From 304686431157a44db3e5c1437b9ff340a24d7cea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20F=C3=B6hring?= <rf@bamaru.de>
Date: Sat, 30 Jul 2022 21:40:24 +0200
Subject: [PATCH] Fix error on single-line modules

Refs #966
---
 lib/credo/priority.ex                            | 2 +-
 test/credo/check/readability/module_doc_test.exs | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/credo/priority.ex b/lib/credo/priority.ex
index bc1f0f6d6..856112c1a 100644
--- a/lib/credo/priority.ex
+++ b/lib/credo/priority.ex
@@ -78,7 +78,7 @@ defmodule Credo.Priority do
           |> Enum.slice(0..(length(names) - 2))
           |> Enum.join(".")
 
-        mod_prio = lookup[mod_name]
+        mod_prio = lookup[mod_name] || 0
 
         {scope_name, prio + mod_prio}
       else
diff --git a/test/credo/check/readability/module_doc_test.exs b/test/credo/check/readability/module_doc_test.exs
index 24e360067..e3dd548d5 100644
--- a/test/credo/check/readability/module_doc_test.exs
+++ b/test/credo/check/readability/module_doc_test.exs
@@ -93,4 +93,13 @@ defmodule Credo.Check.Readability.ModuleDocTest do
     |> run_check(@described_check)
     |> assert_issue()
   end
+
+  test "it should report slightly unexpected code" do
+    """
+    defmodule Person, do: def greet(), do: :howdy
+    """
+    |> to_source_file
+    |> run_check(@described_check)
+    |> assert_issue()
+  end
 end