[Scipy-tickets] [SciPy] #1717: QZ segfault on Windows for 0.11.0rc1
SciPy Trac
scipy-tickets@scipy....
Tue Aug 7 18:29:44 CDT 2012
#1717: QZ segfault on Windows for 0.11.0rc1
--------------------------+-------------------------------------------------
Reporter: rgommers | Owner: somebody
Type: defect | Status: new
Priority: highest | Milestone: 0.11.0
Component: scipy.linalg | Version: devel
Keywords: |
--------------------------+-------------------------------------------------
Comment(by jseabold):
Or I guess it could be a compiler issue? The only change I see since 3.1.1
that effects dgges is revision 735 in lapack, though I don't think it
affects the sort. In fact, it seems to indicate that a change in a
subroutine after 3.1.1 led to unexpected behavior.
http://icl.cs.utk.edu/lapack-forum/viewtopic.php?f=2&t=1783
"We have changed xLARFG to xLARFP in xGEQR2. xGEQR2 is used by xDGGES. The
matrices are therefore different (although all of them are correct.)
However
for the matrix generated by xLARFP, xTGEX2 exceeds the THRES value
by 10%,
causing an error flag. We decided to increase THRES by a factor of
2.
Although the bug was triggered by the change from xLARFG to xLARFP,
XLARFP
is not really at guilt."
--
Ticket URL: <http://projects.scipy.org/scipy/ticket/1717#comment:8>
SciPy <http://www.scipy.org>
SciPy is open-source software for mathematics, science, and engineering.
More information about the Scipy-tickets
mailing list