PR c++/34269
	* parser.c (cp_parser_simple_declaration): Don't commit
	to tentative parse if parse errors were seen.

	* g++.dg/cpp0x/decltype13.C: New test.
	* g++.dg/cpp0x/decltype-33837.C: Adjust dg-error pattern.
	* g++.dg/cpp0x/pr33839.C: Likewise.

From-SVN: r141793