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| -rw-r--r-- | book/en/src/by-example/app.md | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/book/en/src/by-example/app.md b/book/en/src/by-example/app.md index e0f4f941..9a073ac4 100644 --- a/book/en/src/by-example/app.md +++ b/book/en/src/by-example/app.md @@ -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}} ``` |