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-rw-r--r--src/nvim/spellfile.c2
-rw-r--r--src/nvim/testdir/test_spell.vim9
2 files changed, 10 insertions, 1 deletions
diff --git a/src/nvim/spellfile.c b/src/nvim/spellfile.c
index 1f7f616782..df066e7ad3 100644
--- a/src/nvim/spellfile.c
+++ b/src/nvim/spellfile.c
@@ -3656,7 +3656,7 @@ static int spell_read_wordfile(spellinfo_T *spin, char_u *fname)
flags |= WF_REGION;
l = *p - '0';
- if (l > spin->si_region_count) {
+ if (l == 0 || l > spin->si_region_count) {
smsg(_("Invalid region nr in %s line %d: %s"),
fname, lnum, p);
break;
diff --git a/src/nvim/testdir/test_spell.vim b/src/nvim/testdir/test_spell.vim
index c7b4b60b6c..8165128fa3 100644
--- a/src/nvim/testdir/test_spell.vim
+++ b/src/nvim/testdir/test_spell.vim
@@ -272,6 +272,15 @@ func Test_zz_sal_and_addition()
call assert_equal("elekwint", SecondSpellWord())
endfunc
+func Test_region_error()
+ messages clear
+ call writefile(["/regions=usgbnz", "elequint/0"], "Xtest.latin1.add")
+ mkspell! Xtest.latin1.add.spl Xtest.latin1.add
+ call assert_match('Invalid region nr in Xtest.latin1.add line 2: 0', execute('messages'))
+ call delete('Xtest.latin1.add')
+ call delete('Xtest.latin1.add.spl')
+endfunc
+
" Check using z= in new buffer (crash fixed by patch 7.4a.028).
func Test_zeq_crash()
new