From: matz@... (Yukihiro Matsumoto)
Date: 2000-09-26T15:58:39+09:00
Subject: [ruby-talk:5130] Re: crashes in ruby-lex.rb

Hi,

In message "[ruby-talk:5129] crashes in ruby-lex.rb"
    on 00/09/26, "Brian F. Feldman" <green@FreeBSD.org> writes:

|I've gotten a few crashes when doing some weird things in irb (repeatable in 
|that they'd occur on line 178).  One example I now have which reliably 
|causes irb to segfault is to enter:

This is not caused by irb, but because that Module#dup did not copy
its metaclass.

--- object.c	2000/09/15 06:00:26	1.28
+++ object.c	2000/09/26 06:57:37
@@ -533,2 +531,11 @@
 static VALUE
+rb_mod_dup(module)
+    VALUE module;
+{
+    VALUE dup = rb_mod_clone(module);
+    OBJSETUP(dup, RBASIC(module)->klass, BUILTIN_TYPE(module));
+    return dup;
+}
+
+static VALUE
 rb_mod_to_s(klass)
@@ -1155,2 +1162,3 @@
     rb_define_method(rb_cModule, "clone", rb_mod_clone, 0);
+    rb_define_method(rb_cModule, "dup", rb_mod_dup, 0);
     rb_define_method(rb_cModule, "to_s", rb_mod_to_s, 0);