[Bug 46273] New: rand() doesn' t get a unique state per-fiber like it appears to on native windows

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46273

            Bug ID: 46273
           Summary: rand() doesn't get a unique state per-fiber like it
                    appears to on native windows
           Product: Wine
           Version: 1.8.7
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winecrt0
          Assignee: wine-bugs at winehq.org
          Reporter: winebz at pengaru.com
      Distribution: ---

I've been using WINE to test windows builds during game development in Debian
GNU/Linux.

I use the windows fibers API to implement coroutines and in testing on Win7
noticed a bunch of coroutine-backed game objects using rand() for randomized
visible things were unexpectedly looking uniform.  In WINE they had all
appeared distinctly random.

I'm not an experienced windows developer, but it /appears/ that in Win7,
calling rand() in a newly created fiber restarts from the default seed rather
than sharing the same PRNG state with the other fibers.  It's rather odd, but I
verified it with a smaller test program that only printed the return value from
rand() in new fibers, and they were all printing the same value.

It's possible this is already fixed in a newer WINE version, I'm limited to
what's bundled in debian 9.5 (1.8.7).  Or maybe this is considered a Windows
bug and WINE's behavior is deliberately different.

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