From 68fcc03d5c6eea4d71679197c80dfaff6f0781bf Mon Sep 17 00:00:00 2001
From: Willi Ballenthin <willi.ballenthin@gmail.com>
Date: Thu, 25 Feb 2021 13:34:59 -0700
Subject: [PATCH] viv: ignore empty branch targets

but what does this really mean? why would `getBranches` return `None`?

closes #441
---
 capa/features/extractors/viv/insn.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/capa/features/extractors/viv/insn.py b/capa/features/extractors/viv/insn.py
index e708ee47..addc7551 100644
--- a/capa/features/extractors/viv/insn.py
+++ b/capa/features/extractors/viv/insn.py
@@ -499,6 +499,9 @@ def extract_insn_cross_section_cflow(f, bb, insn):
     inspect the instruction for a CALL or JMP that crosses section boundaries.
     """
     for va, flags in insn.getBranches():
+        if va is None:
+            continue
+
         if flags & envi.BR_FALL:
             continue