[Bug default/26315] abidiff segfaults from 9a113ce but works in 1.7

[dodji at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26315

dodji at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2020-09-10
             Status|UNCONFIRMED                 |WAITING
     Ever confirmed|0                           |1

--- Comment #5 from dodji at redhat dot com ---
Thank you for reporting this issue, and sorry for the inconvenience.

Looking at the backtrace it looks like libabigail the segmentation fault is
happening on this line:

··if·(*l.get_underlying_type()·!=·*r.get_underlying_type())$  


basically, l and r are typdef types.  Normally, {l,r}.get_underlying_type() can
never be NULL, because typedef always have underlying types.

So I am not sure what is happening there.  It would be really helpful if I
could look at the binary itself to see what is happening, but I guess that is
not possible, is it?

Just for the record, the git hash I am looking at is this one:
fd8640dc09b99bee11745a4d5b176b2dee3400f4

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