id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
1151,small program misbehaves with -fvia-C,Stefan O'Rear <stefanor@…>,simonpj,"{{{
stefan@stefans:/tmp$ mkdir bug
stefan@stefans:/tmp$ cd bug
stefan@stefans:/tmp/bug$ echo 'main = interact $ (show :: Bool -> String) . read' > bug.hs
stefan@stefans:/tmp/bug$ ghc -fasm bug.hs
stefan@stefans:/tmp/bug$ echo -n False | ./a.out
Falsestefan@stefans:/tmp/bug$ rm *
stefan@stefans:/tmp/bug$ echo 'main = interact $ (show :: Bool -> String) . read' > bug.hs
stefan@stefans:/tmp/bug$ ghc -fvia-C bug.hs
/tmp/ghc12591_0/ghc12591_0.hc: In function 'rr5_entry':

/tmp/ghc12591_0/ghc12591_0.hc:33:0:
     warning: assignment makes integer from pointer without a cast

/tmp/ghc12591_0/ghc12591_0.hc:36:0:
     warning: assignment makes integer from pointer without a cast
/tmp/ghc12591_0/ghc12591_0.hc: In function 'srg_entry':

/tmp/ghc12591_0/ghc12591_0.hc:108:0:
     warning: assignment makes integer from pointer without a cast

/tmp/ghc12591_0/ghc12591_0.hc:111:0:
     warning: assignment makes integer from pointer without a cast

/tmp/ghc12591_0/ghc12591_0.hc:115:0:
     warning: assignment makes integer from pointer without a cast
/tmp/ghc12591_0/ghc12591_0.hc: In function 'Main_main_entry':

/tmp/ghc12591_0/ghc12591_0.hc:153:0:
     warning: assignment makes integer from pointer without a cast

/tmp/ghc12591_0/ghc12591_0.hc:156:0:
     warning: assignment makes integer from pointer without a cast
/tmp/ghc12591_0/ghc12591_0.hc: In function 'ZCMain_main_entry':

/tmp/ghc12591_0/ghc12591_0.hc:195:0:
     warning: assignment makes integer from pointer without a cast

/tmp/ghc12591_0/ghc12591_0.hc:198:0:
     warning: assignment makes integer from pointer without a cast
stefan@stefans:/tmp/bug$ echo -n False | ./a.out
a.out: internal error: stg_ap_p_ret
    (GHC version 6.7.20070213 for i386_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted
stefan@stefans:/tmp/bug$ 
}}}

The exact error seen depends in a not-yet-characterised way on the program;
in addition to the above, correct behavior, immediate silent exit, and
""Segmentation fault"" have been seen.

Brandon S. Allbery on #haskell was able to reproduce using powerpc_apple_darwin (20070213)
Lennary Augustsson on #haskell was not, using 20070216 ""i386, Mac OS X""

Stefan",bug,closed,normal,6.8.1,Compiler,6.7,fixed,,,Unknown/Multiple,Unknown/Multiple,,Unknown,,,,