Fixed bug in saving to fp-objects in Python >= 3.4

PIL/Image.py

@@ -1659,7 +1659,7 @@ class Image(object):
             if isinstance(fp, Path):
                 filename = str(fp)
                 open_fp = True
-        elif hasattr(fp, "name") and isPath(fp.name):
+        if not filename and hasattr(fp, "name") and isPath(fp.name):
             # only set the name for metadata purposes
             filename = fp.name
 

Tests/test_image.py

@@ -63,6 +63,18 @@ class TestImage(PillowTestCase):
             os.remove(temp_file)
         im.save(Path(temp_file))
 
+    def test_fp_name(self):
+        temp_file = self.tempfile("temp.jpg")
+
+        class FP(object):
+            def write(a, b):
+                pass
+        fp = FP()
+        fp.name = temp_file
+
+        im = hopper()
+        im.save(fp)
+
     def test_tempfile(self):
         # see #1460, pathlib support breaks tempfile.TemporaryFile on py27
         # Will error out on save on 3.0.0