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errata_from_340_to_341.txt

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Bugs corrected from 3.4.0 to 3.4.1

bug0092 :: xLAED6 avoid div by zero

  • CORRECTED

  • Present in LAPACK 3.4.0

  • bug report by Mict Pont (NAG).

  • In the 40 loop - when DSCALE(I)=TAU you get a divide by zero (rare in practice). This can cause some compilers to immediately stop, e.g. the Sun compiler.

  • Sent directly yo Julie

  • corrected by Julie on Apr 18 2012

    == bug0091

    xLANHF div by zero

  • CORRECTED- see svn 1254, 1255

  • Present in LAPACK 3.4.0

  • bug report by Ake Sandgren, Umea University and HPC2N, on 10-22-2011.

  • See LAPACK Mailing list msg 01195

  • corrected by Rodney on Apr 11 2012

    == bug0090

    xGGEV and xGGEVX: Need to unscale if necessary when there is an error in DHGEQZ (QZ iteration failed)

  • CORRECTED - see svn 1231

  • Present in LAPACK 3.4.0

  • bug report by Hong Bo Peng, on 03-19-2012.

  • See LAPACK Mailing list msg 01257

  • corrected by Julie on Mar 20 2012

    == bug0089

    unused external declarations

  • CORRECTED - see svn 1091

  • Present in LAPACK 3.4.0

  • bug report by Ake Sandgren, Umea University and HPC2N, on 11-16-2011.

  • See LAPACK Mailing list msg 01176

    == bug0088

    Uninitialized variable bug in ZHERFSX

  • CORRECTED- see svn 1262, 1263

  • Present in LAPACK 3.4.0

  • bug report by Mick Pont from NAG on Sat, 30 Nov 2011

  • See forum topic 2893

  • corrected by Julie on April 11 2012

    == bug0087

    Wrong call name for XBLAS xLA_RPVGRW, needs to be xLA_GERPVGRW

  • CORRECTED - see svn 1128

  • Present in LAPACK 3.4.0

  • bug detected and corrected by Julie

    == bug0086

    ILAxLR:commit r1006 reverts the change made in commit r977

  • CORRECTED - see svn 1099

  • Present in LAPACK 3.4.0

  • bug report by Ake Sandgren on Sat, 22 Oct 2011

  • See LAPACK Mailing list msg 01149

    == bug0085

    xGESVD Problem in Workspace computation

  • CORRECTED - see svn 1207

  • Present in LAPACK 3.4.0

  • bug report by Marco on Nov 18th 2011

  • See forum topic 2861

  • Problem in Workspace computation

  • corrected by Julie on Jan 6 2012

    == bug0028

    failure of convergence of DHGEQZ for some specific matrix pencils

  • CORRECTED

  • reported by Vasile Sima on Thu Jan 22 2009

  • see: email from Vasile

  • more information at: see lapack known issues

  • related to bug0026 below

  • Confirmed by Rodney on Tue, 08 Feb 2011

  • committed by Rodney on Tue Apr 17 2012

    == bug0026

    problem when playing with DGEEV and gfortran optimization flags

  • CORRECTED

  • reported by Pauli Virtanen (scipy team) on Sat Dec 06 2008 (email to [email protected])

  • see: email from Pauli Virtanen see: http://scipy.org/scipy/scipy/ticket/709

  • Confirmed by Rodney on Tue, 08 Feb 2011

  • A patch has been proposed by Hong Bo Peng.

  • Issue was actually in DHGEQZ, the update to B22 was missing

  • See LAPACK Mailing list msg 1273

  • committed by Rodney on Tue Apr 3 2012