"\U"-style escape sequences cannot be loaded if python was not compiled with UCS4

[anonymous]

If python was built with UCS2 (the default, for example, on OS X), you get:

>>> yaml.load('"\U0001D10C"')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/yaml/__init__.py", line 71, in load
    return loader.get_single_data()
  File "/Library/Python/2.7/site-packages/yaml/constructor.py", line 37, in get_single_data
    node = self.get_single_node()
  File "/Library/Python/2.7/site-packages/yaml/composer.py", line 35, in get_single_node
    if not self.check_event(StreamEndEvent):
  File "/Library/Python/2.7/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
  File "/Library/Python/2.7/site-packages/yaml/parser.py", line 143, in parse_implicit_document_start
    StreamEndToken):
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 116, in check_token
    self.fetch_more_tokens()
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 248, in fetch_more_tokens
    return self.fetch_double()
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 656, in fetch_double
    self.fetch_flow_scalar(style='"')
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 667, in fetch_flow_scalar
    self.tokens.append(self.scan_flow_scalar(style))
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 1156, in scan_flow_scalar
    chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
  File "/Library/Python/2.7/site-packages/yaml/scanner.py", line 1223, in scan_flow_scalar_non_spaces
    chunks.append(unichr(code))
ValueError: unichr() arg not in range(0x10000) (narrow Python build)
>