PR Summary

Export-ModuleMember cmdlet throws an exception if module functions are exported across language boundaries (Windows only). But a scriptblock LanguageMode property can be null if the scriptblock is created without a PowerShell context, and this can happen through the PowerShell API called from C#. In this case Export-ModuleMember throws erroneously when no language mode restrictions are in play.

Fix is to check if LanguageMode is null before comparing context and scriptblock language modes.

PR Checklist

• PR has a meaningful title
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• Summarized changes
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• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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