We don't actually want any of these things, which should really be hidden
behind the ifdefs given here to disable them when they are not being
used (as we do).

--- execute_cmd.c	2021-01-15 09:38:55.730307635 +1100
+++ execute_cmd.c	2021-01-15 09:43:41.046896754 +1100
@@ -286,12 +286,18 @@
     {
       if (currently_executing_command->type == cm_simple)
 	return currently_executing_command->value.Simple->line;
+#ifdef COND_COMMAND
       else if (currently_executing_command->type == cm_cond)
 	return currently_executing_command->value.Cond->line;
+#endif
+#ifdef DPAREN_ARITHMETIC
       else if (currently_executing_command->type == cm_arith)
 	return currently_executing_command->value.Arith->line;
+#endif
+#ifdef ARITH_FOR_COMMAND
       else if (currently_executing_command->type == cm_arith_for)
 	return currently_executing_command->value.ArithFor->line;
+#endif
       else
 	return line_number;
     }