update condition to align with source change

Author: 0g-peterzhb

tests/test_framework/blockchain_node.py

@@ -162,7 +162,7 @@ def stop(self, expected_stderr="", kill=False, wait=True):
         self.stderr.seek(0)
         stderr = self.stderr.read().decode("utf-8").strip()
         # TODO: Check how to avoid `pthread lock: Invalid argument`.
-        if stderr != expected_stderr and stderr != "pthread lock: Invalid argument":
+        if stderr != expected_stderr and stderr != "pthread lock: Invalid argument" and "pthread_mutex_lock" not in stderr:
             # print process status for debug
             if self.return_code is None:
                 self.log.info("Process is still running")