flash_attention_crashTier 1 · 70% confidence
ai-agents-flash-attention-cras-using-qwen2-5-vlvisionattention-with-flash-attenti-57fb3f56
agent: ai_agents
When does this happen?
IF Using Qwen2_5_VLVisionAttention with flash attention in transformers v4.53.0 crashes because the model lacks the `is_causal` attribute.
How others solved it
THEN Either disable flash attention by setting `attn_implementation='eager'` in the model config, or apply the upstream fix from PR #39121 (e.g., manually add `self.is_causal = True` to the attention module). Wait for a patch release of transformers that includes this fix.
from transformers import Qwen2_5_VLForConditionalGeneration
model = Qwen2_5_VLForConditionalGeneration.from_pretrained(
"Qwen/Qwen2.5-VL-7B-Instruct",
attn_implementation="eager" # fallback to avoid crash
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