[Trilinos-Users] glibc detected in IFPack ILU compute()

[james williams]

Hi All,

I'm using the Ifpack factory class to build an ILU preconditioner for a 
serial code.  After creating and initializing the preconditioner from my 
FillCompleted EpetraCrs matrix, I call compute() and the program crashes 
with:

*** glibc detected *** ./zoupa: free(): invalid next size (normal): 
0x00000000069df2e0 ***
*** glibc detected *** ./zoupa: malloc(): memory corruption: 
0x00000000069eeb10 ***

When I run the code with valgrind, I get:

==9743== Invalid write of size 4
==9743==    at 0xBBE0F0: Ifpack_ILU::Compute() (in 
/storage/jww/SIM_VERSIONS/IMEX_ML_SIM/zoupa)
==9743==    by 0xB39F0C: Ifpack_AdditiveSchwarz<Ifpack_ILU>::Compute() 
(in /storage/jww/SIM_VERSIONS/IMEX_ML_SIM/zoupa)
==9743==    by 0x4B09B2: compif_ (pass_A.cpp:62)
==9743==    by 0x4C593D: stepper_ (stepper.f90:268)
==9743==    by 0x486356: MAIN__ (ice.f90:220)
==9743==    by 0x4DD639: main (in 
/storage/jww/SIM_VERSIONS/IMEX_ML_SIM/zoupa)
==9743==  Address 0x744285c is 0 bytes after a block of size 63,516 alloc'd

This looks like writing off the end of the of the memory block, any 
ideas of why this could be happening?

Additional notes:

1) The matrix is sparse, square, non-symmetric.

2) Using an ML preconditioner with the same matrix, and an analogous 
build process runs with no problems.

Any insight into what could be going wrong is much appreciated,
James