re PR c++/67409 (tree-cfg.c dereferences a NULL pointer)

re PR c++/67409 (tree-cfg.c dereferences a NULL pointer)

	PR c++/67409
	* decl.c (identify_goto): Add LOC and DIAG_KIND arguments, call
	emit_diagnostic instead of permerror.
	(check_previous_goto_1): Adjust identify_goto callers, treat all
	cases but crossing initialization and entering scope of decl with
	non-trivial dtor as unconditional hard errors.
	(check_goto): Use identify_goto.  Treat all cases but crossing
	initialization and entering scope of decl with non-trivial dtor
	as unconditional hard errors.

	* g++.dg/eh/goto3.C: New test.

Co-Authored-By: Manuel López-Ibáñez <manu@gcc.gnu.org>
From-SVN: r230613