prepare for handling PEP 649

Lib/symtable.py

@@ -6,7 +6,7 @@
  DEF_GLOBAL, DEF_NONLOCAL, DEF_LOCAL,
  DEF_PARAM, DEF_TYPE_PARAM, DEF_IMPORT, DEF_BOUND, DEF_ANNOT,
  SCOPE_OFF, SCOPE_MASK,
- FREE, LOCAL, GLOBAL_IMPLICIT, GLOBAL_EXPLICIT, CELL
+ FREE, LOCAL, GLOBAL_IMPLICIT, GLOBAL_EXPLICIT, CELL,
 )
 
 import weakref
@@ -231,13 +231,14 @@ def is_local_symbol(ident):
  if is_local_symbol(st.name):
  if st.type == _symtable.TYPE_TYPE_PARAM:
  # Current 'st' is an annotation scope with one or
- # more children (we expect only one, but we might
- # have more in the future). In particular, we need
- # to find the corresponding inner function, class or
- # type alias.
- st = next((c for c in st.children if c.name == st.name), None)
- # if 'st' is None, then the annotation scopes are broken
- assert st is not None, 'annotation scopes are broken'
+ # more children and we expect at most one to be of
+ # type TYPE_FUNCTION and with the same identifier.
+ for st_c in st.children:
+ if st_c.name == st.name and st_c.type == _symtable.TYPE_FUNCTION:
+ d[st.name] = 1
+ break
+ else:
+ continue
 
  # only select function-like symbols
  if st.type == _symtable.TYPE_FUNCTION: