Richard Smith 42fd9efa38 Revert r107690 (for PR7417) and add a testcase that it breaks. The approach of ...

that change turns out to not be reasonable: mutating the AST of a parsed
template during instantiation is not a sound thing to do, does not work across
chained PCH / modules builds, and is in any case a special-case workaround to a
more general problem that should be solved centrally.

llvm-svn: 249342

2015-10-05 20:05:21 +00:00

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