patch 8.1.0672: the Lua interface doesn't know about v:null
Problem: The Lua interface doesn't know about v:null.
Solution: Add Lua support for v:null. (Uji, closes #3744)
diff --git a/src/if_lua.c b/src/if_lua.c
index 6e33734..9400e3a 100644
--- a/src/if_lua.c
+++ b/src/if_lua.c
@@ -562,6 +562,10 @@
tv->v_type = VAR_SPECIAL;
tv->vval.v_number = (varnumber_T) lua_toboolean(L, pos);
break;
+ case LUA_TNIL:
+ tv->v_type = VAR_SPECIAL;
+ tv->vval.v_number = VVAL_NULL;
+ break;
case LUA_TSTRING:
tv->v_type = VAR_STRING;
tv->vval.v_string = vim_strsave((char_u *) lua_tostring(L, pos));