GeezerVison

I've covered several missing conditions in TARGET(LOAD_GLOBAL):

• The one where custom globals() dict subtype raises non KeyError:

  cpython/Python/ceval.c

  Lines 2445 to 2447 in 53a54b7

  	if (!_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
  	goto error;
  	}

• Similar case where __builtins__ dict subtype raises non KeyError:

  cpython/Python/ceval.c

  Line 2458 in 53a54b7

  goto error;

• Regular NameError in a custom __builtins__ dict subtype:

  cpython/Python/ceval.c

  Lines 2453 to 2457 in 53a54b7

  	if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
  	format_exc_check_arg(
  	tstate, PyExc_NameError,
  	NAME_ERROR_MSG, name);
  	}

• Issue: Metabug: Improving C-level coverage #94808