SIGSEGV in C2 Node::unique_ctrl_out on 11.0.4

[Vitaly Davidovich]

Hey Aleksey,

On Wed, Sep 18, 2019 at 4:43 PM Aleksey Shipilev <shade at redhat.com> wrote:

> On 9/18/19 10:31 PM, Vitaly Davidovich wrote:
> > We're seeing the below segfault occur sporadically when running Ant (i.e.
> > org.apache.tools.ant.launch.Launcher) as part of a build.  This is
> OpenJDK
> > 11.0.4.  I've not reported it there (yet) - wanted to see if the
> backtrace
> > rings a bell for any experts on this list.
>
> No relevant hits in bugtracker.
>
Yeah, my search prior to sending an email here also didn't net anything.

>
> > I can share more details of the hs_err file.
> Please try fastdebug builds. You can find a few here:
>   https://builds.shipilev.net/

Thanks.  This happens sporadically on our build farm, so it's likely going
to be very difficult to install enough fastdebug builds in there (nevermind
the impact to the farm).  I guess if nobody has an inkling, we'll need to
see how to proceed.

>
>
> Then searching https://bugs.openjdk.java.net/ for assert messages might
> give us the better idea
> about this.
>
> --
> Thanks,
> -Aleksey
>
> Thanks