#5692: Source code with large floating constants in exponential notation cannot
be
compiled
--------------------------------+-------------------------------------------
Reporter: gracjan | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.2.1 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: 5688 |
--------------------------------+-------------------------------------------
Source code cannot be compiled:
{{{
main = do
print (123e124124124 :: Double)
}}}
where this one can be and will work after #5688 is fixed:
{{{
main = do
print (read "123e124124124" :: Double)
}}}
Haskell Report forces Float and Double to go through Rational:
http://www.haskell.org/onlinereport/haskell2010/haskellch6.html#x13-1360006.4.1
When exponent is big it produces very large Rational numbers. That takes a
lot of time and usually ends in out of memory condition.
This is similar to #5688, but at compile time.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5692>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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