Avoid a segfault: an event may kill the event object itself indirectly.

testdata/python/layObjects.py

@@ -0,0 +1,54 @@
+# KLayout Layout Viewer
+# Copyright (C) 2006-2023 Matthias Koefferlein
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+import pya
+import unittest
+
+class LAYObjectsTests(unittest.TestCase):
+
+  def test_1(self):
+
+    class MyBrowserSource(pya.BrowserSource):
+      def get(self, url):
+        next_url = "int:" + str(int(url.split(":")[1]) + 1)
+        return f"This is {url}. <a href='{next_url}'>Goto next ({next_url})</a>"
+      
+    dialog = pya.BrowserDialog()
+    dialog.home = "int:0"
+    dialog.source = MyBrowserSource()
+
+    dialog = pya.BrowserDialog()
+    dialog.home = "int:0"
+    dialog.source = MyBrowserSource()
+
+    self.assertEqual(True, True)
+
+
+# run unit tests
+if __name__ == '__main__':
+  suite = unittest.TestSuite()
+  # NOTE: Use this instead of loadTestsfromTestCase to select a specific test:
+  #   suite.addTest(BasicTest("test_26"))
+  suite = unittest.TestLoader().loadTestsFromTestCase(LAYObjectsTests)
+
+  # Only runs with Application available
+  if "Application" in pya.__all__ and not unittest.TextTestRunner(verbosity = 1).run(suite).wasSuccessful():
+    sys.exit(1)
+
+
+