added the test for #27508 and remove an uncessary printf

src/nvim/buffer.c

@@ -1853,7 +1853,6 @@ buf_T *buflist_new(char *ffname_arg, char *sfname_arg, linenr_T lnum, int flags)
   char *ffname = ffname_arg;
   char *sfname = sfname_arg;
   buf_T *buf;
-  printf("buflist_new\n");
 
   fname_expand(curbuf, &ffname, &sfname);       // will allocate ffname
 

test/functional/terminal/buffer_spec.lua

@@ -338,6 +338,28 @@ describe(':terminal buffer', function()
     eq(termbuf, eval('g:termbuf'))
   end)
 
+  it('deletes the current buffer when bufhidden=delete #27508', function()
+    local screen = Screen.new(50, 4)
+    screen:attach()
+    -- open a terminal buffer
+    command('terminal ls')
+    -- set bufhidden = delete
+    command('set bufhidden=delete')
+    -- open a new buffer
+    command('enew')
+    -- get the buffer list
+    command('ls')
+    -- verify the termnal buffer does not appear in the buffer list
+    screen:expect({
+      grid = [[
+                                                          |*2
+          0 %h   "[No Name]"                    line 1    |
+        Press ENTER or type command to continue^           |
+      ]],
+      attr_ids = {},
+    })
+  end)
+
   it('TermReqeust synchronization #27572', function()
     command('autocmd! nvim_terminal TermRequest')
     local term = exec_lua([[