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gen_iternext(): Don't assume that the current thread state's frame is

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not NULL.  I don't think it can be NULL from Python code, but if using
generators via the C API I expect a NULL frame is possible.
This commit is contained in:
Tim Peters 2001-06-23 05:47:56 +00:00
parent 2829f1cf99
commit 5eb4b87ae6
1 changed files with 2 additions and 2 deletions
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4
Python/ceval.c
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@ -152,7 +152,7 @@ gen_iternext(genobject *gen)
/* Generators always return to their most recent caller, not
* necessarily their creator. */
Py_INCREF(tstate->frame);
Py_XINCREF(tstate->frame);
assert(f->f_back == NULL);
f->f_back = tstate->frame;
@ -163,7 +163,7 @@ gen_iternext(genobject *gen)
/* Don't keep the reference to f_back any longer than necessary. It
* may keep a chain of frames alive or it could create a reference
* cycle. */
Py_DECREF(f->f_back);
Py_XDECREF(f->f_back);
f->f_back = NULL;
return result;