don't use f_locals for foreign async generators

[graingert]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.63%. Comparing base (9d6e134) to head (8fdaaf5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3112   +/-   ##
=======================================
  Coverage   99.62%   99.63%           
=======================================
  Files         122      122           
  Lines       18340    18380   +40     
  Branches     1222     1223    +1     
=======================================
+ Hits        18272    18312   +40     
  Misses         47       47           
  Partials       21       21           

Files with missing lines	Coverage Δ
src/trio/_core/_asyncgens.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_guest_mode.py	100.00% <100.00%> (ø)

[A5rocks]

Oh the pypy cache failures are back :(

I tried deleting the relevant caches from the GH actions cache page last time this happened but I guess they came back. That still works to fix it temporarily though. (Or they get fixed after a few hours for some reason)