Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!YAHI.STANFORD.EDU!tiemann
From: tiemann@YAHI.STANFORD.EDU (Michael Tiemann)
Newsgroups: gnu.g++.bug
Subject: g++1.35 evaluates expression twice when destructor is virtual
Message-ID: <8908010244.AA02549@yahi.Stanford.EDU>
Date: 1 Aug 89 02:44:04 GMT
References: <465@tnosoes.UUCP>
Sender: daemon@tut.cis.ohio-state.edu
Reply-To: tiemann@lurch.stanford.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 20


    G++ evaluates the expression b.delfunc(this) twice.
    Discovered when porting ET++ [...]

Here is the fix (to function build_delete, near the top of the function):

*** cplus-init.c~	Fri Jul 28 14:56:18 1989
--- cplus-init.c	Mon Jul 31 19:39:05 1989
***************
*** 2704,2707 ****
--- 2704,2709 ----
  	  return expr;
  	}
+       if (TREE_VOLATILE (addr))
+ 	addr = save_expr (addr);
        ref = build_indirect_ref (addr, 0);
        ptr = 1;
yahi% 

Michael