Fix copyData based on #758

Lib/fontParts/base/base.py

@@ -216,8 +216,7 @@ def copyData(self, source):
             if isinstance(selfValue, BaseObject):
                 selfValue.copyData(sourceValue)
             else:
-                setattr(self, attr, sourceValue)
-
+                setattr(self, attr, deepcopy(sourceValue))
     # ----------
     # Exceptions
     # ----------
@@ -832,10 +831,10 @@ def _setIdentifier(self, value):
 def reference(obj):
     """
     This code returns a simple function that returns the given object.
-    This is a backwards compatibility function that is under review. 
-    See #749. We used to use weak references, but they proved 
-    problematic (see issue #71), so this function was put in place to 
-    make sure existing code continued to function. The need for it is 
+    This is a backwards compatibility function that is under review.
+    See #749. We used to use weak references, but they proved
+    problematic (see issue #71), so this function was put in place to
+    make sure existing code continued to function. The need for it is
     questionable, so it may be deleted soon.
     """
     def wrapper():

Lib/fontParts/test/test_info.py

@@ -122,6 +122,18 @@ def test_update(self):
         self.assertEqual(info1.familyName, "test2")
         self.assertEqual(info1.unitsPerEm, 2000)
 
+    # ----
+    # Copy
+    # ----
+    def test_copy(self):
+        info1 = self.getInfo_generic()
+        info1.postscriptBlueValues = [-10, 0, 50, 60]
+
+        info2 = info1.copy()
+        info2.postscriptBlueValues[0] = -2
+
+        self.assertNotEqual(info1.postscriptBlueValues, info2.postscriptBlueValues)
+
     # -------------
     # Interpolation
     # -------------