Index: src/SymTab/Validate.cc
===================================================================
--- src/SymTab/Validate.cc	(revision fe26fbfeb1eddf74e6ddf2ee4ac0146237cac6eb)
+++ src/SymTab/Validate.cc	(revision fb7dca0f78acb8fb54669455e376357204e4aa2b)
@@ -629,5 +629,5 @@
 		} else {
 			TypeDeclMap::const_iterator base = typedeclNames.find( typeInst->get_name() );
-			assert( base != typedeclNames.end() );
+			assertf( base != typedeclNames.end(), "Can't find name %s", typeInst->get_name().c_str() );
 			typeInst->set_baseType( base->second );
 		} // if