[Bug c++/25407] New: ICE when assigning value of variable passed to template as reference

["eteran at alum dot rit dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

The following code produces an ICE in both gcc-3.4.4 and gcc-3.4.5, I've been
told it compiles fine in a 4.x version of the compiler.

int var1 = 0;
template <int &v> inline void get_data() { int var2; var2 = v; }
int main() {
        get_data<var1>();
        return 0;
}

preprocessed source is as followes:

// /usr/libexec/gcc/i686-pc-linux-gnu/3.4.5/cc1plus -quiet -D_GNU_SOURCE
test.cc -quiet -dumpbase test.cc -mtune=pentiumpro -auxbase test -Wall -W -o -
-frandom-seed=0
# 1 "test.cc"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "test.cc"


int var1 = 0;
template <int &v> inline void get_data() { int var2; var2 = v; }
int main() {
 get_data<var1>();
 return 0;
}


it produces the following output when compiled with "g++ -Wall -W test.cc -c":

test.cc: In function `void get_data() [with int&v = ((int&)(&var1))]':
test.cc:6:   instantiated from here
test.cc:4: internal compiler error: in build_modify_expr, at cp/typeck.c:5190
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
Preprocessed source stored into /tmp/ccNxQKpG.out file, please attach this to
your bugreport.

I am not sure if it matters, but I am running a gentoo installation, gcc was
compiled with the following CFLAGS/CXXFLAGS:

-march=pentium-m -pipe -O2

My system is running on the following kernel:

System uname: 2.6.14-gentoo-r4 i686 Intel(R) Pentium(R) M processor 2.00GHz

If there is anything else you need, I'll be more than happy to provide it.

Evan Teran


-- 
           Summary: ICE when assigning value of variable passed to template
                    as reference
           Product: gcc
           Version: 3.4.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: eteran at alum dot rit dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25407