Aug 01 17:36:21.404 INFO checking SimonSapin/rust-on-bbc-microbit against 1.27.2+tmplazy for lazy_static-1
Aug 01 17:36:21.404 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 17:36:21.404 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 17:36:21.404 INFO running `"docker" "create" "-v" "/tmp/crater.xSe0ptSrJtpe:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+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 01 17:36:21.667 INFO blam! 5f1f53afd21cb068e7ad58d79951874b90d466fd46a455096d37f6bcaa09f88b
Aug 01 17:36:21.669 INFO running `"docker" "start" "-a" "5f1f53afd21cb068e7ad58d79951874b90d466fd46a455096d37f6bcaa09f88b"`
Aug 01 17:36:22.647 INFO kablam!     Checking rust-on-bbc-microbit v0.1.0 (file:///source)
Aug 01 17:36:23.039 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 17:36:23.039 INFO kablam!  --> src/lib.rs:2:1
Aug 01 17:36:23.039 INFO kablam!   |
Aug 01 17:36:23.039 INFO kablam! 2 | #![feature(lang_items, asm)]
Aug 01 17:36:23.039 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 17:36:23.048 INFO kablam! 
Aug 01 17:36:23.049 INFO kablam! error: aborting due to previous error
Aug 01 17:36:23.050 INFO kablam! 
Aug 01 17:36:23.050 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 17:36:23.060 INFO kablam! error: Could not compile `rust-on-bbc-microbit`.
Aug 01 17:36:23.061 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 17:36:23.158 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 17:36:23.158 INFO kablam!  --> src/lib.rs:2:1
Aug 01 17:36:23.158 INFO kablam!   |
Aug 01 17:36:23.158 INFO kablam! 2 | #![feature(lang_items, asm)]
Aug 01 17:36:23.158 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 17:36:23.158 INFO kablam! 
Aug 01 17:36:23.158 INFO kablam! error: aborting due to previous error
Aug 01 17:36:23.158 INFO kablam! 
Aug 01 17:36:23.158 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 17:36:23.164 INFO kablam! error: Could not compile `rust-on-bbc-microbit`.
Aug 01 17:36:23.164 INFO kablam! 
Aug 01 17:36:23.164 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 17:36:23.166 INFO kablam! su: No module specific data is present
Aug 01 17:36:23.631 INFO running `"docker" "rm" "-f" "5f1f53afd21cb068e7ad58d79951874b90d466fd46a455096d37f6bcaa09f88b"`
Aug 01 17:36:23.786 INFO blam! 5f1f53afd21cb068e7ad58d79951874b90d466fd46a455096d37f6bcaa09f88b