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bug#34256: 27.0.50; Crash on draw_glyphs()


From: Kaushal Modi
Subject: bug#34256: 27.0.50; Crash on draw_glyphs()
Date: Wed, 30 Jan 2019 11:35:32 -0500

On Wed, Jan 30, 2019 at 11:16 AM Eli Zaretskii <address@hidden> wrote:

Do you strip Emacs when you install it?  If so, please don't, because
when you strip the debugging symbols, you lose the capability of
giving us any useful information about the crash.

Understood. I built that emacs with -O2 and without " --enable-checking='yes,glyphs' --enable-check-lisp-object-type" as it's my daily driver version.

 
If you can reproduce this problem, please post the recipe; otherwise I
don't see how this could be of any use.  Too bad.

I'll work on getting a recipe.

Why isn't there a -g3 in the compiler switches?  AFAIK, the default
configuration supplies it.

Yes, I did not add that switch; I do that in my debug builds.
 
  Did you specify CFLAGS at configure time?
If so, please add -g3 to the switches, and I suggest to use -Og,
not -O2, for better debuggability.

Will do.

Did you merge the harfbuzz branch with master, so there's no pdumper
in your build? 

Actually, sorry for that confusion. I realized that I had the --with-harfbuff switch since when I tried the harfbuff branch, but forgot to remove that from my build script.
 
If not, why do I see CANNOT_DUMP in the list of
features?

This was built using the latest master (i.e. with pdumper and no harfbuzz).

I'll try to get a recipe.

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