Make identifiers str (not str8) objects throughout.

This affects the parser, various object implementations,
and all places that put identifiers into C string literals.

In testing, a number of crashes occurred as code would
fail when the recursion limit was reached (such as the
Unicode interning dictionary having key/value pairs where
key is not value). To solve these, I added an overflowed
flag, which allows for 50 more recursions after the
limit was reached and the exception was raised, and
a recursion_critical flag, which indicates that recursion
absolutely must be allowed, i.e. that a certain call
must not cause a stack overflow exception.

There are still some places where both str and str8 are
accepted as identifiers; these should eventually be
removed.

1 files changed, 2 insertions, 0 deletions

diff --git a/Lib/test/test_frozen.py b/Lib/test/test_frozen.py
index 678b9a8..f1299f0 100644
--- a/Lib/test/test_frozen.py
+++ b/Lib/test/test_frozen.py
@@ -10,6 +10,8 @@
 from test.test_support import TestFailed
 import sys, os
 
+raise TestFailed, "test currently causes assertion in debug mode"
+
 try:
     import __hello__
 except ImportError as x: