re PR c++/26789 (ICE on incomplete struct with -fmudflap)

	PR mudflap/26789
	* tree-mudflap.c (mf_xform_derefs_1): Return early on error_mark_node.

From-SVN: r112296

gcc/ChangeLog

 2006-03-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
+	PR mudflap/26789
+	* tree-mudflap.c (mf_xform_derefs_1): Return early on error_mark_node.
+
+2006-03-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
 	PR driver/22600
 	* system.h (ICE_EXIT_CODE): New macro.
 	* diagnostic.c (diagnostic_count_diagnostic): Exit with ICE_EXIT_CODE.

gcc/tree-mudflap.c

@@ -728,6 +728,10 @@ mf_xform_derefs_1 (block_stmt_iterator *iter, tree *tp,
 
   t = *tp;
   type = TREE_TYPE (t);
+
+  if (type == error_mark_node)
+    return;
+
   size = TYPE_SIZE_UNIT (type);
 
   switch (TREE_CODE (t))