[issue16335] Integer overflow in unicode-escape decoder

[Terry J. Reedy]

Terry J. Reedy added the comment:

>>> x=(b'\\N{WHITE SMILING FACE' + b'x' * 2**16 + b'}')
>>> y=x.decode('unicode-escape')
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    y=x.decode('unicode-escape')
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 0-65557: unknown Unicode character name
>>> x=(b'\\N{WHITE SMILING FACE}')
>>> y=x.decode('unicode-escape')
>>> y
'☺'

A manageable number of extra spaces raises (I presume correctly), an unmagageable number are ignored (as it seems), is bizarre. Creating the long version took about 15 seconds on a fast machine, so test should be limited to test all (slowly) on machine with high memory.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16335>
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