Sanjoy Das b818676f6d Don't modify the DenseMap being iterated over from within the loop ...

that is iterating over it

Inserting elements into a `DenseMap` invalidated iterators pointing
into the `DenseMap` instance.

Differential Revision: http://reviews.llvm.org/D7924

llvm-svn: 230719

2015-02-27 02:24:16 +00:00

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