From 569d4c7ad60ec84e69df02f74e0c013ff83b93c2 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 31 May 2022 01:19:32 -0700
Subject: [PATCH] Be more robust if doc file is corrupted
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* src/doc.c (Fsnarf_documentation): Don’t dump core on a corrupted
doc file.  Problem found by GCC 12 -Wanalyzer-null-argument.
---
 src/doc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/doc.c b/src/doc.c
index 71e66853b08..14db3189f34 100644
--- a/src/doc.c
+++ b/src/doc.c
@@ -569,6 +569,8 @@ the same file name is found in the `doc-directory'.  */)
       if (p)
 	{
 	  end = strchr (p, '\n');
+	  if (!end)
+	    error ("DOC file invalid at position %"pI"d", pos);
 
 	  /* We used to skip files not in build_files, so that when a
 	     function was defined several times in different files
-- 
2.39.2