From 0671695e8e12e3475712ae68198e8abb347dbfd6 Mon Sep 17 00:00:00 2001
From: bigcat88 <bigcat88@icloud.com>
Date: Mon, 31 Oct 2022 16:16:16 +0300
Subject: [PATCH] Fixes #6706

---
 Tests/test_image_convert.py | 14 ++++++++++++++
 src/libImaging/Convert.c    |  1 +
 2 files changed, 15 insertions(+)

diff --git a/Tests/test_image_convert.py b/Tests/test_image_convert.py
index 902d8bf8f..3ede1b5e1 100644
--- a/Tests/test_image_convert.py
+++ b/Tests/test_image_convert.py
@@ -338,3 +338,17 @@ def test_matrix_identity():
     # Assert
     # No change
     assert_image_equal(converted_im, im)
+
+
+def test_rgba_premultiplied_to_rgb():
+    im = Image.merge(
+        "RGBa",
+        [
+            Image.new(mode="L", size=(1, 1), color=128),
+            Image.new(mode="L", size=(1, 1), color=255),
+            Image.new(mode="L", size=(1, 1), color=64),
+            Image.new(mode="L", size=(1, 1), color=64),
+        ],
+    )
+    im = im.convert(mode="RGB")
+    assert im.getpixel((0, 0)) == (32, 64, 16)
diff --git a/src/libImaging/Convert.c b/src/libImaging/Convert.c
index 2b45d0cc4..d8c51d624 100644
--- a/src/libImaging/Convert.c
+++ b/src/libImaging/Convert.c
@@ -933,6 +933,7 @@ static struct {
     {"RGBA", "YCbCr", ImagingConvertRGB2YCbCr},
     {"RGBA", "HSV", rgb2hsv},
 
+    {"RGBa", "RGB", rgbA2rgba},
     {"RGBa", "RGBA", rgba2rgbA},
 
     {"RGBX", "1", rgb2bit},