From b70388ee72a7ab74eb45c987e62d731f63843a58 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Thu, 25 Aug 2016 18:05:46 +0200
Subject: Fixed overwriting errors

---
 compiler/syntax.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'compiler/syntax.c')

diff --git a/compiler/syntax.c b/compiler/syntax.c
index b4ff9dc..3d5e18d 100644
--- a/compiler/syntax.c
+++ b/compiler/syntax.c
@@ -22,6 +22,7 @@ unsigned empty_args_list(arg_list* list) {
 }
 
 void cpy_expression(expression* dst, expression* src) {
+	free_expression(dst);
 	dst->kind = src->kind;
 	switch (dst->kind) {
 		case EXPR_INT:
@@ -136,6 +137,8 @@ void free_expression(expression* expr) {
 			my_free(expr->var2);
 			break;
 	}
+
+	expr->var1 = expr->var2 = NULL;
 }
 
 void free_arg_list(arg_list* list) {
-- 
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