ghc-internal: Fix incomplete matches on IOError
As noted in #25362 (closed), these incomplete matches were previously not being
warned about. They were easily addressed by use of
GHC.Internal.Event.Windows.withException.
Closes #25362 (closed).
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As noted in #25362 (closed), these incomplete matches were previously not being
warned about. They were easily addressed by use of
GHC.Internal.Event.Windows.withException.
Closes #25362 (closed).