LAPACK-3.2.1 errata file
updated on Thu May 21 2009
maintained by J. Langou, U. Colorado Denver
Corrected in SVN -- to be released in 3.2.2
===========================================
(*) bug :: CSYEQUB/ZSYEQUB/SSYEQUB/DSYEQUB/CHEEQUB/CHEEQUB: EXTERNAL and INTRINSIC list are not accurate (or not even present)
(*) svn :: r660
o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
"c(he/sy)equb: no slamch in external lists and lsame, intrinsics not described"
Same problem for D and S versions and for the WORK array.
o committed by Julien Langou (SVN revision 660 on Sun May 10 2009)
(*) bug :: referencing WORK(1) and IWORK(1) when IJOB=0 in CTGSEN/DTGSEN/STGSEN/ZTGSEN contradicts header description
(*) svn :: r658,659
o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
"(d/s)tgsen.f: iwork(1) always referenced: line 455: iwork( 1 ) = LIWMIN, documentation says that
if IJOB=0 it shouldn't, so NULL pointer causes a segfault."
Same problem for C and Z versions and for the WORK array.
o committed by Julien Langou (SVN revision 658 and 659, on Sun May 10 2009)
(*) bug :: problem in workspace query for CGEESX/DGEESX/SGEESX/ZGEESX
(*) svn :: r657
o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
"(c/z)geesx: no lwork=-1 branch at all, info = -15 is returned while doing lquery."
The S and D versions were not exiting after WORKSPACE query as well.
o committed by Julien Langou (SVN revision 657, on Sun May 10 2009)
(*) bug :: in CHBGST/ZHBGST, reference to unitialized elements of RWORK in the DO 240 and DO 470 loops
(*) svn :: r656
o patch given by Lawrence Mulholland (NAG) on Wed May 06 2009
o see forum topic 1408
o committed by Julien Langou (SVN revision 656, on Sun May 10 2009)
Confirmed problems -- bug needs to be fixed!
============================================
(*) bug :: output argumement SCALE is not set when N=0
(*) project :: scalapack installer
o reported by Miska Le Louarn on Tue Mar 3 2009
o confirmed by Julie Langou on Tue Mar 3 2009
o see: emails
(*) bug :: 'make install' generates a "*** Error: Time for operations was zero" too easily
(*) bug :: negative flop counts can be generated by 'make install'
o reported by Sergei Steshenko on Thu Nov 20 2008
o see: emails
(*) bug :: in xGESDD, workspace query can overflow for large matrices
o reported by Stephan Ripke (Broad Institute, Boston) on Thu May 21 2009
o confirmed by Julien Langou on Thu May 21 2009
o see forum topic 1418
(*) bug :: in DGESDD, workspace query gives a value smaller than the minimal value given in the header to run the routine
o reported by Guy Bencteux on Sat Dec 06 2008
o see forum topic 846
(*) bug :: workspace query bug with DGEJSV (when only left or right singular vectors desired)
o reported by Allin Cottrell on Tue Jan 15 2009
o confirmed by Julien Langou on Fri Jan 30 2009
o see forum topic 866
o all information sent to Zlatko Drmac
Bug reports -- bug needs to be confirmed!
=========================================
(*) bug :: serious problem in DGESDD: DGESDD returns negative singular values with INFO = 0
o reported by Guy Bencteux on Sat Dec 06 2008
o see forum topic 847
(*) bug :: problem when playing with DGEEV and gfortran optimization flags
o reported by Pauli Virtanen (scipy team) on Sat Dec 06 2008 (email to lapack@cs.utk.edu)
o see: email from Pauli Virtanen
see: http://scipy.org/scipy/scipy/ticket/709
(*) bug :: misleading comment in the header of DGHEQZ, the 2x2 block of the real Schur form are not as claimed
o reported by Vasile Sima on Tue Jan 27 2009
o see: email from Vasile
o more information:
more specifically Vasile is reporting that the comments:
* [...] H contains the upper quasi-triangular
* matrix S from the generalized Schur factorization;
* 2-by-2 diagonal blocks (corresponding to complex conjugate
* pairs of eigenvalues) are returned in standard form, with
* H(i,i) = H(i+1,i+1) and H(i+1,i)*H(i,i+1) < 0.
are not correct
(*) bug :: failure of convergence of DHGEQZ for some specific matrix pencils
o reported by Vasile Sima on Thu Jan 22 2009
o see: email from Vasile
o more information at: lapack known issues
(*) bug :: problem of WORKSPACE query with DSTEDC
o reported by Tiago Requeijo on Mon Mar 30 2009
o see forum topic 1389
Deprecated routines
===================
(*) dead code :: xLAHRD is now replaced by xLAHR2, xLAHRD is a dead code since LAPACK 3.1
o xLAHRD will be removed at some point in the future from the distribution
Previous Errata (LAPACK 3.2.x)
==============================
o Sun May 10 2009 (LAPACK-3.2.1)
o Fri Apr 17 2009 (LAPACK-3.2.1)
o Tue Mar 10 2009 (LAPACK-3.2.0)
o Tue Mar 03 2009 (LAPACK-3.2.0)
o Mon Mar 02 2009 (LAPACK-3.2.0)
o Mon Feb 01 2009 (LAPACK-3.2.0)