Ensure instructions being freed are removed from the tree

Author: ndptech

src/lib/unlang/compile.c

@@ -1464,6 +1464,12 @@ unlang_t *unlang_compile_children(unlang_group_t *g, unlang_compile_ctx_t *unlan
 					if (gext->value) {
 						skip_else = single->debug_name;
 					} else {
+						/*
+						 *	If this came from compile_single, then it will already
+						 *	have a number and be in the tree.
+						 */
+						if (single->number) fr_rb_remove(unlang_instruction_tree, single);
+
 						/*
 						 *	The condition never
 						 *	matches, so we can