vim-patch:8.0.0339: illegal memory access with vi' (#7794)

Problem:    Illegal memory access with vi'
Solution:   For quoted text objects bail out if the Visual area spans more
            than one line.

46522af724

src/nvim/search.c

@@ -3669,6 +3669,11 @@ current_quote (
 
   /* Correct cursor when 'selection' is exclusive */
   if (VIsual_active) {
+    // this only works within one line
+    if (VIsual.lnum != curwin->w_cursor.lnum) {
+        return false;
+    }
+
     vis_bef_curs = lt(VIsual, curwin->w_cursor);
     if (*p_sel == 'e' && vis_bef_curs)
       dec_cursor();

src/nvim/testdir/test_visual.vim

@@ -43,3 +43,10 @@ func Test_dotregister_paste()
   call assert_equal('hello world world', getline(1))
   q!
 endfunc
+
+func Test_Visual_inner_quote()
+  new
+  normal oxX
+  normal vki'
+  bwipe!
+endfunc