[gstreamer-bugs] [Bug 566903] New: gst.Pad.iterate_internal_links may raise critical warning or segfault
GStreamer (bugzilla.gnome.org)
bugzilla-daemon at bugzilla.gnome.org
Wed Jan 7 06:45:26 PST 2009
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GStreamer | gst-python | Ver: 0.10.13
Summary: gst.Pad.iterate_internal_links may raise critical
warning or segfault
Product: GStreamer
Version: 0.10.13
Platform: Other
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: gst-python
AssignedTo: gstreamer-bugs at lists.sourceforge.net
ReportedBy: manauw at skynet.be
QAContact: gstreamer-bugs at lists.sourceforge.net
GNOME version: Unspecified
GNOME milestone: Unspecified
Core gst_pad_iterate_internal_links() might return NULL rather than an actual
iterator, e.g. if the pad has no parent or not an Element as parent (e.g. in
ghostpad/proxypad setting), which pygst_iterator_new and friends do not seem to
appreciate.
An interactive session can reproduce as exampled below
(if debug GST_PADS >= 4 segfault occurs).
As to a fix; maybe core should not return NULL, but an empty list/iterator, or
pygst should come up with an "empty" one, or throw exception, or ... ?
Python 2.5.2 (r252:60911, Apr 21 2008, 11:17:30)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gst
>>> p = gst.Pad('p', gst.PAD_SRC)
>>> it = p.iterate_internal_links()
>>> it.next()
(.:20394): GStreamer-CRITICAL **: gst_iterator_next: assertion `it != NULL'
failed
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: Error
>>> quit()
(.:20394): GStreamer-CRITICAL **: gst_iterator_free: assertion `it != NULL'
failed
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