[ET Trac] [Einstein Toolkit] #956: Allow skipping setting the RHS to zero in MoL

[Einstein Toolkit]

#956: Allow skipping setting the RHS to zero in MoL
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  Reporter:  eschnett               |       Owner:        
      Type:  enhancement            |      Status:  closed
  Priority:  minor                  |   Milestone:        
 Component:  EinsteinToolkit thorn  |     Version:        
Resolution:  fixed                  |    Keywords:        
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Comment (by rhaas):

 Thinking about this a bit more, what happens in the following situation:
 * Carpet poisons new memory incl. the RHS when it is first allocated
 * most thorns put nothing into the ghost zones when computing the RHS, so
 they stay poisoned
 * in the buffer zones, until the full RK step is done, the poison
 accumulates possibly creating an overflow and/or triggering a NaN check
 inside MoL_Add (if it was turned on)

 Is this what would happen?

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/956#comment:4>
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