Index: lib/AST/ASTImporter.cpp
===================================================================
--- lib/AST/ASTImporter.cpp
+++ lib/AST/ASTImporter.cpp
@@ -2922,6 +2922,7 @@
   ToFunction->setVirtualAsWritten(D->isVirtualAsWritten());
   ToFunction->setTrivial(D->isTrivial());
   ToFunction->setPure(D->isPure());
+  ToFunction->setImplicit(D->isImplicit());
   Importer.Imported(D, ToFunction);
 
   // Set the parameters.