https://bugs.freedesktop.org/show_bug.cgi?id=67128

--- Comment #13 from Terrence Enger <[email protected]> ---
Created attachment 84075
  --> https://bugs.freedesktop.org/attachment.cgi?id=84075&action=edit
backtrace from later segfault, executing on a 64-bit system

With master commit ecb842e, pulled around 2013-08-13 22:30 UTC, built
with --enable-dbgutil, the results are different, but further actions
lead anyway to a segmentation fault.  So, picking up from step (9) of
comment 10, my revised report is ...

( 9) Click "Sort Ascending".  Program resorts the rows so that all
     cells visible in column B have 1.  Note that the header row has
     been sorted out-of-sight.

(10) Type ctrl-Z.  Row 1, in particular, is once again the header row
     with down-arrow buttons.

(11) Click the down-arrow button in cell B1.  Program present the
     pop-up.

(12) Click "Sort Descending".  Segfault.

The backtrace again shows function

    __gnu_debug :: _Safe_iterator_base :: _M_attach_single
        ( __gnu_debug :: _Safe_sequence_base *
        , bool
        )

So, I conclude that
    (a) this is, in some ill-defined sense, the same crash; and
    (b) a non-dbgutil build is unlikely to fail the same way.

Still, if the non-dbgutil build is not somehow unclean--perhaps
relying on undocumented behaviour of the STL, or something--it would
suggest a problem in STL.  Unless our code really is different with
--enable-dbgutil; I saw a commit fixing one of those bugs in the last
few days.

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