[commit: ghc] wip/T9732's head updated: Apply compulsory unfoldings during desugaring. See Note [Unfolding while desugaring] for the rationale. (7ca6589)

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Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/T9732' now includes:

     c774b28 Implement new integer-gmp2 from scratch (re #9281)
     b11c8b8 Fix typo in panic message
     05feff2 Binding things matched by an unboxed pattern synonym should require a bang
     9d9b615 If pattern synonym is bidirectional and its type is some unboxed type T#, generate a worker function of type Void# -> T#, and redirect the wrapper (via a compulsory unfolding) to the worker.
     7ca6589 Apply compulsory unfoldings during desugaring. See Note [Unfolding while desugaring] for the rationale.