Extended Description

Perhaps this is a violation of the spec and clang is right to disallow it, however it does crop up in "real world" code so it might be better for this to be a warning rather than an error. Here is a small example of what I'm talking about

p.s. As it happens the one use of this in the AVM code base is entirely frivolous and can easily be removed, but perhaps it affects other codebases...

void foo() {
union {
char *m_a;
int *m_b;
};
// some code

if(somecondition) {
	union {
		char *m_a;
		int *m_b;
	};
	// some code
}

}

Currently clang gives you the following error:

union-bug.cpp:11:10: error: member of anonymous union redeclares 'm_a'
char *m_a;
^
union-bug.cpp:5:9: note: previous declaration is here
char *m_a;