test fix of #2556

Ensure  #2556 is fixed properly.

tests/test_drawings.py

@@ -175,3 +175,17 @@ def test_2462():
     doc = fitz.open(f"{scriptdir}/resources/test-2462.pdf")
     page = doc[0]
     vg = page.get_drawings(extended=True)
+
+
+def test_2556():
+    """Ensure that incomplete clip paths will be properly ignored."""
+    doc = fitz.open()  # new empty PDF
+    page = doc.new_page()  # new page
+    # following contains an incomplete clip
+    c = b"q 50 697.6 400 100.0 re W n q 0 0 m W n Q "
+    xref = doc.get_new_xref()  # prepare /Contents object for page
+    doc.update_object(xref,"<<>>")  # new xref now is a dictionary
+    doc.update_stream(xref, c)  # store drawing commands
+    page.set_contents(xref)  # give the page this xref as /Contents
+    # following will bring down interpreter if fix not installed
+    assert page.get_drawings(extended=True)