[Coin-lpsolver] checkClear() in createRim() and NDEBUG compilation flag

[John J Forrest]

Francois,

If it fails it is a serious bug.  The checkClear is expensive so should 
not be in for production work.  Try if a clear() before gets rid of error 
and if so move clear up into whatever code calls it.  If you tell me a bit 
more I will try and fix.

John



Francois Margot <fmargot at andrew.cmu.edu> 
Sent by: coin-lpsolver-bounces at list.coin-or.org
08/13/2005 06:49 AM

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Subject
[Coin-lpsolver] checkClear() in createRim() and NDEBUG compilation flag







If I want to compile an optimized version of Clp (-O) should I use the
flag NDEBUG or not? In Makefile.Clp, I have:

  ifeq ($(OptLevel),-g)
#     CXXFLAGS += -DCLP_DEBUG
#CXXFLAGS += -DPRESOLVE_DEBUG=1
endif
ifeq ($(OptLevel),-O2)
#     CXXFLAGS += -DNDEBUG
endif

meaning that NDEBUG is not used, even when optimization is set. Is this
correct?

Moreover, in ClpSimplex::createRim(), around lines 3362 in ClpSimplex.cpp, 

I have

#ifndef NDEBUG
       for (iRow=0;iRow<4;iRow++) {
                 int length =numberRows2+factorization_->maximumPivots();
                 if (iRow==3||objective_->type()>1)
                   length += numberColumns_;
                 assert(rowArray_[iRow]->capacity()==length);
         rowArray_[iRow]->checkClear();
       }

       for (iColumn=0;iColumn<2;iColumn++) {
                 int length =numberColumns_;
                 if (iColumn)
                   length=CoinMax(numberRows2,numberColumns_);
                 assert(columnArray_[iColumn]->capacity()==length);
         columnArray_[iColumn]->checkClear();
       }
#endif

The code sometimes stops in the calls to

rowArray_[iRow]->checkClear();
columnArray_[iColumn]->checkClear();

Are these calls debugging checks only or is it a serious failure?
If the latter is true, can I simply clear the vectors and continue?

Francois
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