From ff6fa24786eb2c03c1af95e2559fa3fd0b2f3893 Mon Sep 17 00:00:00 2001
From: Gary Benson <gbenson@redhat.com>
Date: Thu, 9 Feb 2017 15:35:33 +0000
Subject: Fix NULL pointer dereference

This commit fixes a segmentation fault on tab completion when
certain debuginfo is installed:

  https://bugzilla.redhat.com/show_bug.cgi?id=1398387

gdb/ChangeLog:

	* symtab.c (add_symtab_completions): Prevent NULL pointer
	dereference.
---
 gdb/symtab.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gdb/symtab.c')

diff --git a/gdb/symtab.c b/gdb/symtab.c
index 356f480..2c141e5 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -5163,6 +5163,9 @@ add_symtab_completions (struct compunit_symtab *cust,
   struct block_iterator iter;
   int i;
 
+  if (cust == NULL)
+    return;
+
   for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
     {
       QUIT;
-- 
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