[ET Trac] [Einstein Toolkit] #2030: Multi-block boundaries leave uninitialized boundary points

[Einstein Toolkit]

#2030: Multi-block boundaries leave uninitialized boundary points
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 Reporter:  eschnett               |       Owner:                     
     Type:  defect                 |      Status:  new                
 Priority:  major                  |   Milestone:                     
Component:  EinsteinToolkit thorn  |     Version:  development version
 Keywords:                         |  
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 Applying multi-block boundaries can leave uninitialized boundary points.
 This happens when multi-block boundaries are used in combination with
 another boundary condition that looks at the interior of the grid, such as
 e.g. a symmetry condition or radiative / extrapolating boundaries.

 There is another bug currently in McLachlan that applies its "scalar"
 boundary conditions to too few grid points (it uses "BoundaryNoSync"
 instead of "Boundary"), which means there are uninitialized boundary
 points for {{{initial_boundary_condition = "scalar"}}} as well in multi-
 block systems.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/2030>
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