diff --git a/package/PikaStdLib/PikaStdData_Dict.c b/package/PikaStdLib/PikaStdData_Dict.c
index 0423fabfa..63447c256 100644
--- a/package/PikaStdLib/PikaStdData_Dict.c
+++ b/package/PikaStdLib/PikaStdData_Dict.c
@@ -40,7 +40,7 @@ Arg* PikaStdData_Dict___iter__(PikaObj* self) {
 Arg* PikaStdData_Dict___next__(PikaObj* self) {
     int __iter_i = args_getInt(self->list, "__iter_i");
     PikaDict* keys = obj_getPtr(self, "_keys");
-    Arg* res = arg_copy(args_getArgByidex(&keys->super, __iter_i));
+    Arg* res = arg_copy(args_getArgByIndex(&keys->super, __iter_i));
     if (NULL == res) {
         return arg_newNull();
     }
@@ -91,7 +91,7 @@ Arg* PikaStdData_dict_keys___next__(PikaObj* self) {
     int __iter_i = args_getInt(self->list, "__iter_i");
     PikaObj* dictptr = obj_getPtr(self, "dictptr");
     PikaDict* keys = obj_getPtr(dictptr, "_keys");
-    Arg* res = arg_copy(args_getArgByidex(&keys->super, __iter_i));
+    Arg* res = arg_copy(args_getArgByIndex(&keys->super, __iter_i));
     if (NULL == res) {
         return arg_newNull();
     }
@@ -107,7 +107,7 @@ char* PikaStdData_dict_keys___str__(PikaObj* self) {
 
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item = args_getArgByidex(&keys->super, i);
+        Arg* item = args_getArgByIndex(&keys->super, i);
         if (NULL == item) {
             break;
         }
@@ -141,8 +141,8 @@ char* PikaStdData_Dict___str__(PikaObj* self) {
 
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item_key = args_getArgByidex(&keys->super, i);
-        Arg* item_val = args_getArgByidex(&dict->super, i);
+        Arg* item_key = args_getArgByIndex(&keys->super, i);
+        Arg* item_val = args_getArgByIndex(&dict->super, i);
         if (NULL == item_key) {
             break;
         }
@@ -186,7 +186,7 @@ int PikaStdData_dict_keys___len__(PikaObj* self) {
 int dict_contains(PikaDict* dict, Arg* key) {
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item = args_getArgByidex(&dict->super, i);
+        Arg* item = args_getArgByIndex(&dict->super, i);
         if (NULL == item) {
             break;
         }
@@ -219,8 +219,8 @@ Arg* PikaStdData_dict_items___next__(PikaObj* self) {
     PikaObj* dictptr = obj_getPtr(self, "dictptr");
     PikaDict* keys = obj_getPtr(dictptr, "_keys");
     PikaDict* dict = obj_getPtr(dictptr, "dict");
-    Arg* key = args_getArgByidex(&keys->super, __iter_i);
-    Arg* val = args_getArgByidex(&dict->super, __iter_i);
+    Arg* key = args_getArgByIndex(&keys->super, __iter_i);
+    Arg* val = args_getArgByIndex(&dict->super, __iter_i);
     if (NULL == key) {
         return arg_newNull();
     }
diff --git a/port/linux/.vscode/launch.json b/port/linux/.vscode/launch.json
index 3e2d3067c..dae3e3925 100644
--- a/port/linux/.vscode/launch.json
+++ b/port/linux/.vscode/launch.json
@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/build/test/pikascript_test",
             // "program": "${workspaceFolder}/build/boot/demo06-pikamain/pikascript_demo06-pikamain",
             "args": [
-                // "--gtest_filter=parser.not_in"
+                // "--gtest_filter=vm.class_keyword"
             ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
diff --git a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdData_Dict.c b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdData_Dict.c
index 0423fabfa..63447c256 100644
--- a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdData_Dict.c
+++ b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdData_Dict.c
@@ -40,7 +40,7 @@ Arg* PikaStdData_Dict___iter__(PikaObj* self) {
 Arg* PikaStdData_Dict___next__(PikaObj* self) {
     int __iter_i = args_getInt(self->list, "__iter_i");
     PikaDict* keys = obj_getPtr(self, "_keys");
-    Arg* res = arg_copy(args_getArgByidex(&keys->super, __iter_i));
+    Arg* res = arg_copy(args_getArgByIndex(&keys->super, __iter_i));
     if (NULL == res) {
         return arg_newNull();
     }
@@ -91,7 +91,7 @@ Arg* PikaStdData_dict_keys___next__(PikaObj* self) {
     int __iter_i = args_getInt(self->list, "__iter_i");
     PikaObj* dictptr = obj_getPtr(self, "dictptr");
     PikaDict* keys = obj_getPtr(dictptr, "_keys");
-    Arg* res = arg_copy(args_getArgByidex(&keys->super, __iter_i));
+    Arg* res = arg_copy(args_getArgByIndex(&keys->super, __iter_i));
     if (NULL == res) {
         return arg_newNull();
     }
@@ -107,7 +107,7 @@ char* PikaStdData_dict_keys___str__(PikaObj* self) {
 
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item = args_getArgByidex(&keys->super, i);
+        Arg* item = args_getArgByIndex(&keys->super, i);
         if (NULL == item) {
             break;
         }
@@ -141,8 +141,8 @@ char* PikaStdData_Dict___str__(PikaObj* self) {
 
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item_key = args_getArgByidex(&keys->super, i);
-        Arg* item_val = args_getArgByidex(&dict->super, i);
+        Arg* item_key = args_getArgByIndex(&keys->super, i);
+        Arg* item_val = args_getArgByIndex(&dict->super, i);
         if (NULL == item_key) {
             break;
         }
@@ -186,7 +186,7 @@ int PikaStdData_dict_keys___len__(PikaObj* self) {
 int dict_contains(PikaDict* dict, Arg* key) {
     int i = 0;
     while (PIKA_TRUE) {
-        Arg* item = args_getArgByidex(&dict->super, i);
+        Arg* item = args_getArgByIndex(&dict->super, i);
         if (NULL == item) {
             break;
         }
@@ -219,8 +219,8 @@ Arg* PikaStdData_dict_items___next__(PikaObj* self) {
     PikaObj* dictptr = obj_getPtr(self, "dictptr");
     PikaDict* keys = obj_getPtr(dictptr, "_keys");
     PikaDict* dict = obj_getPtr(dictptr, "dict");
-    Arg* key = args_getArgByidex(&keys->super, __iter_i);
-    Arg* val = args_getArgByidex(&dict->super, __iter_i);
+    Arg* key = args_getArgByIndex(&keys->super, __iter_i);
+    Arg* val = args_getArgByIndex(&dict->super, __iter_i);
     if (NULL == key) {
         return arg_newNull();
     }
diff --git a/src/PikaVM.c b/src/PikaVM.c
index b7d86734c..521473573 100644
--- a/src/PikaVM.c
+++ b/src/PikaVM.c
@@ -1086,7 +1086,7 @@ static int _get_n_input_with_unpack(VMState* vm) {
             PikaDict* dict = obj_getPtr(obj, "dict");
             int i_item = 0;
             while (PIKA_TRUE) {
-                Arg* item_val = args_getArgByidex(&dict->super, i_item);
+                Arg* item_val = args_getArgByIndex(&dict->super, i_item);
                 if (NULL == item_val) {
                     break;
                 }
diff --git a/src/dataArgs.c b/src/dataArgs.c
index 04885be3b..64585c416 100644
--- a/src/dataArgs.c
+++ b/src/dataArgs.c
@@ -411,7 +411,7 @@ Arg* args_getArg(Args* self, char* name) {
     return (Arg*)node;
 }
 
-Arg* args_getArgByidex(Args* self, int index) {
+Arg* args_getArgByIndex(Args* self, int index) {
     pika_assert(NULL != self);
     LinkNode* nodeNow = self->firstNode;
     if (NULL == nodeNow) {
diff --git a/src/dataArgs.h b/src/dataArgs.h
index 81cb6d9de..47eb08afe 100644
--- a/src/dataArgs.h
+++ b/src/dataArgs.h
@@ -112,7 +112,7 @@ PIKA_RES args_foreach(Args* self,
 char* args_getBuff(Args* self, int32_t size);
 PIKA_RES args_pushArg(Args* self, Arg* arg);
 PIKA_RES args_pushArg_name(Args* self, char* name, Arg* arg);
-Arg* args_getArgByidex(Args* self, int index);
+Arg* args_getArgByIndex(Args* self, int index);
 void* args_getHeapStruct(Args* self, char* name);
 PIKA_RES args_removeArg_notDeinitArg(Args* self, Arg* argNow);
 uint8_t* args_getBytes(Args* self, char* name);
diff --git a/test/VM-test.cpp b/test/VM-test.cpp
index 2575ed4ae..97e5be1f2 100644
--- a/test/VM-test.cpp
+++ b/test/VM-test.cpp
@@ -2440,6 +2440,23 @@ TEST(vm, def_not_in) {
     EXPECT_EQ(pikaMemNow(), 0);
 }
 
+TEST(vm, fn_pos_kw_issue1) {
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj("pikaMain", New_PikaMain);
+    /* run */
+    __platform_printf("BEGIN\r\n");
+    obj_run(pikaMain,
+            "def new(a=1, b=2):\n"
+            "    print(a, b)\n"
+            "new(3, b = 2)\n");
+    /* collect */
+    /* assert */
+    /* deinit */
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+
 #endif
 
 TEST_END
\ No newline at end of file
diff --git a/test/args-test.cpp b/test/args-test.cpp
index a0914bd0a..17a02bb5e 100644
--- a/test/args-test.cpp
+++ b/test/args-test.cpp
@@ -169,8 +169,8 @@ TEST(args, index) {
     args_pushArg(args, arg_newInt(1));
     args_pushArg(args, arg_newFloat(2.4));
 
-    int a = arg_getInt(args_getArgByidex(args, 1));
-    float b = arg_getFloat(args_getArgByidex(args, 0));
+    int a = arg_getInt(args_getArgByIndex(args, 1));
+    float b = arg_getFloat(args_getArgByIndex(args, 0));
     /* assert */
     EXPECT_EQ(a, 1);
     EXPECT_FLOAT_EQ(b, 2.4);