[Coin-discuss] Re:lpSimplex crash-----scale

[Gabrielle A. Grün]

Hi COIN people,,

I have narrowed down the crash location to lines 1730 and 1731 of 
ClpPackedMatrix.cpp, “  ClpPackedMatrix* rowCopy =
    dynamic_cast< ClpPackedMatrix*>(rowCopyBase);”. One cannot  use 
dyanamuc_cast    to convert a base class  object to a child class object. 
When these lines are replaced by the following:


ClpPackedMatrix  * rowCopy= new  ClpPackedMatrix ();

  rowCopy->type_ = rowCopyBase->type();
  delete [] rowCopy->getRhsOffset();
    int numberRows1 = rowCopyBase->getNumRows();
    if (rowCopyBase->getRhsOffset() &&numberRows1) {
      rowCopy->rhsOffset_= 
ClpCopyOfArray(rowCopyBase->getRhsOffset(),numberRows1);
    } else {
      rowCopy->rhsOffset_=NULL;
    }
    rowCopy->startFraction_ = rowCopyBase->startFraction();
    rowCopy->endFraction_ = rowCopyBase->endFraction();
   rowCopy-> savedBestDj_ = rowCopyBase->savedBestDj();
   rowCopy->originalWanted_ = rowCopyBase->originalWanted();
    rowCopy->currentWanted_ = rowCopyBase->currentWanted();
   rowCopy->savedBestSequence_ = rowCopyBase->savedBestSequence();
   rowCopy->lastRefresh_ = rowCopyBase->lastRefresh();
   rowCopy->refreshFrequency_ = rowCopyBase->refreshFrequency();
   rowCopy->minimumObjectsScan_ = rowCopyBase->minimumObjectsScan();
   rowCopy->minimumGoodReducedCosts_ = 
rowCopyBase->minimumGoodReducedCosts();
   rowCopy->trueSequenceIn_ = rowCopyBase->getTrueSequenceIn();
   rowCopy->trueSequenceOut_ = rowCopyBase->getTrueSequenceOut();
    rowCopy->skipDualCheck_ = rowCopyBase->skipDualCheck();



The crash occurs at line 1739 “const int * column = rowCopy->getIndices();” 
ss rowCopy->index_ appears to be never set. Thanks.









Gabrielle A. Grün, Ph.D. Student
School of Computing Science
Simon Fraser University
8888 University Drive
Burnaby, BC
V5A 1S6
<http://www.cs.sfu.ca/~grun>