[CRIU] race in the build system?

[Cyrill Gorcunov]

On Tue, Dec 08, 2015 at 03:40:58PM -0700, Tycho Andersen wrote:
> Hi all,
> 
> As of a pull today (haven't bisected so not sure what caused it), I'm
> seeing races in the build system if I do make -j4. Sometimes it dies
> with:

Have you been switching between branches without cleaning up the
previous make results?

I will try to reproduce this problem tomorrow, maybe there is
indeed some issue. Please cleanup the tree for a while.