[issue7819] sys.call_tracing(): check arguments type

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

Before someone is asking, i wrote a new version of my patch using an unit test. The patch also test sys.call_tracing() with valid arguments.

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Added file: http://bugs.python.org/file16069/sys_call_tracing-2.patch

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