From 029df375f58a9f87150c5f4dcc3dad995cf17934 Mon Sep 17 00:00:00 2001
From: JunghwanNA <70629228+shaun0927@users.noreply.github.com>
Date: Thu, 16 Apr 2026 12:27:10 +0900
Subject: [PATCH] fix(test): break on unknown signal in count_concat_bits

When an unknown signal is encountered, total is set to -1 but the
loop continues. Subsequent known signals add their widths to -1,
producing incorrect totals (e.g. -1 + 16 = 15 instead of -1).
This can mask genuine truncation bugs in status word packing.
---
 9_Firmware/tests/cross_layer/contract_parser.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/9_Firmware/tests/cross_layer/contract_parser.py b/9_Firmware/tests/cross_layer/contract_parser.py
index a0220ff..fa2b17f 100644
--- a/9_Firmware/tests/cross_layer/contract_parser.py
+++ b/9_Firmware/tests/cross_layer/contract_parser.py
@@ -497,6 +497,7 @@ def count_concat_bits(concat_expr: str, port_widths: dict[str, int]) -> ConcatWi
             # Unknown width — flag it
             fragments.append((part, -1))
             total = -1  # Can't compute
+            break
 
     return ConcatWidth(
         total_bits=total,