patch 8.0.1819: swap file warning for file with non-existing directory commit https://github.com/vim/vim/commit/8c3169c58eef3e04f643fe9e045a97b81429e0cb Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 12 17:04:12 2018 +0200 patch 8.0.1819: swap file warning for file with non-existing directory Problem: Swap file warning for a file in a non-existing directory, if there is another with the same file name. (Juergen Weigert) Solution: When expanding the file name fails compare the file names.

--- a/src/testdir/test_swap.vim
+++ b/src/testdir/test_swap.vim
@@ -82,3 +82,18 @@ func Test_swap_group()
     call delete('Xtest')
   endtry
 endfunc
+
+func Test_missing_dir()
+  call mkdir('Xswapdir')
+  exe 'set directory=' . getcwd() . '/Xswapdir'
+
+  call assert_equal('', glob('foo'))
+  call assert_equal('', glob('bar'))
+  edit foo/x.txt
+  " This should not give a warning for an existing swap file.
+  split bar/x.txt
+  only
+
+  set directory&
+  call delete('Xswapdir', 'rf')
+endfunc