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Issue #19235: Add new RecursionError exception. Patch by Georg Brandl.

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This commit is contained in:
Yury Selivanov 2015-07-03 01:04:23 -04:00
parent 27be130ec7
commit f488fb422a
31 changed files with 101 additions and 69 deletions
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6
Include/ceval.h
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@ -48,16 +48,16 @@ PyAPI_FUNC(int) Py_MakePendingCalls(void);
In Python 3.0, this protection has two levels:
* normal anti-recursion protection is triggered when the recursion level
exceeds the current recursion limit. It raises a RuntimeError, and sets
exceeds the current recursion limit. It raises a RecursionError, and sets
the "overflowed" flag in the thread state structure. This flag
temporarily *disables* the normal protection; this allows cleanup code
to potentially outgrow the recursion limit while processing the
RuntimeError.
RecursionError.
* "last chance" anti-recursion protection is triggered when the recursion
level exceeds "current recursion limit + 50". By construction, this
protection can only be triggered when the "overflowed" flag is set. It
means the cleanup code has itself gone into an infinite loop, or the
RuntimeError has been mistakingly ignored. When this protection is
RecursionError has been mistakingly ignored. When this protection is
triggered, the interpreter aborts with a Fatal Error.
In addition, the "overflowed" flag is automatically reset when the

1
Include/pyerrors.h
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@ -167,6 +167,7 @@ PyAPI_DATA(PyObject *) PyExc_MemoryError;
PyAPI_DATA(PyObject *) PyExc_NameError;
PyAPI_DATA(PyObject *) PyExc_OverflowError;
PyAPI_DATA(PyObject *) PyExc_RuntimeError;
PyAPI_DATA(PyObject *) PyExc_RecursionError;
PyAPI_DATA(PyObject *) PyExc_NotImplementedError;
PyAPI_DATA(PyObject *) PyExc_SyntaxError;
PyAPI_DATA(PyObject *) PyExc_IndentationError;