diff --git a/port/linux/push-core.sh b/port/linux/push-core.sh
index 82a1d2cb0..1102ecd7f 100644
--- a/port/linux/push-core.sh
+++ b/port/linux/push-core.sh
@@ -5,7 +5,7 @@ FLAG_NOTE="\033[35m[Note]\033[0m"
 
 cp package/pikascript/pikascript-core/* ../../src -r
 cp package/pikascript/PikaObj.pyi ../../src
-git add test/python/*.py
+git add ../../test/python/*.py
 sh std_push.sh PikaStdLib
 sh std_push.sh PikaStdData
 sh std_push.sh PikaDebug
diff --git a/src/PikaVM.c b/src/PikaVM.c
index ac5e61ea0..ed9c58f90 100644
--- a/src/PikaVM.c
+++ b/src/PikaVM.c
@@ -1489,8 +1489,10 @@ static Arg* VM_instruction_handler_OUT(PikaObj* self,
     }
 
     host_obj = obj_getHostObjWithIsTemp(context, arg_path, &is_temp);
-    if (_proxy_setattr(host_obj, arg_name, out_arg)) {
-        return NULL;
+    if (host_obj != NULL) {
+        if (_proxy_setattr(host_obj, arg_name, out_arg)) {
+            return NULL;
+        }
     }
 
     obj_setArg_noCopy(context, arg_path, out_arg);
diff --git a/test/module-test.cpp b/test/module-test.cpp
index 9d027a08a..9fb0f3876 100644
--- a/test/module-test.cpp
+++ b/test/module-test.cpp
@@ -352,4 +352,20 @@ TEST(proxy, test1) {
     EXPECT_EQ(pikaMemNow(), 0);
 }
 
+TEST(issue, global) {
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj("pikaMain", New_PikaMain);
+    extern unsigned char pikaModules_py_a[];
+    obj_linkLibrary(pikaMain, pikaModules_py_a);
+    /* run */
+    __platform_printf("BEGIN\r\n");
+    pikaVM_runSingleFile(pikaMain, "test/python/issue/issue_global.py");
+    /* collect */
+    /* assert */
+    /* deinit */
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+
 #endif
\ No newline at end of file
diff --git a/test/python/issue/issue_global.py b/test/python/issue/issue_global.py
new file mode 100644
index 000000000..c6538f772
--- /dev/null
+++ b/test/python/issue/issue_global.py
@@ -0,0 +1,57 @@
+
+class Test:
+    def __init__(self):
+        self.timer1_flag = 0
+        self.timer2_flag = 0
+        self.timer3_flag = 0
+
+    def get_timer1_flag(self) -> int:
+        return self.timer1_flag
+
+    def set_timer1_flag(self, flag):
+        self.timer1_flag = flag
+
+    def fun1(self, name):
+        self.timer1_flag = 1
+        print("fun1", name)
+
+    def fun2(self, name):
+        #self.timer2_flag = 1
+        print("fun2", name)
+        print('self.timer2_flag = ', self.timer2_flag)
+
+    def fun3(self, name):
+        self.timer3_flag = 1
+        print("fun3", name)
+
+
+def callBack1(signal):
+    print("signal", signal)
+    testpara.fun1("callBack1")
+    print(testpara.timer1_flag)
+
+
+def callBack2(signal):
+    print("signal", signal)
+    #global testpara
+    # global testpara.timer2_flag
+    testpara.timer2_flag += 1
+    testpara.fun2("callBack2")
+    print('testpara.timer2_flag = ', testpara.timer2_flag)
+
+
+def callBack3(signal):
+    print("signal", signal)
+    # global testpara
+    # testpara.timer3_flag = 1
+    testpara.fun3("callBack3")
+    print(testpara.timer3_flag)
+
+
+testpara = Test()
+testpara.fun1('fun1')
+testpara.fun2('fun2')
+testpara.fun3('fun3')
+callBack1(1)
+callBack2(2)
+callBack3(3)