Dominique wrote:

> A simpler way to reproduce it when vim-8.2.2077 is built with asan:
> ```
> $ ./vim --clean crash.txt -c p
> Vim: Caught deadly signal ABRT
> Vim: Finished.
> Aborted (core dumped)
> ```
> Where crash.txt is the attached file which contains combined
> characters:
> 
> [crash.txt](https://github.com/vim/vim/files/5625951/crash.txt)

Thanks for narrowing down the problem.  The text contains more combining
characters than Vim can handle, mb_ptr2len() returns more than
MB_MAXBYTES.

I'll fix this specific problem, but there might be more.  Can the fuzzer
be instructed to do all kinds of commands with this text?

-- 
MESKIMEN'S LAW
    There's never time to do it right, but always time to do it over.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///

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