[petsc-dev] Cannot reuse matrix of type (null)

[Eric Chamberland]

Hi,

something seems broken with master branch since last night.

With our nighlty tests, we now have many times this PETSC ERROR:

[0]PETSC ERROR: Cannot reuse matrix of type (null)
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html 
for trouble shooting.
[0]PETSC ERROR: Petsc Development GIT revision: v3.7.4-2508-ga46e98f 
GIT Date: 2016-12-14 17:44:47 -0600
[0]PETSC ERROR: 
/pmi/cmpbib/compilation_BIB_gcc_redhat_petsc-master_debug/COMPILE_AUTO/BIB/bin/Test.BIBProblemeGD.dev 
on a arch-linux2-c-debug named compile by Unknown Fri Dec 16 03:06:00 2016
[0]PETSC ERROR: Configure options --prefix=/opt/petsc-master_debug 
--with-mpi-compilers=1 --with-make-np=12 --with-shared-libraries=1 
--with-mpi-dir=/opt/openmpi-1.10.2 --with-debugging=yes 
--with-mkl_pardiso=1 --with-mkl_pardiso-dir=/opt/intel/composerxe/mkl 
--download-ml=yes --download-mumps=yes --download-superlu=yes 
--download-superlu_dist=yes --download-parmetis=yes 
--download-ptscotch=yes --download-metis=yes --download-suitesparse=yes 
--download-hypre=yes --with-scalapack=1 
--with-scalapack-include=/opt/intel/composerxe/mkl/include 
--with-scalapack-lib="-L/opt/intel/composerxe/mkl/lib/intel64 
-lmkl_scalapack_lp64 -lmkl_blacs_openmpi_lp64" 
--with-blas-lapack-dir=/opt/intel/composerxe/mkl/lib/intel64
[0]PETSC ERROR: #1 MatConvert_SeqAIJ_SeqDense() line 115 in 
/pmi/cmpbib/compilation_BIB_gcc_redhat_petsc-master_debug/COMPILE_AUTO/petsc-master-debug/src/mat/impls/dense/seq/dense.c
[0]PETSC ERROR: #2 MatConvert() line 4136 in 
/pmi/cmpbib/compilation_BIB_gcc_redhat_petsc-master_debug/COMPILE_AUTO/petsc-master-debug/src/mat/interface/matrix.c


With all other PETSc versions we use, with the same tests, we do not 
have this problem.

Here are the configure/build logs:

http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2016.12.16.02h00m01s_configure.log
http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2016.12.16.02h00m01s_make.log
http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2016.12.16.02h00m01s_RDict.log
http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2016.12.16.02h00m01s_CMakeLists.txt

Is it a normal change or is it a bug?

I can provide more context to help dig into this.

Thanks,

Eric