#2304: unicode digits misparsed in escape sequences
------------------------+---------------------------------------------------
Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler (Parser)
Version: 6.8.2 | Severity: normal
Keywords: | Testcase:
Architecture: Unknown | Os: Linux
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{{{
*> "\₁"
*** Exception: parser/Ctype.lhs:(91,13)-(347,35): Non-exhaustive patterns
in case
*> "\๔"
*** Exception: parser/Ctype.lhs:(91,13)-(347,35): Non-exhaustive patterns
in case
}}}
I haven't seen ghc's code, but I bet it uses something like `let (digits,
str') = span isDigit str in chr (read digits) : parse str'` to process
escape sequences in string/character literals. This is broken because
`isDigit` returns `True` for a lot of non-`['0'..'9']` characters, such as
subscripts, Thai digits, double-wide digits, etc.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2304>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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