From 297e4a9bb6f0086b6287a61820188be7cc240082 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 10 Feb 2017 01:15:36 -0500
Subject: research/heap.sh: Clear freed block's next_free pointer

Otherwise, __malloc() would fail to detect the last free block.
---
diff --git a/research/heap.sh b/research/heap.sh
index 54ce1e3..e8fbd6f 100644
--- a/research/heap.sh
+++ b/research/heap.sh
@@ -39,4 +39,6 @@ __free()
 		eval "${__free_tail}_next_free=\${__ptr}"
 		eval "${__heap}_free_tail=\${__ptr}"
 	fi
+	# Ensure next_free is null to delimit list end
+	eval "${__ptr}_next_free="
 }
--
cgit v0.9.1