On 9 October 2016 at 10:57, Eli Zaretskii wrote: > > From: Reuben Thomas > > Date: Sun, 9 Oct 2016 08:45:08 +0100 > > Cc: 24640@debbugs.gnu.org > > > > The only efficient way to speed up debugging (or rather to make sure > > it succeeds at all) is for you to come up with a reproducible recipe > > and post here all the files needed for reproducing the crashes. > > > > ​That would seem to require me to bisect my .desktop and potentially > post dozens of personal files, so doesn't > > seem feasible.​ > > If you just start a fresh session, save its desktop, then restart it, > while using the lazy-load feature, does it start normally? Maybe all > that's needed is to do this, with no personal files involved. > ​It starts normally, unfortunately. ​​ > > And the first step is > > to stop using an optimized build, because it makes debugging much > > harder if not impossible. > > > > I'll see if, having rebuilt from source without optimisation, the bug > still fires.​ > ​I rebuilt with the options suggested in etc/DEBUG, and couldn't get it to crash. ​ I then tried building with -Og instead of -O0, as suggested in etc/DEBUG. Still no crash. (I ran each binary under gdb 3 times, as when it crashes it crashes more than once every 3 times I run it.) I tried building with -O2: it crashes again. Now that it is built with the same options as etc/DEBUG, except for -O2, is that more useful? ​I tried running Emacs with valgrind, but that just quickly bails out with "memory exhausted". > If you are willing to try the debugging yourself, there's some advice > > in etc/DEBUG (search for "Debugging problems which happen in GC"). > > > > ​I'll have a look.​ > > Thanks. > ​Sorry: having had a look, the reconstruction of Lisp data structures looks like more than I have time for at present. > > Do I understand correctly that this worked for you with Emacs 24.5? > > > > ​Yes, the identical setup loads fine in 24.5. I've never seen this sort > of crash before.​ > > Does Emacs crash when restoring a desktop file written by Emacs 24.5, > or only when it restores files written by Emacs 25? > ​Both. -- http://rrt.sc3d.org