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Summary:
Trying to use `static` expressions without the `-XStaticPointers`
extension enabled can lead to runtime errors. Normally, such a situation isn't
possible, but Template Haskell provides a backdoor that allows it to happen,
as shown in #14204.
To prevent this, we ensure that `-XStaticPointers` is enabled when renaming
`static` expressions.
Test Plan: make test TEST=T14204
Reviewers: facundominguez, austin, bgamari, simonpj
Reviewed By: facundominguez, simonpj
Subscribers: simonpj, rwbarton, thomie
GHC Trac Issues: #14204
Differential Revision: https://phabricator.haskell.org/D3931
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