From 05d6a420f7644eef197aa33aa83f4f3dcd6dd246 Mon Sep 17 00:00:00 2001
From: Keith Rothman <537074+litghost@users.noreply.github.com>
Date: Mon, 5 Oct 2020 10:11:53 -0700
Subject: [PATCH] Add assertion to debug CI failure.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
---
 prjxray/tile_segbits.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/prjxray/tile_segbits.py b/prjxray/tile_segbits.py
index da7f232a..3715a1ad 100644
--- a/prjxray/tile_segbits.py
+++ b/prjxray/tile_segbits.py
@@ -46,7 +46,9 @@ def parsebit(val):
         isset = False
         val = val[1:]
     # 28_05 => 28, 05
-    seg_word_column, word_bit_n = val.split('_')
+    parts = val.split('_')
+    assert len(parts) == 2, val
+    seg_word_column, word_bit_n = parts
 
     return Bit(
         word_column=int(seg_word_column),