Re: SIGBUS in Vim 7.4

Frew Schmidt <frioux@gmail.com> wrote:

> Ok, so I built and installed a fresh vim according to
> Dominique's instructions and attempted both asan and valgrind.
> Either those things don't work together, or I can repro the bug
> immediately. Here's the error:

I should have said: valgrind and asan don't work together indeed.
Either use a asan build, or use valgrind on a normal build (not stripped).

Actually trying both tools (but not a the same time!) can be
useful as some bugs are only found by one tool:
- asan cannot find accesses to uninitialized memory
- valgrind cannot find overflow to global and stack variables

> Note that this issue is *very* rare, maybe happens every few weeks,

It's likely to be easier to reproduce i.e less rare with asan or valgrind,
as any access to freed memory will be detected for example, whereas
without such tools, vim may often work by luck and once in a while
crash.

Regards
Dominique

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