GHC master fails to build with alex 3.5.1.0
Summary
Upgrading to Alex 3.5.1.0 makes compilation of GHC on master fail because of 7dfdf3d9 (cc @hsyl20)
compiler/GHC/Parser/Lexer.x:2871:20: error: [GHC-88464]
Data constructor not in scope: C# :: t0 -> Char
Suggested fixes:
• Perhaps use one of these:
‘GHC.Exts.C#’ (imported from GHC.Exts),
‘GHC.Exts.D#’ (imported from GHC.Exts),
‘GHC.Exts.F#’ (imported from GHC.Exts)
• Add ‘C#’ to the import list in the import of ‘GHC.Exts’
(at _build/stage0/compiler/build/GHC/Parser/Lexer.hs:100:1-202).
|
2871 |
| ^^
compiler/GHC/Parser/Lexer.x:2871:24: error: [GHC-88464]
Variable not in scope: chr# :: Int# -> t0
Suggested fixes:
• Perhaps use one of these:
‘GHC.Exts.chr#’ (imported from GHC.Exts),
‘chr’ (imported from Data.Char)
• Add ‘chr#’ to the import list in the import of ‘GHC.Exts’
(at _build/stage0/compiler/build/GHC/Parser/Lexer.hs:100:1-202).
|
2871 |
| ^^^^
Steps to reproduce
Try building master with alex 3.5.1.0
Environment
- GHC version used: 9.8.2, alex 3.5.1.0
Solution
It seems to be sufficient to qualify the names with GHC.Exts