[Bug 52867] New: System.Globalization.CultureInfo.GetCultureInfo fails for 'en' value

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52867

Bug ID: 52867
           Summary: System.Globalization.CultureInfo.GetCultureInfo fails
                    for 'en' value
           Product: Wine
           Version: 7.6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 72261
  --> https://bugs.winehq.org/attachment.cgi?id=72261
stacktrace

(filing under ntdll, as that where relevant files were before the commit series
that most likely broke it)

After upgrading to 7.6, still occurring in 7.7, a regression was made - the
last published dnSpy version had been running relatively well in its basic
functionality (I'm actually not any good with it), other than minor display
glitches; now it stacktraces immediately.

I believe the stacktrace makes it clear what happens and why I suspect that
locale commit series are at fault here. That release of dnSpy embeds its mono
environment, so it's not a wine-mono problem.