From eb6c0bd719beda221c4cd4b8f19c65d0725b7bae Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 3 Sep 2025 09:44:38 +0000
Subject: [PATCH] Fix Binary Ninja MLIL None handling in extract_stackstring

Co-authored-by: williballenthin <156560+williballenthin@users.noreply.github.com>
---
 capa/features/extractors/binja/function.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/capa/features/extractors/binja/function.py b/capa/features/extractors/binja/function.py
index 707c572e..7e6a4b8b 100644
--- a/capa/features/extractors/binja/function.py
+++ b/capa/features/extractors/binja/function.py
@@ -197,6 +197,9 @@ def extract_stackstring(fh: FunctionHandle):
     except ILException:
         return
 
+    if mlil is None:
+        return
+
     for block in mlil.basic_blocks:
         if bb_contains_stackstring(func, block):
             yield Characteristic("stack string"), block.source_block.start