Remove `GHC.Desugar` from `base` (!15433) · Merge requests · Glasgow Haskell Compiler / GHC

Wolfgang Jeltsch requested to merge wip/jeltsch/ghc-desugar-removal into master Jan 27, 2026

GHC.Desugar was deprecated and should have been removed in GHC 9.14. However, the removal was forgotten, although there was a code block that was intended to trigger a compilation error when the GHC version in use was 9.14 or later. This code sadly didn’t work, because the __GLASGOW_HASKELL__ macro was misspelled as __GLASGOW_HASKELL. This merge request makes up for this.

Remove `GHC.Desugar` from `base`

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