[petsc-users] Simple KSP with known solution gives infinite solution

[zakaryah]

Additional weird behavior:

If I run with


-ksp_monitor -ksp_monitor_true_residual -ksp_converged_reason -pc_type
jacobi


I get:


  0 KSP Residual norm 1.389113910577e-03



  0 KSP preconditioned resid norm 1.389113910577e-03 true resid norm
    -nan ||r(i)||/||b||           -nan


  1 KSP Residual norm 2.214853823259e-19



  1 KSP preconditioned resid norm 2.214853823259e-19 true resid norm
    -nan ||r(i)||/||b||           -nan


Linear solve converged due to CONVERGED_RTOL iterations 1
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