but I'm experiencing a different one now, I have no clue:
```
 2:16.20 /building/build/workspace/sources/xulrunner-qt/embedding/embedlite/embedthread/EmbedContentController.cpp:58:7: error: fallthrough annotation does not directly precede switch label
 2:16.20       MOZ_FALLTHROUGH;
 2:16.20       ^
 2:16.20 /building/build/workspace/sources/xulrunner-qt/firefox-build-dir/dist/include/mozilla/Attributes.h:440:25: note: expanded from macro 'MOZ_FALLTHROUGH'
 2:16.20 #define MOZ_FALLTHROUGH [[clang::fallthrough]]
 2:16.20                         ^
```