system's gcc bug?
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed Mar 31 02:20:41 PST 2004
In message <20040331101834.GA21652 at dyn-099164.nbw.tue.nl>, Rene Ladan writes:
>
>--rwEMma7ioTxnRzrJ
>Content-Type: text/plain; charset=us-ascii
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>
>Hi,
>
>I'm getting runtime errors when executing the following program and
>declaring one of the arrays:
>
>----------------
>
>#include <stdio.h>
>
>int main(void) {
>/* int a[4] = { 0, 1, 2, 3 }; enable this line to get a buserror */
> int *i;
>/* int b[4] = { 0, 1, 2, 3 }; enable this line to get a segfault */
> for (*i = 0; *i < 4; (*i)++)
> printf("%p %i\n", i, *i);
> return(0);
> }
You have allocated no storage backing for *i, so your for loop writes
the integers 0...3 to a random place in memory.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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