patch 8.2.4655: cmdline completion popup menu positioned wrong

Problem:    Command line completion popup menu positioned wrong when using a
            terminal window.
Solution:   Position the popup menu differently when editing the command line.
            (Yegappan Lakshmanan, closes #10050, closes #10035)
diff --git a/src/testdir/dumps/Test_wildmenu_pum_term_01.dump b/src/testdir/dumps/Test_wildmenu_pum_term_01.dump
new file mode 100644
index 0000000..b619875
--- /dev/null
+++ b/src/testdir/dumps/Test_wildmenu_pum_term_01.dump
@@ -0,0 +1,10 @@
+| +0&#ffffff0@74
+@75
+@75
+@5| +0#0000001#e0e0e08|d|e|f|i|n|e| @8| +0#0000000#ffffff0@53
+|<+2#ffffff16#00e0003|o|r|t| | +0#0000001#ffd7ff255|j|u|m|p| @10|w+2#ffffff16#00e0003|r|i|t|e|(|s|y|s|.|s|t|d|i|n|.|r|e|a|d|(|)@1|"| |[|r|u|n@1|i|n|g|]| @1|0|,|0|-|1| @9|A|l@1
+| +0#0000000#ffffff0@4| +0#0000001#ffd7ff255|l|i|s|t| @10| +0#0000000#ffffff0@53
+|~+0#4040ff13&| @3| +0#0000001#ffd7ff255|p|l|a|c|e| @9| +0#4040ff13#ffffff0@53
+|~| @3| +0#0000001#ffd7ff255|u|n|d|e|f|i|n|e| @6| +0#4040ff13#ffffff0@53
+|[+1#0000000&|N|o| |N| +0#0000001#ffd7ff255|u|n|p|l|a|c|e| @7| +1#0000000#ffffff0@35|0|,|0|-|1| @9|A|l@1
+|:+0&&|s|i|g|n| |d|e|f|i|n|e> @62
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index f2b03de..e38a569 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -2510,6 +2510,30 @@
   cunmap <F2>
 endfunc
 
+" Test for opening the cmdline completion popup menu from the terminal window.
+" The popup menu should be positioned correctly over the status line of the
+" bottom-most window.
+func Test_wildmenu_pum_from_terminal()
+  CheckRunVimInTerminal
+  let python = PythonProg()
+  call CheckPython(python)
+
+  %bw!
+  let cmds = ['set wildmenu wildoptions=pum']
+  let pcmd = python .. ' -c "import sys; sys.stdout.write(sys.stdin.read())"'
+  call add(cmds, "call term_start('" .. pcmd .. "')")
+  call writefile(cmds, 'Xtest')
+  let buf = RunVimInTerminal('-S Xtest', #{rows: 10})
+  call term_sendkeys(buf, "\r\r\r")
+  call term_wait(buf)
+  call term_sendkeys(buf, "\<C-W>:sign \<Tab>")
+  call term_wait(buf)
+  call VerifyScreenDump(buf, 'Test_wildmenu_pum_term_01', {})
+  call term_wait(buf)
+  call StopVimInTerminal(buf)
+  call delete('Xtest')
+endfunc
+
 " Test for completion after a :substitute command followed by a pipe (|)
 " character
 func Test_cmdline_complete_substitute()
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 8e75258..f290eff 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -935,7 +935,7 @@
   tunmap 123
   tunmap 456
   call assert_equal('', maparg('123', 't'))
-  close
+  exe buf . 'bwipe'
   unlet g:job
 endfunc