Commits on Mar 21, 2023

1. syntax: tweak the "no stack overflow" test …

   This test works by spinning up a thread with an atypically small stack
   size, parsing a regex into an Ast and then dropping it. We use a small
   stack size such that *if the Ast didn't have a custom Drop impl*, then
   its default recursive Drop impl would overflow the stack. (If we don't
   use a smaller stack size, then the default on some platforms is usually
   quite large and might require a much larger Ast to provoke a failure.)
   
   It turns out that the stack size we were using was quite tiny, and too
   tiny for some platforms such as FreeBSD. We therefore increase it a
   little bit, but not too much.
   
   We do the same for the corresponding test for the custom Drop impl for
   Hir.
   
   Fixes #967

   

   BurntSushi committed Mar 21, 2023
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