pipe hang issue when running as SYSTEM

[Takashi Yano]

On Fri, 25 Mar 2022 10:01:53 -0700 (PDT)
Jeremy Drake wrote:
> On Fri, 25 Mar 2022, Takashi Yano wrote:
> 
> > I will submit v3 patch shortly.
> 
> I applied your v3 patch to 3.3.4 in
> https://github.com/msys2/msys2-runtime/pull/88 and re-ran my test action,
> and it worked as expected this time.
> 
> I've put out a call to test on the msys2-runtime issue to confirm that it
> also solves the real-world cases.

I have submitted v4 patch, which fixes the issue caused
when multiple pipes in the same process group exist.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>