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Postings from May 2010
On Tue, May 11, 2010 at 09:38, Nicholas Clark <nick@ccl4.org> wrote:
> On Tue, May 11, 2010 at 04:31:16PM +0100, Nicholas Clark wrote:
>> On Tue, May 11, 2010 at 09:26:45AM -0600, Curtis Jewell wrote:
>> > On Tue, 11 May 2010 15:22 +0100, hv@crypt.org wrote:
>> > > hv@crypt.org wrote:
>> > > :Alex Hunsaker <badalex@gmail.com> wrote:
>> > > ::$ ./perl -Ilib/ -e 'sort glob("*")'
>> > > ::Segmentation fault
>> > > :
>> > > :I get the same result with gcc-4.5.0 here, only with -Dusemultiplicity.
>> > > [...]
>> > > :I'll try to distil this down to a bug report for gcc.
>> > >
>> > > Now submitted as <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44081>.
>> >
>> > And already marked as invalid there (it may have been distilled too far
>> > for them to notice the bug?)
>>
>> I suspect that the reader/rejector assumed that the indexes for notnull()
>> start at 0. They start at 1. If you make that mistake, you would conclude
>> (wrongly) what the rejector did.
>
> Gah. I think I'm wrong here. I'm not convinced that the test case is correct.
No I think you are right. I (and the rejector) were wrong.
From: http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
nonnull (arg-index, ...)
The nonnull attribute specifies that some function parameters should
be non-null pointers. For instance, the declaration:
extern void *
my_memcpy (void *dest, const void *src, size_t len)
__attribute__((nonnull (1, 2)));
causes the compiler to check that, in calls to my_memcpy, arguments
dest and src are non-null. If the compiler determines that a
OK so dest == 1 and src == 2, starts at 1 :-)
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