/cp
2012-01-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51402
	* pt.c (lookup_template_class_1): Check context returned by
	tsubst for error_mark_node.

/testsuite
2012-01-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51402
	* g++.dg/template/crash110.C: New.

From-SVN: r183345