Pattern parse bug

[sn6uv]

In[1]:= f[x:(_..)]
Syntax::sntxf: "f[x:(_.." cannot be followed by ")]" (line 1 of "<stdin>").

Expected f[Pattern[x, Repeated[Blank[]]]]

Traceback (most recent call last):
  File "matcher.py", line 326, in <module>
    tests.append((_parse(expr), _parse(patt), (slots, names)))
  File "matcher.py", line 269, in _parse
    return parse(definitions, SingleLineFeeder(expr_string))
  File "/home/angus/Mathics/mathics/core/parser/util.py", line 25, in parse
    ast = parser.parse(feeder)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 39, in parse
    return self.parse_e()
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 76, in parse_e
    result.append(self.parse_exp(0))
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 94, in parse_exp
    new_result = method(result, token, p)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 474, in e_RawLeftBracket
    seq = self.parse_seq()
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 171, in parse_seq
    result.append(self.parse_exp(0))
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 94, in parse_exp
    new_result = method(result, token, p)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 541, in e_RawColon
    expr2 = self.parse_exp(q + 1)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 85, in parse_exp
    result = self.parse_p()
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 121, in parse_p
    return method(token)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 254, in p_RawLeftParenthesis
    result = self.parse_exp(0)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 98, in parse_exp
    new_result = self.parse_binary(result, token, p)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 215, in parse_binary
    expr2 = self.parse_exp(q)
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 85, in parse_exp
    result = self.parse_p()
  File "/home/angus/Mathics/mathics/core/parser/parser.py", line 129, in parse_p
    raise InvalidSyntaxError()

[sn6uv]

Minimal example is _.. which should be Repeated[Blank[]] but is treated as incomplete.