Use get() to get value of LanguageClient_isServerRunning
@@ -1520,7 +1520,7 @@ function! LanguageClient#serverStatusMessage() abort
endfunction
function! LanguageClient#isServerRunning() abort
- return b:LanguageClient_isServerRunning
+ return get(b:, 'LanguageClient_isServerRunning', 0)
endfunction
" Example function usable for status line.
