https://bugs.winehq.org/show_bug.cgi?id=50168
--- Comment #5 from Hans Leidekker hans@meelstraat.net --- (In reply to Dmitry Timoshkov from comment #4)
However it's not trivial to reproduce. I had to run the built binaries on a virtualization server with OpenVZ kernel 2.6.32.
Looks like a variation of bug 49938. The new path uses getrandom() if detected at build time, otherwise it falls back to opening /dev/urandom like we did before.
So your build is probably from a newer system where getrandom() is available and kernel 2.6.32 is certainly too old to support it.