patch 9.0.0021: invalid memory access when adding word to spell word listv9.0.0021

Problem:    Invalid memory access when adding word with a control character to
            the internal spell word list.
Solution:   Disallow adding a word with control characters or a trailing
            slash.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/testdir/test_spell.vim b/src/testdir/test_spell.vim
index 0fd5ed9178..0187a175a8 100644
--- a/src/testdir/test_spell.vim
+++ b/src/testdir/test_spell.vim
@@ -854,6 +854,21 @@ func Test_spellsuggest_too_deep()
   bwipe!
 endfunc
 
+func Test_spell_good_word_invalid()
+  " This was adding a word with a 0x02 byte, which causes havoc.
+  enew
+  norm o0
+  sil! norm rzzWs00/
+  2
+  sil! norm VzGprzzW
+  sil! norm z=
+
+  bwipe!
+  " clear the internal word list
+  set enc=latin1
+  set enc=utf-8
+endfunc
+
 func LoadAffAndDic(aff_contents, dic_contents)
   set enc=latin1
   set spellfile=