Re: SIGBUS in Vim 7.4

On Wednesday, May 11, 2016 at 12:17:03 PM UTC-7, Dominique Pelle wrote:
> Frew Schmidt <frioux@gmail.com> wrote:
>
> > On Wednesday, May 11, 2016 at 2:18:31 AM UTC-7, Dominique Pelle wrote:
> >> [ ... ]
> >> Thanks. I should add: asan writes errors (if any) on stderr by default,
> >> and since vim puts the terminal in cooked mode, asan error can be
> >> garbled. So it's best to redirect stderr. The ASAN_OPTIONS
> >> environment variable can be used for this. I put this in my ~/.bashrc:
> >>
> >> export ASAN_OPTIONS="check_initialization_order=1:strict_init_order=1:detect_stack_use_after_return=1:detect_leaks=0:log_path=/home/pel/asan.log:abort_on_error=1"
> >>
> >> The relevant part to redirect errors is "log_path=/home/pel/asan.log"
> >> (obviously you can put a different file name)
> >>
> >> See https://github.com/google/sanitizers/wiki/AddressSanitizerFlags
> >> for more details.
> >>
> >> > FWIW though, I suspect that a skilled practitioner might be able
> >> > to suss out the actual cause of the bug with the coredump I already have.
> >>
> >> It may not be so easy with a gdb stack alone: the memory error may
> >> have happened much earlier than where the crash is detected in gdb.
> >> That's why asan helps: if freed memory is accessed for example, the
> >> error will be reported immediately when accessed, and asan will give
> >> more information:
> >> - the stack where freed memory is accessed
> >> - the stack where memory was previously freed
> >> - the stack where memory was previously allocated
> >>
> >> Regards
> >> Dominique
> >
> > Ok, sounds good. I've set the logging to $HOME/asan-$$.pid. Will report back when I have results.
>
>
> Hi Frew
>
> I downloaded your dotfiles from github and used them.
> I noticed dotfiles for awesome so I suspected that you used
> awesome and so I used it too. Awesome window manager
> also happened to be used in the other crash reported a
> few days ago. Awesome causes more resizes than non
> tiling window manager, which I think is the key to reproduce
> the bug.
>
> I managed to reproduce a crash with a asan build of
> vim-7.4.1829 using your dotfile. I'm not sure that my
> crash is related to your crash, but it's crash anyway.
> Asan reports:
> [ ... ]

I'm impressed! That's some solid dedication! 👏👏

Hopefully someone more well versed in C / vim (like Bram :) can get it fixed

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