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bpo-29587: Enable implicit exception chaining with gen.throw() (GH-19811)

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Before this commit, if an exception was active inside a generator
when calling gen.throw(), then that exception was lost (i.e. there
was no implicit exception chaining).  This commit fixes that.
This commit is contained in:
Chris Jerdonek 2020-04-30 12:18:05 -07:00 • committed by GitHub
parent c001c09e90
commit 2514a632fb
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3 changed files with 24 additions and 0 deletions
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6
Objects/genobject.c
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@ -512,6 +512,12 @@ throw_here:
}
PyErr_Restore(typ, val, tb);
if (gen->gi_exc_state.exc_type) {
Py_INCREF(gen->gi_exc_state.exc_type);
Py_XINCREF(gen->gi_exc_state.exc_value);
Py_XINCREF(gen->gi_exc_state.exc_traceback);
_PyErr_ChainExceptions(gen->gi_exc_state.exc_type, gen->gi_exc_state.exc_value, gen->gi_exc_state.exc_traceback);
}
return gen_send_ex(gen, Py_None, 1, 0);
failed_throw: