vim-patch:8.2.2424: some tests are known to cause an error with ASAN

Problem:    Some tests are known to cause an error with ASAN.
Solution:   Add CheckNotAsan.
97202d9516

Move CheckNotMSWindows to the right place.
Omit test_memory_usage.vim: a Lua test is used for this file.

src/nvim/testdir/check.vim

@@ -55,6 +55,14 @@ func CheckMSWindows()
   endif
 endfunc
 
+" Command to check for NOT running on MS-Windows
+command CheckNotMSWindows call CheckNotMSWindows()
+func CheckNotMSWindows()
+  if has('win32')
+    throw 'Skipped: does not work on MS-Windows'
+  endif
+endfunc
+
 " Command to check for running on Unix
 command CheckUnix call CheckUnix()
 func CheckUnix()
@@ -129,14 +137,6 @@ func CheckEnglish()
   endif
 endfunc
 
-" Command to check for NOT running on MS-Windows
-command CheckNotMSWindows call CheckNotMSWindows()
-func CheckNotMSWindows()
-  if has('win32')
-    throw 'Skipped: does not work on MS-Windows'
-  endif
-endfunc
-
 " Command to check for not running under ASAN
 command CheckNotAsan call CheckNotAsan()
 func CheckNotAsan()

src/nvim/testdir/test_ex_mode.vim

@@ -191,6 +191,9 @@ func Test_ex_mode_errors()
 endfunc
 
 func Test_ex_mode_count_overflow()
+  " The multiplication causes an integer overflow
+  CheckNotAsan
+
   " this used to cause a crash
   let lines =<< trim END
     call feedkeys("\<Esc>gQ\<CR>")

src/nvim/testdir/test_ins_complete.vim

@@ -628,27 +628,33 @@ func Test_completefunc_error()
   call setline(1, ['', 'abcd', ''])
   call assert_fails('exe "normal 2G$a\<C-X>\<C-U>"', 'E565:')
 
-  " Jump to a different window from the complete function
-  " TODO: The following test causes an ASAN failure. Once this issue is
-  " addressed, enable the following test.
-  "func! CompleteFunc(findstart, base)
-  "  if a:findstart == 1
-  "    return col('.') - 1
-  "  endif
-  "  wincmd p
-  "  return ['a', 'b']
-  "endfunc
-  "set completefunc=CompleteFunc
-  "new
-  "call assert_fails('exe "normal a\<C-X>\<C-U>"', 'E839:')
-  "close!
-
   set completefunc&
   delfunc CompleteFunc
   delfunc CompleteFunc2
   close!
 endfunc
 
+func Test_completefunc_error_not_asan()
+  " The following test causes an ASAN failure.
+  CheckNotAsan
+
+  " Jump to a different window from the complete function
+  func! CompleteFunc(findstart, base)
+    if a:findstart == 1
+      return col('.') - 1
+    endif
+    wincmd p
+    return ['a', 'b']
+  endfunc
+  set completefunc=CompleteFunc
+  new
+  call assert_fails('exe "normal a\<C-X>\<C-U>"', 'E839:')
+  close!
+
+  set completefunc&
+  delfunc CompleteFunc
+endfunc
+
 " Test for returning non-string values from 'completefunc'
 func Test_completefunc_invalid_data()
   new