ai-agents-missing-attribute-qwen2-5-vlvisionattention-with-flash-attention-cra-886f778c

THEN Add an `is_causal` attribute to the `Qwen2_5_VLVisionAttention` class, typically set to `False` or derived from the attention mask. This ensures compatibility with the flash attention integration that expects this attribute. The fix was implemented in PR #39121.

class Qwen2_5_VLVisionAttention(nn.Module):
    def __init__(self, config):
        super().__init__()
        # ... existing init code ...
        self.is_causal = False  # added for flash attention compatibility