id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
3546	Use of float type in unregistered build freezes program	dterei	igloo	"If you compile a ghc HEAD version in unregistered mode there is a bug that causes any programs compiled by this ghc to freeze when they try to access a float.

== build.mk ==
{{{
SRC_HC_OPTS     = -O -H64m
GhcStage1HcOpts = -O
GhcStage2HcOpts = -O2
GhcHcOpts       = -Rghc-timing
GhcLibHcOpts    = -O2 -XGenerics
GhcLibWays     += p
SplitObjs       = NO

HADDOCK_DOCS         = NO
BUILD_DOCBOOK_HTML   = NO
BUILD_DOCBOOK_PS     = NO
BUILD_DOCBOOK_PDF    = NO

GhcUnregisterised    = YES
GhcWithNativeCodeGen = NO
}}}

== Program which produces bug: ==
{{{
main = do
    putStrLn ""Print float test""
    putStrLn (show (1.2312341::Float))
}}}


== Steps to reproduce ==
  1. Compile latest version of ghc from darcs using the above build.mk configuration (other build.mk trigger the bug as well, must be unregistered though).
  2. Compile the above haskell program with this ghc.
  3. Run the program, it will freeze indefinitely
  4. The test case ''arith006'' also triggers the bug.

== My machine ==
  * x86, Ubuntu 9.04, 32 bit.
  * uname -v
{{{
Linux david-laptop 2.6.28-15-generic #49-Ubuntu SMP Tue Aug 18 18:40:08 UTC 2009 i686 GNU/Linux
}}}
   * gcc -v
{{{
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.3.3-5ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-targets=all --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4)
}}}"	merge	closed	high	6.12.1	Compiler		fixed	float unregistered freezes		Unknown/Multiple	Unknown/Multiple		Unknown	arith006