From f149e87354b31a8e638102aca3fc599552370cf4 Mon Sep 17 00:00:00 2001
From: Lucas K <lkocia@s3miclassical.com>
Date: Wed, 23 Dec 2020 10:28:08 -0800
Subject: [PATCH] fixed free() pointer error that was throwing segfaults on
 newer systems

---
 exponentialsum.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/exponentialsum.c b/exponentialsum.c
index 0e0bd6e..cbf58d9 100644
--- a/exponentialsum.c
+++ b/exponentialsum.c
@@ -251,8 +251,9 @@ complex double exponentialsum(int *k, int *Q, int *D, int **J) {
       setWalker = setE; // 'a'=setE->data
       while(setWalker != NULL) {
 	if(setWalker->next->data == setK->data) {
-	  free(setWalker->next);
+	  setWalker2 = setWalker->next;
 	  setWalker->next = setWalker->next->next; // delete 'b'
+	  free(setWalker2);
 	  break;
 	}
 	setWalker = setWalker->next;
-- 
2.30.2