From 731a2b3a344764b5a5a709b2279a39c3682ceea7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@riseup.net>
Date: Mon, 4 Nov 2019 21:17:29 +0100
Subject: [PATCH] Fix uninitialized global variable warning

In particular,

```
 warning: global variable `$thor_runner' not initialized
```
---
 lib/thor.rb                |  1 +
 spec/fixtures/verbose.thor | 10 ++++++++++
 spec/no_warnings_spec.rb   | 10 ++++++++++
 3 files changed, 21 insertions(+)
 create mode 100644 spec/fixtures/verbose.thor
 create mode 100644 spec/no_warnings_spec.rb

diff --git a/lib/thor.rb b/lib/thor.rb
index e77f53857..19a245b84 100644
--- a/lib/thor.rb
+++ b/lib/thor.rb
@@ -398,6 +398,7 @@ def dispatch(meth, given_args, given_opts, config) #:nodoc: # rubocop:disable Me
     # the namespace should be displayed as arguments.
     #
     def banner(command, namespace = nil, subcommand = false)
+      $thor_runner ||= false
       command.formatted_usage(self, $thor_runner, subcommand).split("\n").map do |formatted_usage|
         "#{basename} #{formatted_usage}"
       end.join("\n")
diff --git a/spec/fixtures/verbose.thor b/spec/fixtures/verbose.thor
new file mode 100644
index 000000000..f7f1f367f
--- /dev/null
+++ b/spec/fixtures/verbose.thor
@@ -0,0 +1,10 @@
+#!/usr/bin/ruby
+
+$VERBOSE = true
+
+require 'thor'
+
+class Test < Thor
+end
+
+Test.start(ARGV)
diff --git a/spec/no_warnings_spec.rb b/spec/no_warnings_spec.rb
new file mode 100644
index 000000000..1ca6d6dfc
--- /dev/null
+++ b/spec/no_warnings_spec.rb
@@ -0,0 +1,10 @@
+require "open3"
+
+context "when $VERBOSE is enabled" do
+  it "prints no warnings" do
+    root = File.expand_path("..", __dir__)
+    _, err, _ = Open3.capture3("ruby -I #{root}/lib #{root}/spec/fixtures/verbose.thor")
+
+    expect(err).to be_empty
+  end
+end