Bug 237339

[WinCairo][pywebsocket3] UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 640: character maps to <undefined> After r290580 started to use pywebsocket3 and Python 3, WinCairo testing buildbot is failing. Buildbot: builder WinCairo-64-bit-WKL-Release-Tests build 5738 https://build.webkit.org/#/builders/60/builds/5738 > webkitpy.layout_tests.servers.http_server_base.ServerError: Server exited On my PC, pywebsocket.ws.log-err.txt has the following error message: [2022-03-01 20:45:15,489] [CRITICAL] root: mod_pywebsocket: 'charmap' codec can't decode byte 0x9d in position 640: character maps to <undefined> [2022-03-01 20:45:15,489] [CRITICAL] root: mod_pywebsocket: Traceback (most recent call last): File "C:\home\webkit\gb\LayoutTests\imported\w3c\web-platform-tests\tools\third_party\pywebsocket3\mod_pywebsocket\standalone.py", line 470, in _main server = WebSocketServer(options) File "C:\home\webkit\gb\LayoutTests\imported\w3c\web-platform-tests\tools\third_party\pywebsocket3\mod_pywebsocket\websocket_server.py", line 90, in __init__ options.dispatcher = dispatch.Dispatcher( File "C:\home\webkit\gb\LayoutTests\imported\w3c\web-platform-tests\tools\third_party\pywebsocket3\mod_pywebsocket\dispatch.py", line 208, in __init__ self._source_handler_files_in_dir(root_dir, scan_dir, File "C:\home\webkit\gb\LayoutTests\imported\w3c\web-platform-tests\tools\third_party\pywebsocket3\mod_pywebsocket\dispatch.py", line 373, in _source_handler_files_in_dir handler_suite = _source_handler_file(handler_file.read()) File "C:\Python39\lib\encodings\cp1252.py", line 23, in decode return codecs.charmap_decode(input,self.errors,decoding_table)[0] UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 640: character maps to <undefined>