Max Sagebaum <max.sagebaum@xxxxxxxxxxxxxxxxx> writes: > > A reproducer on compiler explorer: https://godbolt.org/z/YEPzfx3eT > > Am I doing something wrong? Is this a possible bug? I don't see anything obviously wrong, but you don't include the definition of match_return. Yes I would file a bug on it in bugzilla. Use test cases that are fully self contained. -Andi