2882. [bug] Remove memory context from list of active contexts

                        before clearing 'magic'. [RT #21274]

CHANGES

+2882.	[bug]		Remove memory context from list of active contexts
+			before clearing 'magic'. [RT #21274]
+
 2881.	[bug]		Reduce the amount of time the rbtdb write lock
 			is held when closing a version. [RT #21198]
 

lib/isc/mem.c

@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: mem.c,v 1.155 2010/03/04 23:50:34 tbox Exp $ */
+/* $Id: mem.c,v 1.156 2010/05/12 00:46:55 marka Exp $ */
 
 /*! \file */
 
@@ -1050,14 +1050,14 @@ destroy(isc__mem_t *ctx) {
 	unsigned int i;
 	isc_ondestroy_t ondest;
 
-	ctx->common.impmagic = 0;
-	ctx->common.magic = 0;
-
 	LOCK(&lock);
 	ISC_LIST_UNLINK(contexts, ctx, link);
 	totallost += ctx->inuse;
 	UNLOCK(&lock);
 
+	ctx->common.impmagic = 0;
+	ctx->common.magic = 0;
+
 	INSIST(ISC_LIST_EMPTY(ctx->pools));
 
 #if ISC_MEM_TRACKLINES