On Wed, 17 Nov 2010, Roy Stogner wrote:

> I'm actually not sure how this is causing your bug, though - you're
> just using the point_locator in the flagging stage, right?  Where the
> elements haven't actually been created or deleted yet?

Worse still: it's a Heisenbug.  In dbg mode, we really do now use the
point_locator after the new element creation/destruction happens, to
assert MeshRefinement::test_level_one()...

That's a debug-only sort of function, so we don't have to worry about
efficiency losses from clearing the point locator at the start of it,
but then we'd be creating the possibility of new heisenbugs later.
---
Roy

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