[clang] add tests to ExprMutAnalyzer that reproduced a crash in ASTMatchers
Summary:
This patch adds two unit-tests that are the result of reducing a crashing TU
when running ExprMutAnalyzer over it. They are added only to ensure the regression
that has been fixed with https://reviews.llvm.org/D56444 don't creep back.
Reviewers: aaron.ballman, sammccall, rsmith, george.karpenkov
Reviewed By: sammccall
Subscribers: baloghadamsoftware, a.sidorin, Szelethus, donat.nagy, dkrupp, cfe-commits
Differential Revision: https://reviews.llvm.org/D56917
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@351743
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