+

vulkan/vRegs2Vulkan.pas

@@ -2291,7 +2291,7 @@ begin
   6:Result:=VK_SWIZZLE_B;
   7:Result:=VK_SWIZZLE_A;
   else
-    Result:=VK_SWIZZLE_I; //what is the actual behavior when the value is incorrect?
+    Result:=VK_SWIZZLE_Z; //incorrect value is interpreted as 0
  end;
 end;
 

vulkan/vShaderExt.pas

@@ -744,7 +744,7 @@ begin
    'B':v:=6;
    'A':v:=7;
    else
-       v:=2; //error?
+       v:=0; //incorrect value is interpreted as 0
   end;
   case i of
    1:Result.x:=v;