#16229: Dump-parsed-ast fails for very large Fractional number constants -------------------------------------+------------------------------------- Reporter: alanz | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.10.1 Component: Compiler | Version: 8.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- The existing test file `T15271.hs` has {{{#!hs main = do print 1e646457008 print 1e646457009 -- T15271: This incorrectly printed 0.0 print 1e1555550000 -- This is still infinity print 1e1000000000 -- T15271: This incorrectly printed 0.0 }}} Trying to run `ghc --dump-parsed-ast` T15271.hs` fails, using up all available memory. When dumping the file in ghc-exacptrint, the start looks like this {{{ ({ tests/examples/ghc88-copied/T15271.hs:2:9-19 } Just (Ann (DP (0,1)) [] [] [((G AnnVal),DP (0,0))] Nothing Nothing) (HsOverLit (NoExt) (OverLit (NoExt) (HsFractional (FL (SourceText "1e646457008") (False) (:% (100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 ..... }}} I am not sure if this is an actual problem, but it is worth noting. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16229 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler