backport: re PR c++/17618 (ICE in cp_convert_to_pointer, at cp/cvt.c:83)

backport: re PR c++/17618 (ICE in cp_convert_to_pointer, at cp/cvt.c:83)

	Backport:
	2004-09-23  Andrew Pinski  <pinskia@physics.uc.edu>
	PR c++/17618
	* cvt.c (cp_convert_to_pointer): Return early when the type is
	an error_mark_node.

	2004-05-22  Roger Sayle  <roger@eyesopen.com>
	* name-lookup.c (check_for_out_of_scope_variable): Avoid ICE by
	returning when TREE_TYPE is error_mark_node.
	* typeck.c (require_complete_type): Return error_mark_node if
	value's type is an error_mark_node.

	2004-11-02  Mark Mitchell  <mark@codesourcery.com>
	PR c++/18177
	* typeck.c (build_const_cast): Use error_operand_p.

	2004-09-23  Andrew Pinski  <pinskia@physics.uc.edu>
	PR c++/17618
	* g++.dg/lookup/crash5.C: New test.

	2004-05-22  Wolfgang Bangerth  <bangerth@dealii.org>
		    Roger Sayle  <roger@eyesopen.com>
	* g++.dg/lookup/forscope2.C: New test case.

	2004-11-02  Mark Mitchell  <mark@codesourcery.com>
	PR c++/18177
	* g++.dg/conversion/const3.C: New test.

From-SVN: r105210