Commits

Dmitri Hrybenko committed 56473c34cd1
stdlib: change out-of-bounds subscripting traps on mirrors to be _preconditionFailure()s. Some of these checks are clearly redundant (for example, the check of array subscript), but since we have no tests for these traps (and reflection is not fast in general), I prefer to keep this transformation as straightforward as possible. Swift SVN r20971