fix ffi.nullptr #2

Signed-off-by: Jianhui Zhao <[email protected]>
zhaojh329 · Jan 16, 2025 · 6d6ac43 · 6d6ac43
1 parent e826b2e
commit 6d6ac43
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Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/ffi.c b/ffi.c
@@ -417,6 +417,7 @@ static struct ctype *ctype_new(lua_State *L, bool keep)
     struct ctype *ct = lua_newuserdata(L, sizeof(struct ctype));
 
     ct->type = CTYPE_VOID;
+    ct->ft = &ffi_type_void;
     ct->is_const = false;
 
     luaL_getmetatable(L, CTYPE_MT);
@@ -2469,8 +2470,16 @@ static void createmetatable(lua_State *L, const char *name, const struct luaL_Re
 
 static void create_nullptr(lua_State *L)
 {
-    struct ctype *ct = ctype_new(L, false);
-    ctype_to_ptr(L, ct);
+    struct ctype match = {
+        .type = CTYPE_VOID,
+        .ft = &ffi_type_void
+    };
+    struct ctype *ct;
+
+    ctype_to_ptr(L, &match);
+
+    ct = ctype_lookup(L, &match, false);
+
     cdata_ptr_set(cdata_new(L, ct, NULL), NULL);
 }
 

diff --git a/tests/test.lua b/tests/test.lua
@@ -43,6 +43,9 @@ ffi.cdef([[
 ]])
 
 local tests = {
+    function()
+        print(ffi.nullptr)
+    end,
     function()
         local a = ffi.new('int [10]', {1, 2, 3})
         assert(a[0] == 1)