From 8cd6be853b61798a5fd4114292c62bb9384497bc Mon Sep 17 00:00:00 2001
From: Tucker Evans <tuckerevans24@gmail.com>
Date: Sat, 3 Aug 2019 17:45:09 -0400
Subject: Fix double free error

---
 node.c  | 5 ++++-
 scope.c | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/node.c b/node.c
index fbbfd14..586ed52 100644
--- a/node.c
+++ b/node.c
@@ -47,7 +47,10 @@ node *n;
 {
 	node *tmp;
 
-	for(tmp = n; tmp; tmp = n = n->next) {
+	for(tmp = n; tmp;) {
+		n = tmp->next;
 		free(tmp);
+		tmp = NULL;
+		tmp = n;
 	}
 }
diff --git a/scope.c b/scope.c
index 11a9c5b..6706765 100644
--- a/scope.c
+++ b/scope.c
@@ -35,6 +35,7 @@ scope *s;
 	}
 
 	free(s);
+	s = NULL;
 }
 
 /*Copied from Compilers, Aho*/
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