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Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
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Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Gaetan Nadon <memsize@videotron.ca>
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Signed-off-by: Jesse Adkins <jesserayadkins@gmail.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
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Correct a problem when deleting text portions that may lead to a crash
due to accessing released memory; in most cases it would crash in
AsciiSink.c:AsciiPreparePaint() when calling XtMalloc() with a negative
value.
The problem was due to not properly removing/updating XawTextEntity
objects. One case that can cause the problem to happen is with patch files
with syntax highlight, and sequentially selecting a deleting them. At one
point attempt to remove the "first" XawTextAnchor, and also incorrectly
update it's offset value to a negative value. The problem is not easy
to reproduce as it requires a file with a special pattern (in this case
the syntax highlight used for patch) and it would fail after removing
all "entities" of the second "anchor".
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X.Org Bugzilla #9649 <https://bugs.freedesktop.org/show_bug.cgi?id=9649>
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