From ab1dc3b8048938d679e369185534ccfeaeef034f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ana=20Mar=C3=ADa=20Mart=C3=ADnez=20G=C3=B3mez?=
 <anamaria.martinezgom@FireEye.com>
Date: Fri, 17 Jul 2020 14:01:07 +0200
Subject: [PATCH] Fix rule linter

Prevent the linter to raise an exception if `examples` is `None`, as it
for example currently happens in:
`capa-rules/nursery/hash-data-using-murmur2.yml`

We could also remove the `examples` tag in those cases, but the linter
shouldn't break in any case.
---
 scripts/lint.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/scripts/lint.py b/scripts/lint.py
index 3a017d0f..ada15a9d 100644
--- a/scripts/lint.py
+++ b/scripts/lint.py
@@ -136,10 +136,12 @@ class MissingExampleOffset(Lint):
 
     def check_rule(self, ctx, rule):
         if rule.meta.get("scope") in ("function", "basic block"):
-            for example in rule.meta.get("examples", []):
-                if example and ":" not in example:
-                    logger.debug("example: %s", example)
-                    return True
+            examples = rule.meta.get("examples")
+            if isinstance(examples, list):
+                for example in examples:
+                    if example and ":" not in example:
+                        logger.debug("example: %s", example)
+                        return True
 
 
 class ExampleFileDNE(Lint):