From 04d8f2dfea201cf47766e35bfdc5ba84070d02a0 Mon Sep 17 00:00:00 2001
From: psychedelicious <4822129+psychedelicious@users.noreply.github.com>
Date: Mon, 13 Nov 2023 15:06:04 +1100
Subject: [PATCH] fix(backend): fix controlnet zip len

Do not use `strict=True` when scaling controlnet conditioning.

When using `guess_mode` (e.g. `more_control` or `more_prompt`), `down_block_res_samples` and `scales` are zipped.

These two objects are of different lengths, so using zip's strict mode raises an error.

In testing, `len(scales) === len(down_block_res_samples) + 1`.

It appears this behaviour is intentional, as the final "extra" item in `scales` is used immediately afterwards.
---
 invokeai/backend/util/hotfixes.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/invokeai/backend/util/hotfixes.py b/invokeai/backend/util/hotfixes.py
index 835575c7a1..b0e31796d5 100644
--- a/invokeai/backend/util/hotfixes.py
+++ b/invokeai/backend/util/hotfixes.py
@@ -748,7 +748,7 @@ class ControlNetModel(ModelMixin, ConfigMixin, FromOriginalControlnetMixin):
 
             scales = scales * conditioning_scale
             down_block_res_samples = [
-                sample * scale for sample, scale in zip(down_block_res_samples, scales, strict=True)
+                sample * scale for sample, scale in zip(down_block_res_samples, scales, strict=False)
             ]
             mid_block_res_sample = mid_block_res_sample * scales[-1]  # last one
         else: