Objective-C bug and fix

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1 total messages Started by Chris Dodd Mon, 02 Nov 1992 09:05

#41

Author: Chris Dodd
Date: Mon, 02 Nov 1992 09:05

24 lines
1191 bytes

I'm not sure if this is the right place to send this; there doesn't
seem to be objc-specific bug mailing list.

Basically, the problem is that the receiver of every message expression
gets evaluated twice; this causes problems if the receiver-expression
has side effects.  Patch:

*** objc-actions.c.orig	Mon Nov  2 16:38:25 1992
--- objc-actions.c	Mon Nov  2 16:50:20 1992
***************
*** 2631,2636 ****
--- 2631,2638 ----
        if (statically_allocated)
  	receiver = build_unary_op (ADDR_EXPR, receiver, 0);
  
+       /* don't evaluate the receiver twice */
+       receiver = save_expr(receiver);
        self_object = receiver;
      }
    else

-------------------------------------------------------
Chris Dodd
dodd@csl.sri.com

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