Accept error values of any type in TriblerProcess.set_error

src/tribler/core/utilities/process_manager/process.py

@@ -6,7 +6,7 @@
 import time
 from datetime import datetime, timedelta
 from enum import Enum
-from typing import List, Optional, TYPE_CHECKING, Union
+from typing import Any, List, Optional, TYPE_CHECKING
 
 import psutil
 
@@ -183,10 +183,15 @@ def set_api_port(self, api_port: int):
         self.api_port = api_port
         self.save()
 
-    def set_error(self, error: Union[str | Exception], replace: bool = False):
-        if isinstance(error, Exception):
+    def set_error(self, error: Any, replace: bool = False):
+        # It is expected for `error` to be str or an instance of exception, but values of other types
+        # are handled gracefully as well: everything except None is converted to str
+        if error is not None and not isinstance(error, str):
             error = f"{error.__class__.__name__}: {error}"
-        self.error_msg = error if replace else (self.error_msg or error)
+
+        if replace or not self.error_msg:
+            self.error_msg = error
+
         self.save()
 
     def finish(self, exit_code: Optional[int] = None):

src/tribler/core/utilities/process_manager/tests/test_process.py

@@ -107,6 +107,14 @@ def test_tribler_process_set_error(current_process):
               r"started='[^']+', duration='\d:\d{2}:\d{2}', error='ValueError: exception text'\)$"
     assert re.match(pattern, str(current_process))
 
+    # If the value of another type is specified, the method converts it to str
+    current_process.set_error({1: 2}, replace=True)
+    assert current_process.error_msg == 'dict: {1: 2}'
+
+    # None is not converted to str
+    current_process.set_error(None, replace=True)
+    assert current_process.error_msg is None
+
 
 def test_tribler_process_mark_finished(current_process):
     p = current_process  # for brevity