re PR c++/10108 (tree checking ICE: expected var_decl, have error_mark in tsubst_decl)

	PR c++/10108
	* pt.c (tsubst_decl) <TEMPLATE_DECL>: Add a check for
	error_mark_node.

	* g++.dg/template/crash7.C: New test.

From-SVN: r69409

gcc/cp/ChangeLog

+2003-07-15  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/10108
+	* pt.c (tsubst_decl) <TEMPLATE_DECL>: Add a check for
+	error_mark_node.
+
 2003-07-14  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/11509

gcc/cp/pt.c

@@ -5837,6 +5837,8 @@ tsubst_decl (tree t, tree args, tree type, tsubst_flags_t complain)
 	else
 	  {
 	    tree new_decl = tsubst (decl, args, complain, in_decl);
+	    if (new_decl == error_mark_node)
+	      return error_mark_node;
 
 	    DECL_TEMPLATE_RESULT (r) = new_decl;
 	    DECL_TI_TEMPLATE (new_decl) = r;

gcc/testsuite/ChangeLog

+2003-07-15  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/10108
+	* g++.dg/template/crash7.C: New test.
+
 2003-07-15  Kazu Hirata  <kazu@cs.umass.edu>
 
 	PR target/10795

gcc/testsuite/g++.dg/template/crash7.C

+// { dg-do compile }
+
+// Origin: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
+
+// PR c++/10108: ICE in tsubst_decl for error due to non-existence
+// nested type.
+
+template <typename> struct A
+{					// { dg-error "candidates" }
+    template <typename> A(typename A::X) {} // { dg-error "no type" }
+};
+
+A<void> a;	// { dg-error "instantiated|no match" }