Aug 02 14:32:53.740 INFO checking atsam4lc8c-0.1.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 14:32:53.740 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:53.740 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:53.741 INFO running `"docker" "create" "-v" "/tmp/crater.0zI9clFPzBPx:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2+tmplazy:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 14:32:53.970 INFO blam! cd97410aec0d88e89b7764eb918d97f7d21cea9fecaf34a8e0f04b97ca3f6f47
Aug 02 14:32:53.972 INFO running `"docker" "start" "-a" "cd97410aec0d88e89b7764eb918d97f7d21cea9fecaf34a8e0f04b97ca3f6f47"`
Aug 02 14:32:55.475 INFO kablam!    Compiling atsam4lc8c v0.1.1 (file:///source)
Aug 02 14:32:55.476 INFO kablam!    Compiling cortex-m-semihosting v0.3.0
Aug 02 14:32:55.477 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 02 14:32:57.263 INFO kablam!     Checking panic-semihosting v0.2.0
Aug 02 14:32:57.264 INFO kablam!     Checking cortex-m-log v0.2.0
Aug 02 14:32:57.606 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:32:57.606 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/panic-semihosting-0.2.0/src/lib.rs:56:1
Aug 02 14:32:57.606 INFO kablam!    |
Aug 02 14:32:57.606 INFO kablam! 56 | #![feature(lang_items)]
Aug 02 14:32:57.607 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 14:32:57.607 INFO kablam! 
Aug 02 14:32:57.628 INFO kablam! error: aborting due to previous error
Aug 02 14:32:57.629 INFO kablam! 
Aug 02 14:32:57.629 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:32:57.643 INFO kablam! error: Could not compile `panic-semihosting`.
Aug 02 14:32:57.644 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 14:34:16.586 INFO kablam! error: build failed
Aug 02 14:34:16.588 INFO kablam! su: No module specific data is present
Aug 02 14:34:19.441 INFO running `"docker" "rm" "-f" "cd97410aec0d88e89b7764eb918d97f7d21cea9fecaf34a8e0f04b97ca3f6f47"`
Aug 02 14:34:19.565 INFO blam! cd97410aec0d88e89b7764eb918d97f7d21cea9fecaf34a8e0f04b97ca3f6f47