Index: lib/StaticAnalyzer/Checkers/MallocChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/MallocChecker.cpp	(revisione 285953)
+++ lib/StaticAnalyzer/Checkers/MallocChecker.cpp	(copia locale)
@@ -1026,8 +1026,7 @@
   ASTContext &AstContext = C.getASTContext();
   CharUnits TypeSize = AstContext.getTypeSizeInChars(ElementType);
 
-  if (Optional<DefinedOrUnknownSVal> DefinedSize =
-          ElementCount.getAs<DefinedOrUnknownSVal>()) {
+  if (ElementCount.getAs<NonLoc>()) {
     DefinedOrUnknownSVal Extent = Region->getExtent(svalBuilder);
     // size in Bytes = ElementCount*TypeSize
     SVal SizeInBytes = svalBuilder.evalBinOpNN(