[Bug 49573] New: Sporadic page fault on 64bit prefix creation on macOS

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49573

Bug ID: 49573
           Summary: Sporadic page fault on 64bit prefix creation on macOS
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Mac OS X
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
   Regression SHA1: 9ec5be2cea3af2ca631ef0dce3208965058abb59

Created attachment 67719
  --> https://bugs.winehq.org/attachment.cgi?id=67719
+seh

Wine built with mingw and the macOS 10.13 SDK running on macOS 10.14.

The page fault doesn't always happen. Prefix is still created and winecfg runs.
This doesn't happen with a 32bit prefix.

Attached is a +seh log of a run where the page fault happened.