Stretch - bash crash when reach ulimit file size

[Felipe Salvador]

Hi list,
setting

        ulimit -f 1024

and running (for example)

    $ while true; do echo a>>a; done

makes bash crash when file size is reached

      Warning: Program '/bin/bash' crashed.

    $ du a
    1024        /home/felipe/a

I would expect an error or something else (exit?)

Is it a bug?

bash:amd64/stretch 4.4-5 uptodate

Thank you

Regards
-- 
Felipe Salvador