From: Eli Zaretskii <eliz@gnu.org>
Date: Wed, 31 Aug 2016 16:57:59 +0000 (+0300)
Subject: Fix a thinko in etags.c
X-Git-Tag: emacs-26.0.90~1666
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=4ec31277e7603484fd7a4d2d8e3d0eefe62c587c;p=emacs.git

Fix a thinko in etags.c

* lib-src/etags.c (invalidate_nodes): Don't try to dereference
a null pointer.
---

diff --git a/lib-src/etags.c b/lib-src/etags.c
index 95553e9c42a..bf4a8f7015d 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -2242,7 +2242,7 @@ invalidate_nodes (fdesc *badfdp, node **npp)
 		 with a right child.  */
 	      do {
 		np = pop_node (&stack);
-		if (np->fdp == badfdp)
+		if (np && np->fdp == badfdp)
 		  np->valid = false;
 	      } while (np && np->right == NULL);
 	    }