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Add bounds check for AuraFlow positional embedding indices #13110

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Add bounds check for AuraFlow positional embedding indices #13110

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6 changes: 6 additions & 0 deletions src/diffusers/models/transformers/auraflow_transformer_2d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,12 @@ def pe_selection_index_based_on_dim(self, h, w):
h_p, w_p = h // self.patch_size, w // self.patch_size
h_max, w_max = int(self.pos_embed_max_size**0.5), int(self.pos_embed_max_size**0.5)

if h_p > h_max or w_p > w_max:
raise ValueError(
f"Input latent size ({h_p}x{w_p} patches) exceeds the positional embedding grid "
f"({h_max}x{w_max}). Use a smaller resolution or increase pos_embed_max_size."
)

# Calculate the top-left corner indices for the centered patch grid
starth = h_max // 2 - h_p // 2
startw = w_max // 2 - w_p // 2
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