Updated plugins

sources_non_forked/ale/ale_linters/c/gcc.vim

@@ -9,7 +9,11 @@ function! ale_linters#c#gcc#GetCommand(buffer, output) abort
 
     " -iquote with the directory the file is in makes #include work for
     "  headers in the same directory.
-    return '%e -S -x c -fsyntax-only'
+    "
+    " `-o /dev/null` or `-o null` is needed to catch all errors,
+    " -fsyntax-only doesn't catch everything.
+    return '%e -S -x c'
+    \   . ' -o ' . g:ale#util#nul_file
     \   . ' -iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
     \   . ale#Pad(l:cflags)
     \   . ale#Pad(ale#Var(a:buffer, 'c_gcc_options')) . ' -'