src/__init__.py tests/: Partial fix for #4928 - exception in Document.scrub().

We fix the original problem in _load_annot(), but there is a later exception.

Author: julian-smith-artifex-com

src/__init__.py

@@ -10187,7 +10187,7 @@ def _load_annot(self, name, xref):
             annot = JM_get_annot_by_name(page, name)
         else:
             annot = JM_get_annot_by_xref(page, xref)
-        if annot.m_internal:
+        if annot:
             return Annot(annot)
 
     def _makePixmap(self, doc, ctm, cs, alpha=0, annots=1, clip=None):

tests/resources/test_4928.pdf

@@ -2212,3 +2212,12 @@ def test_4907():
             print(f'{i=}')
             display_list = page.get_displaylist(annots=False)
             text_page = display_list.get_textpage()
+
+def test_4928():
+    path = os.path.normpath(f'{__file__}/../../tests/resources/test_4928.pdf')
+    with pymupdf.open(path) as document:
+        try:
+            document.scrub()
+        except Exception as e:
+            print(f'Ignoring expected exception: {e}')
+