Index: Lib/optimize/__minpack.h
===================================================================
--- Lib/optimize/__minpack.h    (revision 2900)
+++ Lib/optimize/__minpack.h    (working copy)
@@ -585,7 +585,6 @@
   else {
     Py_DECREF(ap_fvec);
     Py_DECREF(ap_fjac);
-    Py_DECREF(ap_diag);
     Py_DECREF(ap_ipvt);
     Py_DECREF(ap_qtf);
     return Py_BuildValue("Ni",PyArray_Return(ap_x),info);