Call to NS_initWithCoder MUST be first, later code relies on a properly constructed object.

Tools/nib2cib/NSButton.j

@@ -165,26 +165,31 @@ _CPButtonBezelStyleHeights[CPHUDBezelStyle] = 20;
 
 - (id)initWithCoder:(CPCoder)aCoder
 {
-    // We need to do a bit of magic to determine if this is a checkbox or radio button.
-    var cell = [aCoder decodeObjectForKey:@"NSCell"],
-        alternateImage = [cell alternateImage];
+    var self = [self NS_initWithCoder:aCoder];
 
-    if ([alternateImage isKindOfClass:[NSButtonImageSource class]])
+    if (self)
     {
-        if ([alternateImage imageName] === @"NSSwitch")
-            _isCheckBox = YES;
+        // We need to do a bit of magic to determine if this is a checkbox or radio button.
+        var cell = [aCoder decodeObjectForKey:@"NSCell"],
+            alternateImage = [cell alternateImage];
 
-        else if ([alternateImage imageName] === @"NSRadioButton")
+        if ([alternateImage isKindOfClass:[NSButtonImageSource class]])
         {
-            _isRadio = YES;
-            self._radioGroup = [CPRadioGroup new];
+            if ([alternateImage imageName] === @"NSSwitch")
+                _isCheckBox = YES;
+
+            else if ([alternateImage imageName] === @"NSRadioButton")
+            {
+                _isRadio = YES;
+                self._radioGroup = [CPRadioGroup new];
+            }
         }
+
+        [self setKeyEquivalent:[cell keyEquivalent]];
+        _keyEquivalentModifierMask = [cell keyEquivalentModifierMask];
     }
 
-    [self setKeyEquivalent:[cell keyEquivalent]];
-    _keyEquivalentModifierMask = [cell keyEquivalentModifierMask];
-
-    return [self NS_initWithCoder:aCoder];
+    return self;
 }
 
 - (Class)classForKeyedArchiver