Traceback: Don't use path.replaceWith() with a source string

[mythmon]

This has come up in CI. @Osmose said that path.replaceWith() is a Babel thing. I bet this has something to do with unpinned Node dependencies, and possibly Babili.

Traceback:

webpack_loader.exceptions.WebpackError:              Error in              unknown: Don't use `path.replaceWith()` with a source string, use `path.replaceWithSourceString()`
self = <test_views.TestSelfRepair object at 0x7fb69d6e6a58>
client = <django.test.client.Client object at 0x7fb69d6ef908>

    @pytest.mark.django_db
    def test_doesnt_redirect(self, client):
>       assert client.get(self.url).status_code == 200

normandy/selfrepair/tests/test_views.py:28: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/local/lib/python3.6/site-packages/django/test/client.py:529: in get
    **extra)
/usr/local/lib/python3.6/site-packages/django/test/client.py:333: in get
    return self.generic('GET', path, secure=secure, **r)
/usr/local/lib/python3.6/site-packages/django/test/client.py:409: in generic
    return self.request(**r)
/usr/local/lib/python3.6/site-packages/django/test/client.py:494: in request
    six.reraise(*exc_info)
/usr/local/lib/python3.6/site-packages/django/utils/six.py:686: in reraise
    raise value
/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py:42: in inner
    response = get_response(request)
/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py:187: in _get_response
    response = self.process_exception_by_middleware(e, request)
/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py:185: in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
normandy/base/decorators.py:17: in wrapped_view
    return view_func(*args, **kwargs)
/usr/local/lib/python3.6/site-packages/django/views/decorators/cache.py:43: in _cache_controlled
    response = viewfunc(request, *args, **kw)
normandy/selfrepair/views.py:19: in repair
    'classify_client_url': classify_client_url,
/usr/local/lib/python3.6/site-packages/django/shortcuts.py:30: in render
    content = loader.render_to_string(template_name, context, request, using=using)
/usr/local/lib/python3.6/site-packages/django/template/loader.py:68: in render_to_string
    return template.render(context, request)
/usr/local/lib/python3.6/site-packages/django/template/backends/django.py:66: in render
    return self.template.render(context)
/usr/local/lib/python3.6/site-packages/django/template/base.py:208: in render
    return self._render(context)
/usr/local/lib/python3.6/site-packages/django/test/utils.py:94: in instrumented_test_render
    return self.nodelist.render(context)
/usr/local/lib/python3.6/site-packages/django/template/base.py:994: in render
    bit = node.render_annotated(context)
/usr/local/lib/python3.6/site-packages/django/template/base.py:961: in render_annotated
    return self.render(context)
/usr/local/lib/python3.6/site-packages/django/template/library.py:203: in render
    output = self.func(*resolved_args, **resolved_kwargs)
normandy/base/templatetags/normandy_webpack_loader.py:19: in render_bundle
    chunks = get_files(bundle_name, extension=extension, config=config)
/usr/local/lib/python3.6/site-packages/webpack_loader/templatetags/webpack_loader.py:67: in get_files
    return list(_get_bundle(bundle_name, extension, config))
/usr/local/lib/python3.6/site-packages/webpack_loader/templatetags/webpack_loader.py:32: in _get_bundle
    bundle = get_loader(config).get_bundle(bundle_name)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <webpack_loader.loader.WebpackLoader object at 0x7fb69e0c6e10>
bundle_name = 'selfrepair'

    def get_bundle(self, bundle_name):
        assets = self.get_assets()
    
        if settings.DEBUG:
            # poll when debugging and block request until bundle is compiled
            # TODO: support timeouts
            while assets['status'] == 'compiling':
                time.sleep(self.config['POLL_INTERVAL'])
                assets = self.get_assets()
    
        if assets.get('status') == 'done':
            chunks = assets['chunks'][bundle_name]
            return self.filter_chunks(chunks)
    
        elif assets.get('status') == 'error':
            if 'file' not in assets:
                assets['file'] = ''
            error = u"""
                {error} in {file}
                {message}
                """.format(**assets)
>           raise WebpackError(error)
E           webpack_loader.exceptions.WebpackError: 
E                       Error in 
E                       unknown: Don't use `path.replaceWith()` with a source string, use `path.replaceWithSourceString()`

/usr/local/lib/python3.6/site-packages/webpack_loader/loader.py:74: WebpackError

[Osmose]

Babili's got a bug on file for this: babel/minify#576

[Osmose]

Locally I'm actually getting a different set of errors that seem to be related to babel/minify#577.

I put up #813, which fixed my local issues, in an attempt to see if it also fixes these issues.