From: Eric Hodel <drbrain@...7.net>
Date: 2007-12-13T09:11:21+09:00
Subject: Fix e2mmap.rb for 1.9

E2MM.Raise complains about $! being read-only now, and E2MM is used by  
RDoc.  The following patch makes E2MM 1.9 compatible.  May I check it  
in?

Index: lib/e2mmap.rb
===================================================================
--- lib/e2mmap.rb	(revision 14203)
+++ lib/e2mmap.rb	(working copy)
@@ -157,12 +157,14 @@ module Exception2MessageMapper
    #
    def E2MM.Raise(klass = E2MM, err = nil, *rest)
      if form = e2mm_message(klass, err)
-      $! = err.new(sprintf(form, *rest))
-      $@ = caller(1) if $@.nil?
+      exception = err.new(sprintf(form, *rest))
+      exception.set_backtrace caller(1) if $@.nil?
        #p $@
        #p __FILE__
-      $@.shift if $@[0] =~ /^#{Regexp.quote(__FILE__)}:/
-      raise
+      if exception.backtrace[0] =~ /^#{Regexp.quote(__FILE__)}:/ then
+        exception.backtrace.shift
+      end
+      raise exception
      else
        E2MM.Fail E2MM, ErrNotRegisteredException, err.inspect
      end