Tracking ticket: #19321 (closed)

Highlights

• QuickLook impredicativity (#18126)
• Support DuplicateRecordFields with PatternSynonyms (!4467 (closed), @adamgundry)
• -Wambiguous-fields (!4770 (closed), @adamgundry)
• NoFieldSelectors extension (!4743 (closed), @adamgundry)
• RecordDotSyntax (!4532 (closed), @shayne-fletcher-da)
• GHC2021 (!4853 (closed), @nomeata)
• -finfo-table-map and -fdistinct-constructor-tables (!3469 (merged), @mpickering)
• #14422 (comment 321645), (@sgraf812)
• bytestring-0.11 (!4641 (closed), #19091 (closed))
• Sized integer primop rework (#19026 (closed), wiki, @Ericson2316)
• Merge ghc-exactprint (!2418 (closed), @alanz)
• BoxedRep (#17526 (closed), @bgamari)
• ARM NCG backend and Apple ARM support (!5575 (merged), @angerman)
• GHCi breakpoint ignore count (#19157 (closed), @RolandSenn)
• UnliftedDataTypes (!2218 (closed), @sgraf812)
• Cost-centre profiling support for pinned allocations (@bgamari, #7275 (closed))
• the cmpSymbol and cmpNat functions in GHC.TypeLits (@dwincort, !3575 (closed))
• putDoc and getDoc in template-haskell (!3330 (closed), @luke-lau, #5467 (closed))