re PR c++/42038 (ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p)

/cp
2010-01-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/42038
	* except.c (expand_start_catch_block): Deal correctly with
	do_begin_catch returning error_mark_node.

/testsuite
2010-01-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/42038
	* g++.dg/parse/crash55.C: New.

From-SVN: r156094