[petsc-users] segv in VecSum when using nested vec

[Klaij, Christiaan]

>> >> In a larger code I'm getting a segmentation fault when setting a null
>> space
>> >> with KSPSetNullSpace. After some trying I can reproduce the problem with
>> >> the small code below. It happens when calling VecSum on a nested vec.
>> >
>> >Runs for me:
>> >
>> >and it was valgrind clean. Are you running on multiple processes?
>> >
>> >   Matt
>>
>> Strange, I get the same error both with single and multiple processes...
>>
>
>Could you get a stack trace with gdb? Also, I ran on petsc-dev.

Breakpoint 1, vecsumsegv::vecsumsegv (this=0x7fffffffd310, m=3, n=4)
    at vecsumsegv.cc:28
28        ierr = VecSum(x,&val);
(gdb) next

Program received signal SIGSEGV, Segmentation fault.
0x00000000004fda7c in VecSum (v=0xbad750, sum=0x7fffffffd2c8)
    at /home/CKlaij/ReFRESCO/Libraries/build/petsc-3.2-p5/src/vec/vec/utils/vinv.c:1307
1307        lsum += x[i];
(gdb) backtrace
#0  0x00000000004fda7c in VecSum (v=0xbad750, sum=0x7fffffffd2c8)
    at /home/CKlaij/ReFRESCO/Libraries/build/petsc-3.2-p5/src/vec/vec/utils/vinv.c:1307
#1  0x000000000041f93e in vecsumsegv::vecsumsegv (this=0x7fffffffd310, m=3,
    n=4) at vecsumsegv.cc:28
#2  0x00000000004202fd in main (argc=1, argv=0x7fffffffd468)
    at vecsumsegv.cc:78
(gdb) bt full
#0  0x00000000004fda7c in VecSum (v=0xbad750, sum=0x7fffffffd2c8)
    at /home/CKlaij/ReFRESCO/Libraries/build/petsc-3.2-p5/src/vec/vec/utils/vinv.c:1307
        ierr = 0
        i = 0
        n = 36
        x = 0x2
        lsum = 0
#1  0x000000000041f93e in vecsumsegv::vecsumsegv (this=0x7fffffffd310, m=3,
    n=4) at vecsumsegv.cc:28
        val = 0
#2  0x00000000004202fd in main (argc=1, argv=0x7fffffffd468)
    at vecsumsegv.cc:78
        ierr = 0
        val = 6.3659873728958169e-314
        tryme = {ierr = 0, nx = 3, ny = 4, x = 0xbad750, subx = {0xb954e0,
            0xb9b640}, isg = {0xba4ac0, 0xba9140}}



dr. ir. Christiaan Klaij
CFD Researcher
Research & Development
E mailto:C.Klaij at marin.nl
T +31 317 49 33 44

MARIN
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