Index: trans-expr.c
===================================================================
--- trans-expr.c	(revision 226006)
+++ trans-expr.c	(working copy)
@@ -5921,13 +5921,16 @@ gfc_conv_procedure_call (gfc_se * se, gf
   vec_safe_reserve (retargs, arglen);
 
   /* Add the return arguments.  */
-  retargs->splice (arglist);
+  if (!vec_safe_is_empty (arglist))
+    retargs->splice (arglist);
 
   /* Add the hidden present status for optional+value to the arguments.  */
-  retargs->splice (optionalargs);
+  if (!vec_safe_is_empty (optionalargs))
+    retargs->splice (optionalargs);
 
   /* Add the hidden string length parameters to the arguments.  */
-  retargs->splice (stringargs);
+  if (!vec_safe_is_empty (stringargs))
+    retargs->splice (stringargs);
 
   /* We may want to append extra arguments here.  This is used e.g. for
      calls to libgfortran_matmul_??, which need extra information.  */