re PR fortran/91485 (Erroneous conflict between variable x and operator(.x.))

2019-08-18  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/91485
	module.c (gfc_match_use): User defined operator cannot conflict with
	a rename symbol.

2019-08-18  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/91485
	* gfortran.dg/pr91485.f90: New test.

From-SVN: r274630

gcc/fortran/ChangeLog

+2019-08-18  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/91485
+	module.c (gfc_match_use): User defined operator cannot conflict with
+	a rename symbol.
+
 2019-08-17  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/82992

gcc/fortran/module.c

@@ -647,7 +647,7 @@ gfc_match_use (void)
 	    new_use->op = INTRINSIC_USER;
 
 	  st = gfc_find_symtree (gfc_current_ns->sym_root, name);
-	  if (st)
+	  if (st && type != INTERFACE_USER_OP)
 	    {
 	      if (m == MATCH_YES)
 		gfc_error ("Symbol %qs at %L conflicts with the rename symbol "

gcc/testsuite/ChangeLog

+2019-08-18  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/91485
+	* gfortran.dg/pr91485.f90: New test.
+
 2019-08-17  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/82992

gcc/testsuite/gfortran.dg/pr91485.f90

+! { dg-do compile }
+module foo
+   implicit none
+   interface operator(.x.)
+      module procedure product
+   end interface operator(.x.)
+   contains
+      function product(x, y)
+         real, intent(in) :: x, y
+         real :: product
+         product = x * y
+      end function product
+end module foo
+
+module gfcbug155
+   implicit none
+   contains
+      subroutine print_prod (x, y)
+         use foo, only : operator(.x.)
+         implicit none
+         real :: x, y
+         print *, x .x. y
+      end subroutine print_prod
+end module gfcbug155