From 809b22d18d20e59a6320c62bbff29bd578f0b65a Mon Sep 17 00:00:00 2001
From: Serge Tupchii <serge.tupchii@protonmail.com>
Date: Tue, 8 Dec 2020 21:22:34 +0100
Subject: [PATCH] Fix crash (segfault) in etags on generating tags for Erlang
 files

* lib-src/etags.c: Set allocated and lastlen to zero, after
freeing last ptr in Erlang_functions to prevent dereferencing NULL
pointer (bug#45122).

Copyright-paperwork-exempt: yes

(cherry picked from commit 2d8f0364fcd1d5dad2b82dd3a9af870b03854547)
---
 lib-src/etags.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib-src/etags.c b/lib-src/etags.c
index f761a7b7c33..502f90920d2 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -6062,6 +6062,7 @@ Erlang_functions (FILE *inf)
 	    {
 	      free (last);
 	      last = NULL;
+	      allocated = lastlen = 0;
 	    }
 	}
       else
-- 
2.39.2