Deferred: Propagate progress correctly from unwrapped promises #3150
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Summary
Progress parameters are now correctly propagated from a deferred to which
another deferred resolved unwrapping it.
Thanks to @gibson042 for the report and a clear description of the problem
and the needed fix.
Fixes gh-3062
I'd like to get it in 3.0.0 as this bug is really unexpected and we've had a related external report.
Please review @jquery/core.
Checklist
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for completed items, if you're not sure leave them unchecked and we can assist.If needed, a docs issue/PR was created at https://github.com/jquery/api.jquery.comThanks! Bots and humans will be around shortly to check it out.