st_nested_scopes was uninitialized trash. Jeremy should fix in a better
way; see code comments.
diff --git a/Python/compile.c b/Python/compile.c
index 66cd00a..5e150c9 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -4595,6 +4595,12 @@
if (st == NULL)
return NULL;
st->st_pass = 1;
+
+ /* XXX Tim: Jeremy deleted the next line and everything went to hell.
+ XXX It should probably get fixed by getting rid of st_nested_scopes
+ XXX entirely. */
+ st->st_nested_scopes = 1;
+
st->st_filename = NULL;
if ((st->st_stack = PyList_New(0)) == NULL)
goto fail;