[Bug c++/48265] New: [4.6/4.7 Regression] ICE: SIGSEGV (recursion in value_dependent_expression_p) when variable is used uninitialised

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48265

           Summary: [4.6/4.7 Regression] ICE: SIGSEGV (recursion in
                    value_dependent_expression_p) when variable is used
                    uninitialised
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Looks similiar to PR46870, but this code is valid:

------- testcase.C -------
template < int > struct S
{
  S () { int i = i; i; };
};
--------------------------

Compiler output:
$ gcc -std=gnu++0x testcase.C
Program received signal SIGSEGV, Segmentation fault.
0x000000000054e883 in value_dependent_expression_p (expression=<value optimized
out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18065
18065     if (DECL_P (expression) && type_dependent_expression_p (expression))
(gdb) bt
#0  0x000000000054e883 in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18065
#1  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#2  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#3  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#4  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#5  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#6  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#7  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#8  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
#9  0x000000000054ea7e in value_dependent_expression_p (expression=<value
optimized out>) at /mnt/svn/gcc-trunk/gcc/cp/pt.c:18233
...