#3079: LANGUAGE pragma fails if preceded by too many comments
-----------------------------+----------------------------------------------
Reporter: Deewiant | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler (Parser)
Version: 6.10.1 | Severity: critical
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Putting too much whitespace and/or comment text before a LANGUAGE pragma
seems to cause parsing it to fail. In the following, the closing `}` of
the comment is byte 1025. Perhaps the whole thing is expected to fit into
the first 1024 bytes or be wholly inside an aligned 1024-byte range?
{{{
-- xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-- xxxxxxxxxxxxxxxxxxxxxxxx
-- xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-- xxxxxxxxxxxxxxxxxxxxxxx
-- xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
--
--xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
{-# LANGUAGE ScopedTypeVariables #-}
main = return ()
}}}
Removing absolutely anything prior to the start of the LANGUAGE pragma
will make it work: one of the exes, an entire line, any whitespace,
whatever.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3079>
GHC <http://www.haskell.org/ghc/>
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