diff --git a/gcc/fortran/frontend-passes.c b/gcc/fortran/frontend-passes.c
index c106ee0957a2ab0acccf4abeb3b381b504581339..6ffe072b185959286756dc5cdf020f5d124f89a0 100644
--- a/gcc/fortran/frontend-passes.c
+++ b/gcc/fortran/frontend-passes.c
@@ -2653,7 +2653,7 @@ doloop_code (gfc_code **c, int *walk_subtrees ATTRIBUTE_UNUSED,
 
 	      do_sym = cl->ext.iterator->var->symtree->n.sym;
 
-	      if (a->expr && a->expr->symtree
+	      if (a->expr && a->expr->symtree && f->sym
 		  && a->expr->symtree->n.sym == do_sym)
 		{
 		  if (f->sym->attr.intent == INTENT_OUT)
diff --git a/gcc/testsuite/gfortran.dg/do_check_19.f90 b/gcc/testsuite/gfortran.dg/do_check_19.f90
new file mode 100644
index 0000000000000000000000000000000000000000..1373a7374cee40f364d17fb665e746ef80b166ba
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/do_check_19.f90
@@ -0,0 +1,21 @@
+! { dg-do compile }
+! { dg-prune-output "Obsolescent feature: Alternate-return argument" }
+! PR fortran/103717 - ICE in doloop_code
+! Contributed by G.Steinmetz
+
+program p
+  integer :: i
+  do i = 1, 2
+     call s(i) ! { dg-error "Missing alternate return specifier" }
+  end do
+contains
+  subroutine s(*)
+  end
+end
+
+recursive subroutine s(*)
+  integer :: i
+  do i = 1, 2
+     call s(i) ! { dg-error "Missing alternate return specifier" }
+  end do
+end