Index: ltrace-0.7.91+git20230705.8eabf68/expr.c
===================================================================
--- ltrace-0.7.91+git20230705.8eabf68.orig/expr.c
+++ ltrace-0.7.91+git20230705.8eabf68/expr.c
@@ -171,89 +171,6 @@ expr_destroy(struct expr_node *node)
 	abort();
 }
 
-static int
-expr_alloc_and_clone(struct expr_node **retpp, struct expr_node *node, int own)
-{
-	*retpp = node;
-	if (own) {
-		*retpp = malloc(sizeof **retpp);
-		if (*retpp == NULL || expr_clone(*retpp, node) < 0) {
-			free(*retpp);
-			return -1;
-		}
-	}
-	return 0;
-}
-
-int
-expr_clone(struct expr_node *retp, const struct expr_node *node)
-{
-	struct expr_node *nlhs;
-	/* Must be a known value to distinguish EXPR_OP_CALL2
-	   from EXPR_OP_CALL1 or EXPR_OP_UP.  */
-	struct expr_node *nrhs = NULL;
-
-	*retp = *node;
-
-	switch (node->kind) {
-
-	case EXPR_OP_ARGNO:
-	case EXPR_OP_SELF:
-		return 0;
-
-	case EXPR_OP_CONST:
-		return value_clone(&retp->u.value, &node->u.value);
-
-	case EXPR_OP_NAMED:
-		if (node->u.name.own
-		    && (retp->u.name.s = strdup(node->u.name.s)) == NULL)
-			return -1;
-		return 0;
-
-	case EXPR_OP_INDEX:
-		if (expr_alloc_and_clone(&nlhs, node->lhs, node->own_lhs) < 0)
-			return -1;
-
-		if (expr_alloc_and_clone(&nrhs, node->u.node.n,
-					 node->u.node.own) < 0) {
-			if (nlhs != node->lhs) {
-				expr_destroy(nlhs);
-				free(nlhs);
-			}
-			return -1;
-		}
-
-		retp->lhs = nlhs;
-		retp->u.node.n = nrhs;
-		return 0;
-
-	case EXPR_OP_CALL2:
-		if (expr_alloc_and_clone(&nrhs, node->u.call.rhs,
-					 node->u.call.own_rhs) < 0)
-			return -1;
-		retp->u.call.rhs = nrhs;
-		/* Fall through.  */
-
-	case EXPR_OP_UP:
-	case EXPR_OP_CALL1:
-		if (expr_alloc_and_clone(&nlhs, node->lhs, node->own_lhs) < 0) {
-			if (node->kind == EXPR_OP_CALL2
-			    && node->u.call.own_rhs
-			    && nrhs != NULL) {
-				expr_destroy(nrhs);
-				free(nrhs);
-				return -1;
-			}
-		}
-
-		retp->lhs = nlhs;
-		return 0;
-	}
-
-	assert(!"Invalid value of node kind");
-	abort();
-}
-
 int
 expr_is_compile_constant(struct expr_node *node)
 {
Index: ltrace-0.7.91+git20230705.8eabf68/expr.h
===================================================================
--- ltrace-0.7.91+git20230705.8eabf68.orig/expr.h
+++ ltrace-0.7.91+git20230705.8eabf68/expr.h
@@ -125,9 +125,6 @@ void expr_init_cb2(struct expr_node *nod
 /* Release the data inside NODE.  Doesn't free NODE itself.  */
 void expr_destroy(struct expr_node *node);
 
-/* Copy expression NODE into the area pointed to by RETP.  Return 0 on
- * success or a negative value on failure.  */
-int expr_clone(struct expr_node *retp, const struct expr_node *node);
 
 /* Evaluate the expression NODE in context of VALUE.  ARGUMENTS is a
  * dictionary of named and numbered values that NODE may use.  Returns