r17864 - gnucash/branches/2.2/src/register/ledger-core - [17853] Bug #435642: Fix crash when editing results of a find

[Christian Stimming]

Author: cstim
Date: 2009-01-31 05:46:19 -0500 (Sat, 31 Jan 2009)
New Revision: 17864
Trac: http://svn.gnucash.org/trac/changeset/17864

Modified:
   gnucash/branches/2.2/src/register/ledger-core/split-register-util.c
Log:
[17853] Bug #435642: Fix crash when editing results of a find

I finally got around to looking into this some more.  I think the problem is a
result of an interaction between gnc_split_register_redraw and
gnc_split_register_find_split when called from gnc_split_register_move_cursor
in split-register-control.c.  As the comment says, "redrawing the register can
muck everything up".  In particular calling gnc_split_register_redraw may
change the "transaction split" for some or all of the transactions if the
register is a "ledger" style register such as the one for find results.  This
causes the subsequent call to gnc_split_register_find_split to find the wrong
register row if the cursor class being found is CURSOR_CLASS_TRANS.  Whether
this causes a crash seems to depend on circumstances I haven't quite figured
out, but I have one test file that crashes 100% of the time in r17804.

This patch changes the way gnc_split_register_find_split works when asked to
find the transaction split for a transaction.  It assumes that any transaction
can only have one such split and returns as soon as it finds a row containing
it.  If you think this is wrong, let me know and I'll try something else.

Patch by Mike Alexander.