LTA failure when exceeding limit of open files

[coke]

with a smallish ulimit (256), I was able to trigger this error:

✗ rak RAKUDO_POD_DECL_BLOCK_USER_FORMAT $(git ls-files)
doc/Language/pod.rakudoc
208:by defining a special environment variable: B<C<RAKUDO_POD_DECL_BLOCK_USER_FORMAT>>.
Caught 1 unique exception (out of 1) in hypered code:
--------------------------------------------------------------------------------
Failed to open file /Volumes/doc/doc/Type/Range.rakudoc: Too many open files
  in block  at /Users/coke/.rakubrew/versions/moar-2024.08/install/share/perl6/site/precomp/A034745E79DB8A348A801CECE20ECF590954E4BD/E3/E399776C8F1A3226E3347E20A6BDC43053862F3F line 1118
  in block  at /Users/coke/.rakubrew/versions/moar-2024.08/install/share/perl6/site/sources/E399776C8F1A3226E3347E20A6BDC43053862F3F (rak) line 1453
  in method run at /Users/coke/.rakubrew/versions/moar-2024.08/install/share/perl6/site/sources/140A8F9931ADE3D89A19D7E16699DF4A691FB614 (ParaSeq) line 193
  in block  at /Users/coke/.rakubrew/versions/moar-2024.08/install/share/perl6/site/sources/140A8F9931ADE3D89A19D7E16699DF4A691FB614 (ParaSeq) line 1636
  in block  at /Users/coke/.rakubrew/versions/moar-2024.08/install/share/perl6/site/sources/140A8F9931ADE3D89A19D7E16699DF4A691FB614 (ParaSeq) line 789
--------------------------------------------------------------------------------

Upping the ulimit in my session, I get only the expected result.

While this isn't App::Rak's fault, we might be able to either give a more awesome error, or catch the open files error somehow and queue the work while we close files we've already opened.