From 155f19a6d8cc6fffb5c39b26b5c4c24f113416b5 Mon Sep 17 00:00:00 2001
From: Tim Edwards <tim@opencircuitdesign.com>
Date: Sun, 4 Aug 2024 11:37:54 -0400
Subject: [PATCH] Corrected an issue causing a crash condition when using
 "extract unique" on a flattened layout (some labels end up NULL and the NULL
 condition needs to be checked).  Also remembered to update VERSION, which was
 missed on the last commit.

---
 VERSION             | 2 +-
 extract/ExtUnique.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/VERSION b/VERSION
index 5c84de62..7659510c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.486
+8.3.487
diff --git a/extract/ExtUnique.c b/extract/ExtUnique.c
index 05645a3e..2e2a716c 100644
--- a/extract/ExtUnique.c
+++ b/extract/ExtUnique.c
@@ -164,7 +164,8 @@ extUniqueCell(def, option)
 
 		if (!(ll->ll_label->lab_flags & PORT_DIR_MASK))
 		    for (lltest = lastreg->lreg_labels; lltest; lltest = lltest->ll_next)
-			if (!strcmp(lltest->ll_label->lab_text, text))
+			if ((lltest->ll_label != NULL) &&
+					(!strcmp(lltest->ll_label->lab_text, text)))
 			    if (lltest->ll_label->lab_flags & PORT_DIR_MASK)
 				break;