re PR fortran/30683 ([4.2 only] internal compiler error: Segmentation fault)

2007-02-02  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/30683
	* resolve.c (resolve_generic_f): Check for non-NULL sym.
	* gfortran.dg/interface_10.f90: New test.

From-SVN: r121531

gcc/fortran/ChangeLog

@@ -1,3 +1,8 @@
+2007-02-02  Steven G. Kargl <kargl@gcc.gnu.org>
+
+	PR fortran/30683
+	* resolve.c (resolve_generic_f): Check for non-NULL sym.
+
 2007-02-02  Roger Sayle  <roger@eyesopen.com>
 
 	* trans.c (gfc_build_array_ref): Use STRIP_TYPE_NOPS to eliminate

gcc/fortran/resolve.c

@@ -1315,7 +1315,7 @@ generic:
 
   /* Last ditch attempt.  See if the reference is to an intrinsic
      that possesses a matching interface.  14.1.2.4  */
-  if (!gfc_intrinsic_name (sym->name, 0))
+  if (sym && !gfc_intrinsic_name (sym->name, 0))
     {
       gfc_error ("There is no specific function for the generic '%s' at %L",
 		 expr->symtree->n.sym->name, &expr->where);

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2007-02-02  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/30683
+	* gfortran.dg/interface_10.f90: New test.
+
 2007-02-02  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* gcc.dg/builtins-20.c: Add more cases.

gcc/testsuite/gfortran.dg/interface_10.f90

@@ -0,0 +1,57 @@
+! { dg-do compile }
+! PR fortran/30683
+! Code contributed by Salvatore Filippone.
+!
+module class_fld
+   integer, parameter :: int_ = 1
+  integer, parameter :: bnd_ = 2
+  type fld
+     integer                 :: size(2)
+  end type fld
+  !
+  !  This interface is renaming the SIZE intrinsic procedure,  
+  !  which led to a segmentation fault when trying to resolve
+  !  the intrinsic symbol name.
+  !
+  interface size
+     module procedure get_fld_size
+  end interface
+contains
+  function get_fld_size(f)
+    integer :: get_fld_size(2)
+    type(fld), intent(in) :: f
+    get_fld_size(int_) = f%size(int_)
+    get_fld_size(bnd_) = f%size(bnd_)
+  end function get_fld_size
+end module class_fld
+
+module class_s_fld
+  use class_fld
+  type s_fld
+     type(fld) :: base
+     real(kind(1.d0)), pointer :: x(:)  => null()
+  end type s_fld
+  interface x_
+     module procedure get_s_fld_x
+  end interface
+contains
+  function get_s_fld_x(fld)
+    real(kind(1.d0)), pointer :: get_s_fld_x(:)
+    type(s_fld), intent(in) :: fld
+    get_s_fld_x => fld%x
+  end function get_s_fld_x
+end module class_s_fld
+
+module class_s_foo
+contains
+  subroutine solve_s_foo(phi,var)
+    use class_s_fld
+    type(s_fld), intent(inout) :: phi
+    real(kind(1.d0)), intent(out), optional :: var
+    integer :: nsz
+    real(kind(1.d0)), pointer :: x(:)
+    x => x_(phi)
+    nsz=size(x)
+  end subroutine solve_s_foo
+end module class_s_foo
+! { dg-final { cleanup-modules "class_s_fld class_fld class_s_foo" } }