5.6.2 has been announced, with a fix for this.

On Sat, Sep 15, 2018, 10:42 AM TS <debts@xk2c.de> wrote:

> Hello,
>
> i am not subscribed, please cc me.
>
> in this bugreport
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908818
>
> i reported an issue with Zsh 5.6. Debian maintainers asked to report
> directly. So here it goes.
>
> The shortest test case i could come with is documented in
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908818#66
>
> Basically its a setup for startup profiling which did work up to 5.5.1
> but since 5.6 instead of displaying profiling data zsh says:
>
> zsh: suspended (tty output)
>
> i then have to 'fg' first to see the actual profiling data.
>
>
>
>
> kind regards,
>
>      Thilo
>
>