Re: Bug in zsh 4.0.7

[Peter Stephenson <pws@xxxxxxx>]

Chris Spiegel wrote:
> Hi,
>   There is a bug in Src/math.c of zsh 4.0.7, line 382.  It is:
>
> yyval.u.l = zstrtol(++ptr, &ptr, lastbase = 16);
>
> The issue is that it's unspecified whether ++ptr or &ptr happens first.

I don't think that matters.  &ptr always refers to the same address in
memory, whatever the value of ptr is.

                --- 	       	 ---
Value          | Y |	       	|Y+1|
               |---|	       	|---|
Address  &ptr->|   |   	  &ptr->|   |
                --- 		 ---

ptr has certainly been incremented by the time of the function call, so
the function call can change its value without any problem.

You're worrying about the case where we pass ptr as the second argument,
which as you say is undefined.

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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