fix: QwenImage pipelines silently disable CFG with pre-computed negative_prompt_embeds#13449
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…beds mask is None `encode_prompt()` optimizes all-ones masks to `None`, but `has_neg_prompt` required both `negative_prompt_embeds` and `negative_prompt_embeds_mask` to be non-None. This caused CFG to be silently skipped when users passed pre-computed `negative_prompt_embeds` with an optimized `None` mask. Remove the `negative_prompt_embeds_mask is not None` check from all 9 QwenImage pipeline variants so that a `None` mask correctly means "all tokens valid" rather than "no negative prompt". Fixes huggingface#13377 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
negative_prompt_embedswithNonemaskencode_prompt()converts all-ones masks toNoneas an optimization (line 266-267), buthas_neg_promptrequired mask to be non-None — creating an inconsistencyand negative_prompt_embeds_mask is not Nonecheck soNonemask means "all tokens valid"Affected pipelines
pipeline_qwenimage.pypipeline_qwenimage_img2img.pypipeline_qwenimage_inpaint.pypipeline_qwenimage_layered.pypipeline_qwenimage_controlnet.pypipeline_qwenimage_controlnet_inpaint.pypipeline_qwenimage_edit.pypipeline_qwenimage_edit_inpaint.pypipeline_qwenimage_edit_plus.pyTest plan
encode_prompt()converts all-ones mask toNone(line 266-267)Fixes #13377
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