[Tarantool-patches] [PATCH luajit] Fix predict_next() in parser (for real now).

[Sergey Kaplun]

Hi, Sergey!
Thanks for the review.

On 10.01.25, Sergey Bronnikov wrote:
> Hi, Sergey,
> 
> thanks for the patch!
> 
> test is passed with reverted patch.
> 
> With original reproducer luajit segfaults.
> 
> CMake options:  cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug 
> -DLUA_USE_APICHECK=ON -DLUA_USE_ASSERT=ON

You must run this test with Valgrind enabled to see the failure as it is
mentioned in the commit. The original reproducer is clumsy and unstable
-- any slight change of the parser may break it. This reproducer is much
simpler, robust, and more readable.

> 
> 
> Sergey
> 
> On 09.01.2025 18:01, Sergey Kaplun wrote:

<snipped>

> > +-- The parsing of the `for` iterator uses the incorrect check for
> > +-- `fs->bclim`, which allows the usage of an uninitialized value,
> > +-- so the test fails under Valgrind.

<snipped>

-- 
Best regards,
Sergey Kaplun