re PR c++/28250 (ICE with invalid catch)

re PR c++/28250 (ICE with invalid catch)

	PR c++/28250
	PR c++/28257
	PR c++/28259
	PR c++/28267
	* toplev.c (compile_file): Return early on errorcount or sorrycount.
	* cgraphunit.c (cgraph_finalize_compilation_unit): Likewise.
	(cgraph_optimize): Likewise.

	PR c++/28250
	* g++.dg/eh/catch4.C: New test.

	PR c++/28257
	* g++.dg/other/qual1.C: New test.

	PR c++/28259
	* g++.dg/inherit/error2.C: New test.

	PR c++/28267
	* g++.dg/other/new1.C: New test.

	* g++.dg/warn/pr23075.C: Remove obsolete test.
	* g++.old-deja/g++.brendan/crash52.C: Remove dg-warning marker.
	* g++.old-deja/g++.jason/report.C: Remove dg-warning marker.

From-SVN: r115866