Fix indexing error in PCHStmtReader::VisitArraySubscriptExpr().


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70046 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index 26b9158..edb17c7 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -799,7 +799,7 @@
 unsigned PCHStmtReader::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
   VisitExpr(E);
   E->setLHS(cast<Expr>(StmtStack[StmtStack.size() - 2]));
-  E->setRHS(cast<Expr>(StmtStack[StmtStack.size() - 2]));
+  E->setRHS(cast<Expr>(StmtStack[StmtStack.size() - 1]));
   E->setRBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
   return 2;
 }