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<p>Hi Shu,</p>
<p>I can confirm that I’m getting the same error on my end as well. I checked the eptorsion2f test and I don’t see anything immediately wrong with it. I think something may be bugged about the Fortran interface for TaoSetMonitor, or alternatively the internal
fortran function pointer mapping for monitors, monitor contexts and monitor destroy functions. I will take a closer look at this over the weekend and we will get a fix for this tested and merged to master as soon as possible.</p>
<p>Thanks!</p>
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<p><strong>Alp Dener</strong><br>
Argonne National Laboratory<br>
<a href="http://mcs.anl.gov/person/alp-dener">mcs.anl.gov/person/alp-dener</a></p>
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<p class="airmail_on">On July 20, 2018 at 8:19:12 PM, Shu Wang (<a href="mailto:shuwang12@unm.edu">shuwang12@unm.edu</a>) wrote:</p>
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<p style="margin-top:0;margin-bottom:0">Hi all,</p>
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<p style="margin-top:0;margin-bottom:0">I ran into a error with user-defined tao's monitor with TaoSetMonitor in Fortran.<br>
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<p style="margin-top:0;margin-bottom:0">When I ran the example eptorsion2f in <span>
$PETSC_DIR/src/tao/unconstrained/examples/tutorials/ with '-testmonitor'</span>, there split the following error,<br>
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<div>[0]PETSC ERROR: ------------------------------------------------------------------------<br>
[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range<br>
[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger<br>
[0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind<br>
[0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors<br>
[0]PETSC ERROR: likely location of problem given in stack below<br>
[0]PETSC ERROR: --------------------- Stack Frames ------------------------------------<br>
[0]PETSC ERROR: Note: The EXACT line numbers in the stack are not available,<br>
[0]PETSC ERROR: INSTEAD the line number of the start of the function<br>
[0]PETSC ERROR: is given.<br>
[0]PETSC ERROR: [0] TaoCancelMonitors line 1444 /home/ws/Softwares/petsc-3.9.3/src/tao/interface/taosolver.c<br>
[0]PETSC ERROR: [0] TaoDestroy line 276 /home/ws/Softwares/petsc-3.9.3/src/tao/interface/taosolver.c<br>
[0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------</div>
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<div>My configuration for petsc-3.9.3 is as follows:<br>
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<div>--with-metis-dir=/usr/local/ --with-parmetis-dir=/usr/local/ --download-hdf5 -with-debugging=1 --with-mpi-dir=/usr/local/openmpi --download-fblaslapack --with-fortran-datatypes.</div>
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<div>and the compiler is gcc-4.7.4 with openmpi/2.0.1.<br>
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<div>Is there any bug associate with tao's destroy routine with user-defined monitor is invoked?<br>
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<div>Any comments are welcomed.<br>
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Yours sincerely,
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<div>Shu Wang</div>
<div>Electrical and Computer Engineering Department of University of New Mexico</div>
<div>Albuquerque, NM</div>
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