From 29746d492ef05a527c13cd1f835aaa9153eb8ff4 Mon Sep 17 00:00:00 2001
From: Gabriel Sobrinho <gabriel.sobrinho@gmail.com>
Date: Sat, 1 Jul 2017 11:18:21 -0300
Subject: [PATCH] Fix brakeman handler when there is no output

---
 ale_linters/ruby/brakeman.vim            | 4 ++++
 test/handler/test_brakeman_handler.vader | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/ale_linters/ruby/brakeman.vim b/ale_linters/ruby/brakeman.vim
index fa5617df..5ea531f1 100644
--- a/ale_linters/ruby/brakeman.vim
+++ b/ale_linters/ruby/brakeman.vim
@@ -5,6 +5,10 @@ let g:ale_ruby_brakeman_options =
 \   get(g:, 'ale_ruby_brakeman_options', '')
 
 function! ale_linters#ruby#brakeman#Handle(buffer, lines) abort
+    if len(a:lines) == 0
+        return []
+    endif
+
     let l:result = json_decode(join(a:lines, ''))
 
     let l:output = []
diff --git a/test/handler/test_brakeman_handler.vader b/test/handler/test_brakeman_handler.vader
index bc7182e3..6a577beb 100644
--- a/test/handler/test_brakeman_handler.vader
+++ b/test/handler/test_brakeman_handler.vader
@@ -73,3 +73,9 @@ Execute(The brakeman handler should parse JSON correctly):
   \    ']',
   \  '}'
   \  ])
+
+Execute(The brakeman handler should parse JSON correctly when there is no output from brakeman):
+  AssertEqual
+  \ [],
+  \ ale_linters#ruby#brakeman#Handle(347, [
+  \ ])