From b4947d67a4ebd48ca0105d44f92e47f044e51600 Mon Sep 17 00:00:00 2001
From: John Ellson <ellson@research.att.com>
Date: Thu, 9 Apr 2020 16:11:58 -0400
Subject: [PATCH] applying RH's graphviz-2.42.2-coverity-scan-fixes.patch

---
 cmd/lefty/dot2l/dotlex.c | 2 +-
 cmd/tools/gvgen.c        | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmd/lefty/dot2l/dotlex.c b/cmd/lefty/dot2l/dotlex.c
index cf738c0c7..65e17e246 100644
--- a/cmd/lefty/dot2l/dotlex.c
+++ b/cmd/lefty/dot2l/dotlex.c
@@ -252,7 +252,7 @@ static char *scan_token (char *p) {
     char *q;
 
     q = lexbuf;
-    if (p == '\0')
+    if (!p || *p == '\0')
         return NULL;
     while (isalnum (*p) || (*p == '_') || (!isascii (*p)))
         *q++ = *p++;
diff --git a/cmd/tools/gvgen.c b/cmd/tools/gvgen.c
index c2b166d44..c9a51e9cf 100644
--- a/cmd/tools/gvgen.c
+++ b/cmd/tools/gvgen.c
@@ -453,6 +453,8 @@ closeOpen (void)
 	fprintf(opts.outfile, "}\ngraph {\n");
 }
 
+extern void makeTetrix(int depth, edgefn ef);
+
 int main(int argc, char *argv[])
 {
     GraphType graphType;
-- 
2.40.0