Segfault when using several independent spm matrices on different MPI processes and replicated = 0

In composyx we need to solve independent linear systems on each MPI process. To do that we tried to initialize spm as follows :

_spm = (spmatrix_t*)malloc(sizeof(spmatrix_t));
spmInitDist(_spm, MPI_COMM_SELF);
_spm->replicated = 0;

but we got the following segfault in spm :

Thread 1 "composyx_simple" received signal SIGSEGV, Segmentation fault.
0x00007ffff7e4e6bf in d_spmMergeDuplicate (spm=<optimized out>) at /home/florent/git/solverstack/pastix/build/spm/src/d_spm_mergeduplicate.c:76
76              jg   = spm->replicated ? jl : *loc2glob - baseval;
(gdb) bt
#0  0x00007ffff7e4e6bf in d_spmMergeDuplicate (spm=<optimized out>) at /home/florent/git/solverstack/pastix/build/spm/src/d_spm_mergeduplicate.c:76
#1  0x00007ffff7e54825 in spmMergeDuplicate (spm=spm@entry=0x7fffffffb3a0) at /home/florent/git/solverstack/pastix/spm/src/spm.c:812
#2  0x00007ffff7e54b82 in spmCheckAndCorrect (spm_in=0x555555841810, spm_out=0x7fffffffb4f0) at /home/florent/git/solverstack/pastix/spm/src/spm.c:906
#3  0x00005555555b348f in composyx::Pastix<composyx::SparseMatrixCOO<double, int>, composyx::DenseMatrix<double, 1> >::set_matrix (this=0x55555584a908, A=...)
    at /home/florent/git/composyx/composyx-private/include/composyx/solver/Pastix.hpp:292
#4  0x00005555555acf7f in composyx::Pastix<composyx::SparseMatrixCOO<double, int>, composyx::DenseMatrix<double, 1> >::setup (this=0x55555584a908, A=...)
    at /home/florent/git/composyx/composyx-private/include/composyx/solver/Pastix.hpp:373

added Errors label

And applying this patch

diff --git a/examples/example_lap1.c b/examples/example_lap1.c
index 3ce2ca2..72d03bb 100644
--- a/examples/example_lap1.c
+++ b/examples/example_lap1.c
@@ -113,7 +113,7 @@ spm_example_create_laplacian( spmatrix_t *spm )
     /*
      * Initialize all non computed fields.
      */
-    spmInit( spm );
+    spmInitDist( spm, MPI_COMM_SELF );
 
     /*
      * Set the fields according to what we want to generate.
@@ -128,7 +128,7 @@ spm_example_create_laplacian( spmatrix_t *spm )
     spm->dof     = 1;
 
     /* The full matrix is replicated on all nodes */
-    spm->replicated = 1;
+    spm->replicated = 0;
 
     /*
      * Update the computed fields.

to examples/example_lap1.c in spm leads to a segfault whose trace is

mpiexec -n 2 xterm -hold -e gdb -ex run --args ./build/examples/example_lap1

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#1  __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#3  0x00007ffff024527e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0x00007ffff02288ff in __GI_abort () at ./stdlib/abort.c:79
#5  0x00007ffff022881b in __assert_fail_base (fmt=0x7ffff03d01e8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
    assertion=assertion@entry=0x5555555a382f "*g2l != (- spm->clustnbr - 1)", file=file@entry=0x5555555a3298 "/home/florent/git/fpruvost/spm/src/spm.c",
    line=line@entry=1979, function=function@entry=0x5555555a3ac0 <__PRETTY_FUNCTION__.3> "spm_get_glob2loc") at ./assert/assert.c:96
#6  0x00007ffff023b517 in __assert_fail (assertion=0x5555555a382f "*g2l != (- spm->clustnbr - 1)", file=0x5555555a3298 "/home/florent/git/fpruvost/spm/src/spm.c",
    line=1979, function=0x5555555a3ac0 <__PRETTY_FUNCTION__.3> "spm_get_glob2loc") at ./assert/assert.c:105
#7  0x000055555555a793 in spm_get_glob2loc (spm=0x7fffffffc480) at /home/florent/git/fpruvost/spm/src/spm.c:1979
#8  0x000055555555a826 in spm_getandset_glob2loc (spm=0x7fffffffc480) at /home/florent/git/fpruvost/spm/src/spm.c:2022
#9  0x0000555555592c98 in d_spmSort (spm=0x7fffffffc480) at /home/florent/git/fpruvost/spm/build/src/d_spm_sort.c:310
#10 0x000055555556c556 in d_spmConvertIJV2CSC (spm=0x7fffffffc480) at /home/florent/git/fpruvost/spm/build/src/d_spm_convert_to_csc.c:355
#11 0x0000555555558155 in spmConvert (ofmttype=0, spm=0x7fffffffc480) at /home/florent/git/fpruvost/spm/src/spm.c:424
#12 0x0000555555557170 in main (argc=1, argv=0x7fffffffc668) at /home/florent/git/fpruvost/spm/examples/example_lap1.c:184