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This is not a bug report: there is no specific bug being
reported.

Instead, it is a feature request, but I'd like to reject it,
as it is unimplementable, in a generic, platform-independent
way. The fact that WAD only works for the main thread should
be reported as a bug report to the WAD maintainers.

If you think something should be done about this, please
contribute patches. I personally prefer to use a
fully-featured debugger to analyse problems in extension
modules.