Circular referencing macro segfault
Rach Holmes
Rach.Holmes at GMX.net
Wed Oct 9 15:06:06 UTC 2002
Hi,
There is a macro circular referencing bug in mcedit from version 4.5.55, 4.6.0pre1 and the current snapshot I am using(mc-2002-10-08-21 from ibiblio) and possibly other versions. I have seen no data corruption occur, and the "fix" so far has been to think a little more carefully while assigning macro keys :)
An example to replicate the segfault:
C-r C-a C-r-a # Setup a macro on 'a' calling the macro (defined or not) on 'a'
to set everything up, then simply:
C-a-a
to see the segfault.
I have tested it with the versions noted above, and also I have tested on different machines with different configurations. A back trace has been left out because this is not an intermittent error.
It will still occur if the loop is bigger, ie. macro a->b->c->a (this was the situation when it showed up). Sometimes it requires reset(1) afterwards, other times it doesn't.
Rach
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