Merge #13440: qa: Log as utf-8

fa8071a098 qa: Log as utf-8 (MarcoFalke)

Pull request description:

  Explicitly read and write the log files with utf-8 as encoding

Tree-SHA512: ca28f37f34a09845c736ff6c4c21733c3c39584f52c81e48ff25e5e35979c317d0989862b2b93acc7e359fbcc20b99533365455830b2ddb41eb4d8c17314534e

test/functional/combine_logs.py

@@ -63,7 +63,7 @@ def get_log_events(source, logfile):
     Log events may be split over multiple lines. We use the timestamp
     regex match as the marker for a new log event."""
     try:
-        with open(logfile, 'r') as infile:
+        with open(logfile, 'r', encoding='utf-8') as infile:
             event = ''
             timestamp = ''
             for line in infile:

test/functional/test_framework/test_framework.py

@@ -359,7 +359,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         self.log = logging.getLogger('TestFramework')
         self.log.setLevel(logging.DEBUG)
         # Create file handler to log all messages
-        fh = logging.FileHandler(self.options.tmpdir + '/test_framework.log')
+        fh = logging.FileHandler(self.options.tmpdir + '/test_framework.log', encoding='utf-8')
         fh.setLevel(logging.DEBUG)
         # Create console handler to log messages to stderr. By default this logs only error messages, but can be configured with --loglevel.
         ch = logging.StreamHandler(sys.stdout)