Alex Crichton 1f542cd264 Fix a pathological const checking case
The included test case would essentially never finish compiling without this
patch. It recursies twice at every ExprParen meaning that the branching factor
is 2^n

The included test case will take so long to parse on the old compiler that it'll
surely never let this crop up again.
2014-01-20 13:49:31 -08:00
..
2014-01-17 10:00:47 -08:00