fixes #11525

tests/ccgbugs/tobjconstr_bad_aliasing.nim

@@ -1,6 +1,9 @@
 discard """
   output: '''(10, (20, ))
-42'''
+42
+(x: 900.0, y: 900.0)
+(x: 900.0, y: 900.0)
+(x: 900.0, y: 900.0)'''
 """
 
 import strutils, sequtils
@@ -37,3 +40,37 @@ var x = X(v: 42)
 
 x = X(v: f(x.v))
 echo x.v
+
+
+# bug #11525
+type
+  Point[T] = object
+    x, y: T
+
+proc adjustPos[T](width, height: int, pos: Point[T]): Point[T] =
+  result = pos
+
+  result = Point[T](
+    x: pos.x - (width / 2),
+    y: pos.y - (height / 2)
+  )
+
+proc adjustPos2[T](width, height: int, pos: Point[T]): Point[T] =
+  result = pos
+
+  result = Point[T](
+    x: result.x - (width / 2),
+    y: result.y - (height / 2)
+  )
+
+proc adjustPos3(width, height: int, pos: Point): Point =
+  result = pos
+
+  result = Point(
+    x: result.x - (width / 2),
+    y: result.y - (height / 2)
+  )
+
+echo adjustPos(200, 200, Point[float](x: 1000, y: 1000))
+echo adjustPos2(200, 200, Point[float](x: 1000, y: 1000))
+echo adjustPos3(200, 200, Point[float](x: 1000, y: 1000))