Issue #13188: When called without an explicit traceback argument,

generator.throw() now gets the traceback from the passed exception's
``__traceback__`` attribute.  Patch by Petri Lehtinen.
This commit is contained in:
Antoine Pitrou 2011-10-18 16:42:55 +02:00
commit cf28eacafe
3 changed files with 35 additions and 0 deletions

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@ -1673,6 +1673,32 @@ Traceback (most recent call last):
...
ValueError: 7
Plain "raise" inside a generator should preserve the traceback (#13188).
The traceback should have 3 levels:
- g.throw()
- f()
- 1/0
>>> def f():
... try:
... yield
... except:
... raise
>>> g = f()
>>> try:
... 1/0
... except ZeroDivisionError as v:
... try:
... g.throw(v)
... except Exception as w:
... tb = w.__traceback__
>>> levels = 0
>>> while tb:
... levels += 1
... tb = tb.tb_next
>>> levels
3
Now let's try closing a generator:
>>> def f():

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@ -10,6 +10,10 @@ What's New in Python 3.3 Alpha 1?
Core and Builtins
-----------------
- Issue #13188: When called without an explicit traceback argument,
generator.throw() now gets the traceback from the passed exception's
``__traceback__`` attribute. Patch by Petri Lehtinen.
- Issue #13146: Writing a pyc file is now atomic under POSIX.
- Issue #7833: Extension modules built using distutils on Windows will no

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@ -261,6 +261,11 @@ gen_throw(PyGenObject *gen, PyObject *args)
val = typ;
typ = PyExceptionInstance_Class(typ);
Py_INCREF(typ);
if (tb == NULL) {
/* Returns NULL if there's no traceback */
tb = PyException_GetTraceback(val);
}
}
}
else {