Mat tests ex134: fix compiler warning

checkBadSource: fix ierr=

PetscStack : check for correct push/pop

Enforce checkstack for CI jobs
Fixes from testsuite

MatHtool: new option -mat_htool_clustering

Removed CHKERRQ() that come immediately after SETERRQ(), add test to checkbadSource() to find such constructs

Commit-type: bug-fix, error-checking
\spend 10m
Reported-by: Lisandro Dalcin <dalcinl@gm

Removed CHKERRQ() that come immediately after SETERRQ(), add test to checkbadSource() to find such constructs

Commit-type: bug-fix, error-checking
\spend 10m
Reported-by: Lisandro Dalcin <dalcinl@gmail.com>

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Update badsource rules

- Zero or more spaces are not allowed for more returning types
- zero spaces not allowed for for|if|while

src/mat/tests/ex84: compare serial and parallel HDF5 load in test;

* add tests 2-complex,2-real
* print matrix sizes

add src/mat/tests/ex84.c

doc: fix checksource errros from 0e3d61c972ee8b0cd7b6ee2ab64f8543b0740577

Remove use of * at beginning of comment line and /** and **/

Remove all double blank lines from source

Commit-type: petsc-style
/2h

Merge remote-tracking branch 'origin/release'

Significantly reduce runtime of mat/tests/ex238 test

Commit-type: testing-fix
/spend 5m
Reported-by: Stefano Zampini <stefano.zampini@gmail.com>
Reported-by: Matthew Knepley <knepley@gmail.com>

Remove use of PETSC_SKIP_CXX_COMPLEX_FIX in petsc source code

Add some Kokkos tests

Test cuda QR

Add MATCENTERING special matrix type.

Add MATHTOOL

add examples on MatProductSetAlgorithm() and MatProductView()

Merge remote-tracking branch 'origin/release'

Fix code that did not pass appropriate PETSc error flags to SETERRQ()

Add checkbadSource check for use of SETERRQ() without an appropriate error flag

Commit-type: error-checking, bug-fix, testing-f

Fix code that did not pass appropriate PETSc error flags to SETERRQ()

Add checkbadSource check for use of SETERRQ() without an appropriate error flag

Commit-type: error-checking, bug-fix, testing-fix, style-fix
/spend 2.5h

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