=================== BUG #6743: FULL BUG SNAPSHOT ===================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=6743&group_id=99
Submitted by: moseshall Project: GNUstep
Submitted on: Tue 11/25/2003 at 03:06
Category: Base/Foundation Severity: 5 - Major
Bug Group: Bug Resolution: None
Assigned to: None Status: Open
Summary: Distinct NSNumbers with the same value dealloc each other
Original Submission: Distinct NSNumbers with the *same value* can dealloc each other.
The following code snippet crashes gnustep-base 1.7.3 possibly because of NSNumber
caching. If I don't call [n1 release] there is no crash. If this is due to caching
strategy, then it can make NSNumber very fragile when numbers are expected to persist
as long as retained.
#include <Foundation/Foundation.h>
int main (int argc, const char *argv[], const char *env[])
{
NSNumber* n1 = [NSNumber numberWithLong:1];
NSNumber* n2 = [NSNumber numberWithLong:1];
NSLog(@"%@(%d)n", n1, [n1 retainCount]);
NSLog(@"%@(%d)n", n2, [n2 retainCount]);
[n1 release]; //<--problem here
// The next line crashes. n2 has gone away!
NSLog(@"%@(%d)n", n2, [n2 retainCount]);
return 0;
}
Thanks for your attention.
Brian 'Moses' Hall
[EMAIL PROTECTED]
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http://savannah.gnu.org/bugs/?func=detailbug&bug_id=6743&group_id=99
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