[GHC] #5188: Runtime error when allocating lots of memory

[GHC]

#5188: Runtime error when allocating lots of memory
---------------------------------+---------------------------
        Reporter:  knyblad       |            Owner:
            Type:  bug           |           Status:  patch
        Priority:  low           |        Milestone:  7.6.2
       Component:  GHCi          |          Version:  6.12.1
      Resolution:                |         Keywords:
Operating System:  Linux         |     Architecture:  x86
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
---------------------------------+---------------------------

Comment (by rwbarton):

 Casting to an unsigned integral type is defined to have "modulo 2^n^"
 semantics by C99 §6.3.1.3, so casting -1 to any unsigned integral type
 will result in the largest representable value of that type. But
 `HS_WORD_MAX` is okay too, and probably easier to read; I just didn't
 think to look for such a thing in `HsFFI.h`. (I find the proliferation of
 identical types `StgWord`, `W_`, `HsWord` a little confusing, but I'll get
 over it.)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5188#comment:14>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler