Simplify and pass a more useful source location when computing an exception specification for an implicit special member.
Simplify and pass a more useful source location when computing an exception
specification for an implicit special member.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@296068 91177308-0d34-0410-b5e6-96231b3b80d8

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