Re: [gofrontend-dev] [PATCH 1/2, libgo] Add support for missing reflection functions to gccgo for ppc64, ppc64le in gcc 4.9

["Lynn A. Boger" <laboger at linux dot vnet dot ibm dot com>]

Not sure I would call it "easy" but I was able to reproduce the problem 
and then get it to work with this, at least in my testcase:

  f := func(a ...string) error {
                        switch t := 
mv.CallSlice([]reflect.Value{reflect.ValueOf(a)})[0].Interface().(type) {
                        case error:
                                return t
                        default:
                                return nil
                        }
                }

On 02/06/2015 05:05 PM, Ian Lance Taylor wrote:
> On Fri, Feb 6, 2015 at 12:36 PM, Lynn A. Boger
> <laboger@linux.vnet.ibm.com> wrote:
> > I was told by the testers that this patch did not work.  The error message
> > was:
> >
> > > panic: interface conversion: interface is nil, not error
> > >
> > > goroutine 1 [running]:
> > > client.$nested1
> > >      /home/ubuntu/docker.mainline/src/github.com/docker/docker/api/
> > > client/cli.go:66
> > >
> > > github_com_docker_docker_api_client.Cmd.pN45_github_com_docker_docker_api_client.DockerCli
> > >      /home/ubuntu/docker.mainline/src/github.com/docker/docker/api/
> > > client/cli.go:84
> > > main.main
> > >      /home/ubuntu/docker/docker/docker.go:126
>
> That's easy to fix....
>
> Ian