From f9267417fa139322069dab2de06918d095cef449 Mon Sep 17 00:00:00 2001
From: Chris White <cxwembedded@gmail.com>
Date: Sat, 10 Dec 2022 14:12:04 -0500
Subject: [PATCH] find-file-doc-comments.pl: die on non-existent input files
 [minor]

---
 find-file-doc-comments.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/find-file-doc-comments.pl b/find-file-doc-comments.pl
index e14028f..bb46662 100755
--- a/find-file-doc-comments.pl
+++ b/find-file-doc-comments.pl
@@ -32,6 +32,7 @@ exit main(@ARGV);
 sub main {
     die "Need a filename" unless @_;
     my $filename = shift;
+    die "Could not read $filename" unless -r $filename;
     say "Processing file $filename" if $VERBOSE;
 
     # Fatalize all warnings, and log which file triggered the warning.