25:07.084 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-2/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +32252761328f59ccfadb1bafb8148c685bc830b3-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 30 20:25:07.412 INFO [stdout] 51965f2256ec2bf11bda9352e077dbc504c0095938c0c60f27e0524f80b1a231
Nov 30 20:25:07.418 INFO running `"docker" "start" "-a" "51965f2256ec2bf11bda9352e077dbc504c0095938c0c60f27e0524f80b1a231"`
Nov 30 20:25:08.049 INFO [stderr] usermod: no changes
Nov 30 20:25:08.216 INFO [stderr]    Compiling atsamd21g18a v0.3.1
Nov 30 20:25:08.216 INFO [stderr]    Compiling cortex-m v0.3.1
Nov 30 20:25:08.216 INFO [stderr]     Checking bitfield v0.13.1
Nov 30 20:25:08.216 INFO [stderr]    Compiling cortex-m-rtfm v0.3.4
Nov 30 20:25:08.216 INFO [stderr]     Checking rtfm-core v0.2.0
Nov 30 20:25:08.236 INFO [stderr]     Checking panic-abort v0.2.0
Nov 30 20:25:08.240 INFO [stderr]    Compiling mashup-impl v0.1.9
Nov 30 20:25:08.240 INFO [stderr]    Compiling syn v0.14.9
Nov 30 20:25:08.412 INFO [stderr] error[E0557]: feature has been removed
Nov 30 20:25:08.412 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/panic-abort-0.2.0/src/lib.rs:22:12
Nov 30 20:25:08.412 INFO [stderr]    |
Nov 30 20:25:08.412 INFO [stderr] 22 | #![feature(panic_implementation)]
Nov 30 20:25:08.412 INFO [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
Nov 30 20:25:08.412 INFO [stderr]    |
Nov 30 20:25:08.412 INFO [stderr] note: subsumed by `#[panic_handler]`
Nov 30 20:25:08.412 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/panic-abort-0.2.0/src/lib.rs:22:12
Nov 30 20:25:08.412 INFO [stderr]    |
Nov 30 20:25:08.412 INFO [stderr] 22 | #![feature(panic_implementation)]
Nov 30 20:25:08.412 INFO [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
Nov 30 20:25:08.412 INFO [stderr] 
Nov 30 20:25:08.438 INFO [stderr] error[E0658]: The attribute `panic_implementation` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Nov 30 20:25:08.438 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/panic-abort-0.2.0/src/lib.rs:28:3
Nov 30 20:25:08.438 INFO [stderr]    |
Nov 30 20:25:08.438 INFO [stderr] 28 | #[panic_implementation]
Nov 30 20:25:08.438 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^
Nov 30 20:25:08.438 INFO [stderr]    |
Nov 30 20:25:08.438 INFO [stderr]    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Nov 30 20:25:08.438 INFO [stderr] 
Nov 30 20:25:08.448 INFO [stderr] error: aborting due to 2 previous errors
Nov 30 20:25:08.448 INFO [stderr] 
Nov 30 20:25:08.448 INFO [stderr] Some errors occurred: E0557, E0658.
Nov 30 20:25:08.448 INFO [stderr] For more information about an error, try `rustc --explain E0557`.
Nov 30 20:25:08.456 INFO [stderr] error: Could not compile `panic-abort`.
Nov 30 20:25:08.456 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 30 20:25:29.348 INFO [stderr] error: build failed
Nov 30 20:25:29.356 INFO [stderr] su: No module specific data is present
Nov 30 20:25:30.036 INFO running `"docker" "inspect" "51965f2256ec2bf11bda9352e077dbc504c0095938c0c60f27e0524f80b1a231"`
Nov 30 20:25:30.304 INFO running `"docker" "rm" "-f" "51965f2256ec2bf11bda9352e077dbc504c0095938c0c60f27e0524f80b1a231"`
Nov 30 20:25:30.592 INFO [stdout] 51965f2256ec2bf11bda9352e077dbc504c0095938c0c60f27e0524f80b1a231