It doesn't leak, it is refcounted by the compiler instance.

git-svn-id: http://root.cern.ch/svn/root/trunk@46560 27541ba8-7e3a-0410-8455-c3a389f83636

lib/Interpreter/CIFactory.cpp

@@ -152,7 +152,7 @@ namespace cling {
       return 0;
     }
     clang::CompilerInvocation*
-      Invocation = new clang::CompilerInvocation; // LEAKS!
+      Invocation = new clang::CompilerInvocation;
     clang::CompilerInvocation::CreateFromArgs(*Invocation, CC1Args->data() + 1,
                                               CC1Args->data() + CC1Args->size(),
                                               *Diagnostics);