From 8d95a3002bef79b4799f1d39f9518afba1b00365 Mon Sep 17 00:00:00 2001
From: Tim Edwards <tim@opencircuitdesign.com>
Date: Wed, 21 Feb 2018 10:02:23 -0500
Subject: [PATCH] Corrected an error in LEF write that will cause a segfault if
 a label is attached to space.

---
 lef/lefWrite.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lef/lefWrite.c b/lef/lefWrite.c
index bf7ee14c..b6453d45 100644
--- a/lef/lefWrite.c
+++ b/lef/lefWrite.c
@@ -911,6 +911,10 @@ lefWriteMacro(def, f, scale)
 
 	// TTMaskSetOnlyType(&lmask, lab->lab_type);
 
+        // Avoid errors caused by labels attached to space or
+	// various technology file issues.
+	TTMaskClearType(&lc.rmask, TT_SPACE);
+
 	ttype = TT_SPACE;
 	scx.scx_area = labr;
 	SelectClear();