Fix Trac #2931

Fix the lexical analyser when it encounters 'x<EOF> and Template
Haskell is on.

diff --git a/compiler/parser/Lexer.x b/compiler/parser/Lexer.x
index e8f54ba..b3b2336 100644 (file)
--- a/compiler/parser/Lexer.x
+++ b/compiler/parser/Lexer.x
@@ -1243,11 +1243,11 @@ lex_char_tok span _buf _len = do        -- We've seen '
                -- We've seen 'x, where x is a valid character
                --  (i.e. not newline etc) but not a quote or backslash
           case alexGetChar' i2 of      -- Look ahead one more character
-               Nothing -> lit_error
                Just ('\'', i3) -> do   -- We've seen 'x'
                        setInput i3 
                        finish_char_tok loc c
                _other -> do            -- We've seen 'x not followed by quote
+                                       -- (including the possibility of EOF)
                                        -- If TH is on, just parse the quote only
                        th_exts <- extension thEnabled  
                        let (AI end _ _) = i1