Error building 12.13.1-proposal branch with Python 3: gyp-mac-tool: cannot use a string pattern on a byte-like object

[cakoose]

I read that Node 12.13.1 is adding preliminary/experimental support for building with Python 3 (#30352). Filing this in case it's useful for that effort.

Node: 12.13.1-proposal branch (481b503)
MacOS 10.14.6
Python: 3.8.0

$ make -j4
...
Traceback (most recent call last):
  File "./gyp-mac-tool", line 711, in <module>
    sys.exit(main(sys.argv[1:]))
  File "./gyp-mac-tool", line 31, in main
    exit_code = executor.Dispatch(args)
  File "./gyp-mac-tool", line 46, in Dispatch
    return getattr(self, method)(*args[1:])
  File "./gyp-mac-tool", line 268, in ExecFilterLibtool
    if not libtool_re.match(line) and not libtool_re5.match(line):
TypeError: cannot use a string pattern on a bytes-like object
...

(I'm not blocked; I'm able to build with Python 2.)

[targos]

@cakoose thanks for trying it! Does #30272 fix the build for you?

[cakoose]

I cherry-picked 0673dfc and the build worked with Python 3.8.0!

[targos]

Fix included in v12.13.1-proposal.