no assert for one reference while destroying the Undo document

Change-Id: Idf9e0b2600d503ff50cd6269e8d528c0fad12a3e

1 files changed, 3 insertions, 2 deletions

diff --git a/sc/source/core/data/postit.cxx b/sc/source/core/data/postit.cxx
index 3addea4c948d..2c9646682a52 100644
--- a/sc/source/core/data/postit.cxx
+++ b/sc/source/core/data/postit.cxx
@@ -1106,8 +1106,9 @@ void ScPostIt::RemoveCaption()
         }
     }
     // Either the caption object is gone or, because of Undo or clipboard is
-    // held in at least two instances.
-    assert(!maNoteData.mxCaption || maNoteData.mxCaption.getRefs() >= 2);
+    // held in at least two instances, or the Undo document is just destroyed
+    // which leaves us with one reference.
+    assert(!maNoteData.mxCaption || maNoteData.mxCaption.getRefs() >= 2 || (mrDoc.IsUndo() && mrDoc.IsInDtorClear()));
     maNoteData.mxCaption.reset(nullptr);
 }