From f527cb1a2d768cb48464048724172160c72f6a51 Mon Sep 17 00:00:00 2001
From: LCD 47 <lcd047@gmail.com>
Date: Mon, 29 Aug 2016 08:11:59 +0300
Subject: [PATCH] Core: fix check_on_open when starting with multiple files.

---
 plugin/syntastic.vim | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/plugin/syntastic.vim b/plugin/syntastic.vim
index d7ce2ffe..92e60e2b 100644
--- a/plugin/syntastic.vim
+++ b/plugin/syntastic.vim
@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.7.0-201'
+let g:_SYNTASTIC_VERSION = '3.7.0-202'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1
@@ -244,6 +244,7 @@ endfunction " }}}2
 
 augroup syntastic
     autocmd!
+    autocmd VimEnter * call s:VimEnterHook()
     autocmd BufEnter * call s:BufEnterHook(expand('<afile>', 1))
 augroup END
 
@@ -268,7 +269,7 @@ endif
 
 function! s:BufReadPostHook(fname) abort " {{{2
     let buf = syntastic#util#fname2buf(a:fname)
-    if g:syntastic_check_on_open
+    if g:syntastic_check_on_open && buf > 0
         call syntastic#log#debug(g:_SYNTASTIC_DEBUG_AUTOCOMMANDS,
             \ 'autocmd: BufReadPost, buffer ' . buf . ' = ' . string(a:fname))
         if index(s:_check_stack, buf) == -1
@@ -288,11 +289,13 @@ function! s:BufEnterHook(fname) abort " {{{2
     let buf = syntastic#util#fname2buf(a:fname)
     call syntastic#log#debug(g:_SYNTASTIC_DEBUG_AUTOCOMMANDS,
         \ 'autocmd: BufEnter, buffer ' . buf . ' = ' . string(a:fname) . ', &buftype = ' . string(&buftype))
-    if &buftype ==# ''
+    if buf > 0 && getbufvar(buf, '&buftype') ==# ''
         let idx = index(reverse(copy(s:_check_stack)), buf)
         if idx >= 0
-            call remove(s:_check_stack, -idx - 1)
-            call s:UpdateErrors(buf, 1, [])
+            if !has('vim_starting')
+                call remove(s:_check_stack, -idx - 1)
+                call s:UpdateErrors(buf, 1, [])
+            endif
         else
             call s:notifiers.refresh(g:SyntasticLoclist.current())
         endif
@@ -309,6 +312,17 @@ function! s:BufEnterHook(fname) abort " {{{2
     endif
 endfunction " }}}2
 
+function! s:VimEnterHook() abort " {{{2
+    let buf = bufnr('')
+    call syntastic#log#debug(g:_SYNTASTIC_DEBUG_AUTOCOMMANDS,
+        \ 'autocmd: VimEnter, buffer ' . buf . ' = ' . string(bufname(buf)) . ', &buftype = ' . string(&buftype))
+    let idx = index(reverse(copy(s:_check_stack)), buf)
+    if idx >= 0 && getbufvar(buf, '&buftype') ==# ''
+        call remove(s:_check_stack, -idx - 1)
+        call s:UpdateErrors(buf, 1, [])
+    endif
+endfunction " }}}2
+
 function! s:QuitPreHook(fname) abort " {{{2
     let buf = syntastic#util#fname2buf(a:fname)
     call syntastic#log#debug(g:_SYNTASTIC_DEBUG_AUTOCOMMANDS, 'autocmd: QuitPre, buffer ' . buf . ' = ' . string(a:fname))