Note the behavior difference in 'xpcall' #36
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From the
yieldable pcall/xpcallit is easy to assume everything aboutpcall/xpcallis yieldable, but it was actually only about the target function being called, not the error handler.In Luau, yielding from
xpcallerror handler is considered an 'error in error handling'.Lua 5.2 went really hard into yielding support from all locations, which comes with the complexity of each operator and especially the error handler which takes an extra record in the call info data.
This update notes this difference.