[Matrix-SIG] Python crash when sort is given zero length list

[Charles G Waldman]

Travis E. Oliphant writes:

 > >>> from Numeric import sort
 > >>> sort([])
 > Floating point exception

This was quite easy to fix.  Here's the (one-line) patch.


--- multiarraymodule.c.orig     Thu Aug 20 14:59:22 1998
+++ multiarraymodule.c  Tue Dec 15 11:17:11 1998
@@ -390,6 +390,7 @@
 
        elsize = ap->descr->elsize;
        m = ap->dimensions[ap->nd-1];
+       if (m==0) goto fail;
        n = PyArray_SIZE(ap)/m;
        for (ip = ap->data, i=0; i<n; i++, ip+=elsize*m) {
                qsort(ip, m, elsize, compare_func);