From 580ed1ec6d356d59b222d5c18868e88f642b61e7 Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Fri, 29 Sep 2017 22:14:35 +0200
Subject: [PATCH] Avoid a segfault that happens on first use of LEF/DEF reader.

---
 src/ext/ext/extLEFDEFPlugin.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ext/ext/extLEFDEFPlugin.cc b/src/ext/ext/extLEFDEFPlugin.cc
index dc2c2a78d..2c465aeb9 100644
--- a/src/ext/ext/extLEFDEFPlugin.cc
+++ b/src/ext/ext/extLEFDEFPlugin.cc
@@ -126,6 +126,10 @@ private:
   const db::LayerMap &read_lefdef (db::Layout &layout, const db::LoadLayoutOptions &options, bool import_lef) throw (tl::Exception)
   {
     const ext::LEFDEFReaderOptions *lefdef_options = dynamic_cast<const ext::LEFDEFReaderOptions *> (options.get_options (format ()));
+    static ext::LEFDEFReaderOptions default_options;
+    if (! lefdef_options) {
+      lefdef_options = &default_options;
+    }
 
     //  Take the layer map and the "read all layers" flag from the reader options - hence we override the
     ext::LEFDEFLayerDelegate layers (lefdef_options);