PR17983: Fix crasher bug in C++1y mode when performing a non-global array
delete on a class which has no array cookie and has no class-specific operator
new.

llvm-svn: 196488
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 162e46e..846aba8 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -6192,6 +6192,10 @@
     Context.DeclarationNames.getCXXOperatorName(OO_Delete);
     if (FindDeallocationFunction(Loc, RD, Name, OperatorDelete))
       return true;
+    // If there's no class-specific operator delete, look up the global
+    // non-array delete.
+    if (!OperatorDelete)
+      OperatorDelete = FindUsualDeallocationFunction(Loc, true, Name);
 
     MarkFunctionReferenced(Loc, OperatorDelete);