Improved loop example docs to highlight that one cannot have empty loops in idle
@@ -77,6 +77,9 @@ references that are safe to access.
The example below shows that `idle` runs after `init`.
+**Note:** The `loop {}` in idle cannot be empty as this will crash the microcontroller due to a bug
+in LLVM which miss-optimizes empty loops to a `UDF` instruction in release mode.
+
``` rust
{{#include ../../../../examples/idle.rs}}
```
