patch 8.2.1770: invalid memory use when using SpellFileMissing autocmdv8.2.1770

Problem:    Invalid memory use when using SpellFileMissing autocmd.
Solution:   Add test case. (Dominique Pellé, closes #7036)  Fix using a window
            that was closed.

3 files changed, 26 insertions, 1 deletions

diff --git a/src/spell.c b/src/spell.c
index 6b431fa5bf..085f3177cb 100644
--- a/src/spell.c
+++ b/src/spell.c
@@ -2280,11 +2280,11 @@ did_set_spelllang(win_T *wp)
 		}
 	    }
     }
+    redraw_win_later(wp, NOT_VALID);
 
 theend:
     vim_free(spl_copy);
     recursive = FALSE;
-    redraw_win_later(wp, NOT_VALID);
     return ret_msg;
 }
 
diff --git a/src/testdir/test_spell.vim b/src/testdir/test_spell.vim
index db40cd24a6..dd68e0c090 100644
--- a/src/testdir/test_spell.vim
+++ b/src/testdir/test_spell.vim
@@ -120,6 +120,29 @@ foobar/?
   set spell&
 endfunc
 
+func Test_spell_file_missing()
+  let s:spell_file_missing = 0
+  augroup TestSpellFileMissing
+    autocmd! SpellFileMissing * let s:spell_file_missing += 1
+  augroup END
+
+  set spell spelllang=ab_cd
+  let messages = GetMessages()
+  call assert_equal('Warning: Cannot find word list "ab.utf-8.spl" or "ab.ascii.spl"', messages[-1])
+  call assert_equal(1, s:spell_file_missing)
+
+  new XTestSpellFileMissing
+  augroup TestSpellFileMissing
+    autocmd! SpellFileMissing * bwipe
+  augroup END
+  call assert_fails('set spell spelllang=ab_cd', 'E797:')
+
+  augroup! TestSpellFileMissing
+  unlet s:spell_file_missing
+  set spell& spelllang&
+  %bwipe!
+endfunc
+
 func Test_spelllang_inv_region()
   set spell spelllang=en_xx
   let messages = GetMessages()
diff --git a/src/version.c b/src/version.c
index 3d37c85bcf..26e63c2bd2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1770,
+/**/
     1769,
 /**/
     1768,