Michael G Schwern wrote:
On Wed, Jun 22, 2005 at 11:24:12AM -0000, Piotr Fusik wrote:
The "x" operator gives an unexpected result (i.e. null string)
with large right side operands.
perl580 -le "print 1x1e8 ne '' ? 'ok' : 'not ok'"
ok
perl580 -le "print 1x1e9 ne '' ? 'ok' : 'not ok'"
(crash)
I believe the issue is you're trying to allocate a string of 1 billion
characters, consuming about a gig of memory, and simply running out.
This falls under the "don't do that" category.
perl580 -le "print 1x1e10 ne '' ? 'ok' : 'not ok'"
not ok
Though I can't explain why this doesn't crash, too.
1e9 < 2**31 but 1e10 > 2**31 so it overflows when converted to an IV on
32 bits platforms.
Cheers,
- Salvador
