This should have been sent to Toby. I don't really understand the issue here. Its triggered by --with-debugging=0. I'm not sure why these compilers are pointing to petscsys.h. I get slightly different message on my laptop. mpicc -c -fPIC -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -fvisibility=hidden -g -O -I/home/balay/petsc/include -I/home/balay/petsc/arch-linux2-c-opt/include -I/home/balay/soft/mpich-3.1.4/include -MMD -MP /home/balay/petsc/src/dm/impls/plex/plextree.c -o arch-linux2-c-opt/obj/src/dm/impls/plex/plextree.o /home/balay/petsc/src/dm/impls/plex/plextree.c: In function οΏ½DMPlexComputeInjectorTreeοΏ½: /home/balay/petsc/src/dm/impls/plex/plextree.c:3484:11: warning: οΏ½childrenMatsοΏ½ may be used uninitialized in this function [-Wmaybe-uninitialized] ierr = PetscFree(refPointFieldMats);CHKERRQ(ierr); ^ /home/balay/petsc/src/dm/impls/plex/plextree.c:3507:18: note: οΏ½childrenMatsοΏ½ was declared here PetscScalar ***childrenMats; ^ Satish On Fri, 8 Apr 2016, PETSc checkBuilds wrote:

Dear PETSc developer,

This email contains listings of contributions attributed to you by `git blame` that caused compiler errors or warnings in PETSc automated testing. Follow the links to see the full log files. Please attempt to fix the issues promptly or let us know at [email protected] if you are unable to resolve the issues.

Thanks, The PETSc development team

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warnings attributed to commit https://bitbucket.org/petsc/petsc/commits/49d7da5 PetscMalloc: allow ptr=malloc(0) and free(ptr)

include/petscsys.h:1157 [http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/04/08/build_next_a...] /usr/home/balay/petsc.clone-2/include/petscsys.h:1157:88: warning: 'childrenMats' may be used uninitialized in this function [-Wmaybe-uninitialized] [http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/04/08/build_next_a...] /sandbox/petsc/petsc.clone-3/include/petscsys.h:1157:88: warning: 'childrenMats' may be used uninitialized in this function [-Wmaybe-uninitialized] [http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/04/08/build_next_a...] /usr/home/balay/petsc.clone/include/petscsys.h:1157:39: warning: 'childrenMats' may be used uninitialized in this function [-Wmaybe-uninitialized] [http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/04/08/build_next_a...] /sandbox/petsc/petsc.clone-4/include/petscsys.h:1157:25: warning: 'childrenMats' may be used uninitialized in this function [-Wmaybe-uninitialized] [http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/04/08/build_next_a...] /sandbox/petsc/petsc.clone/include/petscsys.h:1157:25: warning: 'childrenMats' may be used uninitialized in this function [-Wmaybe-uninitialized]

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