/cp
2018-04-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84630
	* pt.c (tsubst_lambda_expr): Check begin_lambda_type return value
	for error_mark_node.

/testsuite
2018-04-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84630
	* g++.dg/cpp0x/pr84630.C: New.