2 files changed, 13 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index d192a73a7..24f518d0e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Sep 25 00:18:11 2005  Tanaka Akira  <akr@m17n.org>
+
+	* eval.c (unknown_node): show more information.  [ruby-dev:26196]
+
 Sat Sep 24 08:56:01 2005  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/fileutils.rb (cd): no longer accept :noop option, related
diff --git a/eval.c b/eval.c
index b60fa4128..0140ed7d8 100644
--- a/eval.c
+++ b/eval.c
@@ -2814,7 +2814,15 @@ unknown_node(node)
     NODE *volatile node;
 {
     ruby_current_node = 0;
-    rb_bug("unknown node type %d", nd_type(node));
+    if (node->flags == 0) {
+        rb_bug("terminated node (0x%lx)", node);
+    }
+    else if (BUILTIN_TYPE(node) != T_NODE) {
+        rb_bug("not a node 0x%02lx (0x%lx)", BUILTIN_TYPE(node), node);
+    }
+    else {
+        rb_bug("unknown node type %d (0x%lx)", nd_type(node), node);
+    }
 }
 
 static VALUE