[Python-Dev] KeyboardInterrupt on Windows

[Neal Norwitz]

On Fri, May 30, 2003 at 04:40:00PM -0400, Neal Norwitz wrote:
> On Fri, May 30, 2003 at 04:35:53PM -0400, Guido van Rossum wrote:
> > I received this problem report (Kurt is the IDLEFORK developer).  Does
> > anybody know what could be the matter here?  What changed recently???
> 
> >        while 1: pass
> > 
> > doesn't respond to a KeyboardInterrupt on Python2.3b1 on either
> > WinXP or W2K.

The patch below fixes the problem by not optimizing while 1:pass.  
Seems kinda hacky though.

Neal
--

Index: Python/compile.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Python/compile.c,v
retrieving revision 2.289
diff -w -u -r2.289 compile.c
--- Python/compile.c    22 May 2003 22:00:04 -0000      2.289
+++ Python/compile.c    30 May 2003 21:02:26 -0000
@@ -411,6 +411,8 @@
                                tgttgt -= i + 3;     /* Calc relative jump addr
*/
                        if (tgttgt < 0)           /* No backward relative jumps
*/
                                 continue;
+                       if (i == tgttgt && opcode == JUMP_ABSOLUTE)
+                               goto exitUnchanged;
                        codestr[i] = opcode;
                        SETARG(codestr, i, tgttgt);
                        break;