Fix #760 - Report problems with configuration files for rubocop

1 files changed, 12 insertions, 3 deletions

diff --git a/ale_linters/ruby/rubocop.vim b/ale_linters/ruby/rubocop.vim
index 5c1a60e7..9d315be1 100644
--- a/ale_linters/ruby/rubocop.vim
+++ b/ale_linters/ruby/rubocop.vim
@@ -14,11 +14,19 @@ function! ale_linters#ruby#rubocop#GetCommand(buffer) abort
 endfunction
 
 function! ale_linters#ruby#rubocop#Handle(buffer, lines) abort
-    if len(a:lines) == 0
-      return []
+    if empty(a:lines)
+        return []
     endif
 
-    let l:errors = json_decode(a:lines[0])
+    try
+        let l:errors = json_decode(a:lines[0])
+    catch
+        return [{
+        \   'lnum': 1,
+        \   'text': 'rubocop configuration error (type :ALEDetail for more information)',
+        \   'detail': join(a:lines, "\n"),
+        \}]
+    endtry
 
     let l:output = []
 
@@ -51,4 +59,5 @@ call ale#linter#Define('ruby', {
 \   'executable_callback': 'ale#handlers#rubocop#GetExecutable',
 \   'command_callback': 'ale_linters#ruby#rubocop#GetCommand',
 \   'callback': 'ale_linters#ruby#rubocop#Handle',
+\   'output_stream': 'both',
 \})