From 5060c73625b3e8a30b0d6dd6fdaf12e68b1fd773 Mon Sep 17 00:00:00 2001
From: Simon Schaak <9246423-sschaak@users.noreply.gitlab.com>
Date: Mon, 22 Nov 2021 16:48:05 +0100
Subject: [PATCH] Reject broken footprint files

Fixes https://gitlab.com/kicad/code/kicad/-/issues/9721
---
 pcbnew/footprint_libraries_utils.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pcbnew/footprint_libraries_utils.cpp b/pcbnew/footprint_libraries_utils.cpp
index 7b302820e6..aa23b8171a 100644
--- a/pcbnew/footprint_libraries_utils.cpp
+++ b/pcbnew/footprint_libraries_utils.cpp
@@ -115,6 +115,11 @@ static IO_MGR::PCB_FILE_T detect_file_type( FILE* aFile, const wxFileName& aFile
     reader.ReadLine();
     char* line = reader.Line();
 
+    if( !line )
+    {
+        return IO_MGR::FILE_TYPE_NONE;
+    }
+
     // first .kicad_mod file versions starts by "(module"
     // recent .kicad_mod file versions starts by "(footprint"
     if( strncasecmp( line, "(module", strlen( "(module" ) ) == 0