diff --git a/syntax_checkers/html/validator.vim b/syntax_checkers/html/validator.vim
index 04666354..745fa74b 100644
--- a/syntax_checkers/html/validator.vim
+++ b/syntax_checkers/html/validator.vim
@@ -52,24 +52,26 @@ function! SyntaxCheckers_html_validator_IsAvailable()
 endfunction
 
 function! SyntaxCheckers_html_validator_Preprocess(errors)
-    let out = copy(a:errors)
-    for n in range(len(out))
-        let parts = matchlist(out[n], '\v^"([^"]+)"(.+)')
-        " URL decode, except leave alone any "+"
-        let parts[1] = substitute(parts[1], '\m%\(\x\x\)', '\=nr2char("0x".submatch(1))', 'g')
-        let parts[1] = substitute(parts[1], '\\"', '"', 'g')
-        let parts[1] = substitute(parts[1], '\\\\', '\\', 'g')
-        let out[n] = '"' . parts[1] . '"' . parts[2]
+    let out = []
+    for e in a:errors
+        let parts = matchlist(e, '\v^"([^"]+)"(.+)')
+        if len(parts) >= 3
+            " URL decode, except leave alone any "+"
+            let parts[1] = substitute(parts[1], '\m%\(\x\x\)', '\=nr2char("0x".submatch(1))', 'g')
+            let parts[1] = substitute(parts[1], '\\"', '"', 'g')
+            let parts[1] = substitute(parts[1], '\\\\', '\\', 'g')
+            call add(out, '"' . parts[1] . '"' . parts[2])
+        endif
     endfor
     return out
 endfunction
 
 function! SyntaxCheckers_html_validator_GetLocList()
+    let fname = syntastic#util#shexpand('%')
     let makeprg = 'curl -s --compressed -F out=gnu -F asciiquotes=yes' .
         \ (!empty(g:syntastic_html_validator_parser) ? ' -F parser=' . g:syntastic_html_validator_parser : '') .
         \ (!empty(g:syntastic_html_validator_nsfilter) ? ' -F nsfilter=' . g:syntastic_html_validator_nsfilter : '') .
-        \ ' -F doc=@' . syntastic#util#shexpand('%') . '\;type=text/html\;filename=' . syntastic#util#shexpand('%') . ' ' .
-        \ g:syntastic_html_validator_api
+        \ ' -F doc=@' . fname . '\;type=text/html\;filename=' . fname . ' ' . g:syntastic_html_validator_api
 
     let errorformat =
         \ '%E"%f":%l: %trror: %m,' .