From: Thomas Heller <theller@ctypes.org>
Date: Fri, 19 Oct 2001 13:49:35 +0000 (+0000)
Subject: Fix for Bug #216405:
X-Git-Tag: v2.2.1c1~1150
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fdc1bd305bcf8d6ebefe98313fa6c310623a0cb9;p=python

Fix for Bug #216405:
use the correct base for a buffer object in _PyBuffer_FromObject.
---

diff --git a/Objects/bufferobject.c b/Objects/bufferobject.c
index 242261f718..57d031cade 100644
--- a/Objects/bufferobject.c
+++ b/Objects/bufferobject.c
@@ -73,11 +73,13 @@ _PyBuffer_FromObject(PyObject *base, int offset, int size,
 		offset = count;
 	if ( offset + size > count )
 		size = count - offset;
-
-	/* if the base object is another buffer, then "deref" it */
-	if ( PyBuffer_Check(base) )
+	
+	/* if the base object is another buffer, then "deref" it,
+	 * except if the base of the other buffer is NULL
+	 */
+	if ( PyBuffer_Check(base) && (((PyBufferObject *)base)->b_base) )
 		base = ((PyBufferObject *)base)->b_base;
-
+	
 	return _PyBuffer_FromMemory(base, (char *)p + offset, size, readonly);
 }