unit test. does not reproduce the crash

tests/test_rf.py

@@ -4,6 +4,7 @@ import unittest
 from qgis.core import QgsProcessingContext, QgsProcessingFeedback
 
 from ..random_forest import RFAlgorithm
+from ..similarity import SimilarityAlgorithm
 from ..utils.misc import get_file_md5_hash
 
 
@@ -13,6 +14,7 @@ class TestRFAlgorithm(unittest.TestCase):
         self.context = QgsProcessingContext()
         self.feedback = QgsProcessingFeedback()
         self.algorithm = RFAlgorithm()
+        self.sim = SimilarityAlgorithm()
 
     def test_valid_parameters(self):
         self.algorithm.initAlgorithm()
@@ -23,9 +25,21 @@ class TestRFAlgorithm(unittest.TestCase):
         assert result_file_hash == '80b7dd5b5ad5a4c0ad1d637fa20cf8b0'
         os.remove(expected_result_path)
 
+    def test_rf_then_sim(self):
+        self.algorithm.initAlgorithm()
+        parameters = {}
+        result = self.algorithm.processAlgorithm(parameters, self.context, self.feedback)
+        self.sim.initAlgorithm()
+        parameters = {}
+        result = self.sim.processAlgorithm(parameters, self.context, self.feedback)
+        self.algorithm.initAlgorithm()
+        parameters = {}
+        result = self.algorithm.processAlgorithm(parameters, self.context, self.feedback)
+
 
 if __name__ == "__main__":
 
     test_algo = TestRFAlgorithm()
     test_algo.setUp()
     test_algo.test_valid_parameters()
+    test_algo.test_rf_then_sim()