diff --git a/.vscode/configurationCache.log b/.vscode/configurationCache.log
new file mode 100644
index 000000000..bab9054b3
--- /dev/null
+++ b/.vscode/configurationCache.log
@@ -0,0 +1 @@
+{"buildTargets":[],"launchTargets":[],"customConfigurationProvider":{"workspaceBrowse":{"browsePath":[],"compilerArgs":[]},"fileIndex":[]}}
\ No newline at end of file
diff --git a/.vscode/dryrun.log b/.vscode/dryrun.log
new file mode 100644
index 000000000..d3f7e004b
--- /dev/null
+++ b/.vscode/dryrun.log
@@ -0,0 +1,6 @@
+make --dry-run --always-make --keep-going --print-directory
+make: Entering directory '/root/pikascript'
+make: Leaving directory '/root/pikascript'
+ 
+make: *** No targets specified and no makefile found.  Stop.
+
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..65e1ec078
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "makefile.extensionOutputFolder": "./.vscode"
+}
\ No newline at end of file
diff --git a/.vscode/targets.log b/.vscode/targets.log
new file mode 100644
index 000000000..2d5746b09
--- /dev/null
+++ b/.vscode/targets.log
@@ -0,0 +1,210 @@
+make all --print-data-base --no-builtin-variables --no-builtin-rules --question
+make: *** No rule to make target 'all'.  Stop.
+
+# GNU Make 4.3
+# Built for x86_64-pc-linux-gnu
+# Copyright (C) 1988-2020 Free Software Foundation, Inc.
+# License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
+# This is free software: you are free to change and redistribute it.
+# There is NO WARRANTY, to the extent permitted by law.
+
+# Make data base, printed on Wed Aug 24 21:15:35 2022
+
+# Variables
+
+# environment
+REMOTE_CONTAINERS_SOCKETS = ["/tmp/vscode-ssh-auth-0cbbdc11027918311efe3bd284f60e72d4c31ea5.sock"]
+# environment
+LC_ALL = C
+# environment
+VSCODE_CWD = /root/.vscode-server/bin/e4503b30fc78200f846c62cf8091b76ff5547662
+# default
+MAKE_COMMAND := make
+# environment
+VSCODE_HANDLES_SIGPIPE = true
+# automatic
+@D = $(patsubst %/,%,$(dir $@))
+# environment
+VSCODE_HANDLES_UNCAUGHT_ERRORS = true
+# default
+.VARIABLES := 
+# environment
+PWD = /root/pikascript
+# automatic
+%D = $(patsubst %/,%,$(dir $%))
+# environment
+HOSTNAME = 438a9adb6812
+# automatic
+^D = $(patsubst %/,%,$(dir $^))
+# automatic
+%F = $(notdir $%)
+# environment
+LANG = C
+# default
+.LOADED := 
+# default
+.INCLUDE_DIRS = /usr/local/include /usr/include /usr/include
+# makefile
+MAKEFLAGS = pqrR
+# makefile
+CURDIR := /root/pikascript
+# environment
+APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL = 1
+# environment
+LESSOPEN = | /usr/bin/lesspipe %s
+# automatic
+*D = $(patsubst %/,%,$(dir $*))
+# environment
+MFLAGS = -pqrR
+# environment
+SSH_AUTH_SOCK = /tmp/vscode-ssh-auth-0cbbdc11027918311efe3bd284f60e72d4c31ea5.sock
+# default
+.SHELLFLAGS := -c
+# automatic
++D = $(patsubst %/,%,$(dir $+))
+# makefile
+MAKEFILE_LIST := 
+# automatic
+@F = $(notdir $@)
+# automatic
+?D = $(patsubst %/,%,$(dir $?))
+# automatic
+*F = $(notdir $*)
+# automatic
+<D = $(patsubst %/,%,$(dir $<))
+# environment
+VSCODE_NLS_CONFIG = {"locale":"zh-cn","availableLanguages":{"*":"zh-cn"},"_languagePackId":"cc0490d1397af23dc5bf44a96fe15dbb.zh-cn","_translationsConfigFile":"/root/.vscode-server/data/clp/cc0490d1397af23dc5bf44a96fe15dbb.zh-cn/tcf.json","_cacheRoot":"/root/.vscode-server/data/clp/cc0490d1397af23dc5bf44a96fe15dbb.zh-cn","_resolvedLanguagePackCoreLocation":"/root/.vscode-server/data/clp/cc0490d1397af23dc5bf44a96fe15dbb.zh-cn/e4503b30fc78200f846c62cf8091b76ff5547662","_corruptedFile":"/root/.vscode-server/data/clp/cc0490d1397af23dc5bf44a96fe15dbb.zh-cn/corrupted.info","_languagePackSupport":true}
+# default
+MAKE_HOST := x86_64-pc-linux-gnu
+# makefile
+SHELL = /bin/sh
+# default
+MAKECMDGOALS := all
+# environment
+SHLVL = 1
+# environment
+MAKELEVEL := 0
+# default
+MAKE = $(MAKE_COMMAND)
+# environment
+PATH = /root/.vscode-server/bin/e4503b30fc78200f846c62cf8091b76ff5547662/bin/remote-cli:/root/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+# default
+MAKEFILES := 
+# automatic
+^F = $(notdir $^)
+# environment
+REMOTE_CONTAINERS_IPC = /tmp/vscode-remote-containers-ipc-0cbbdc11027918311efe3bd284f60e72d4c31ea5.sock
+# environment
+LESSCLOSE = /usr/bin/lesspipe %s %s
+# environment
+REMOTE_CONTAINERS = true
+# automatic
+?F = $(notdir $?)
+# environment
+LS_COLORS = 
+# automatic
++F = $(notdir $+)
+# 'override' directive
+GNUMAKEFLAGS := 
+# environment
+BROWSER = /root/.vscode-server/bin/e4503b30fc78200f846c62cf8091b76ff5547662/bin/helpers/browser.sh
+# makefile
+.DEFAULT_GOAL := 
+# default
+MAKE_VERSION := 4.3
+# environment
+DEBUGINFOD_URLS = 
+# environment
+VSCODE_AGENT_FOLDER = /root/.vscode-server
+# environment
+_ = /usr/bin/cat
+# environment
+RUSTUP_DIST_SERVER = https://mirrors.ustc.edu.cn/rust-static
+# environment
+VSCODE_IPC_HOOK_CLI = /tmp/vscode-ipc-b1f18302-a396-4580-a229-16a9f05461ec.sock
+# environment
+RUSTUP_UPDATE_ROOT = https://mirrors.ustc.edu.cn/rust-static/rustup
+# environment
+VSCODE_AMD_ENTRYPOINT = vs/workbench/api/node/extensionHostProcess
+# environment
+HOME = /root
+# environment
+ELECTRON_RUN_AS_NODE = 1
+# default
+.RECIPEPREFIX := 
+# automatic
+<F = $(notdir $<)
+# default
+SUFFIXES := 
+# default
+.FEATURES := target-specific order-only second-expansion else-if shortest-stem undefine oneshell nocomment grouped-target extra-prereqs archives jobserver output-sync check-symlink load
+# variable set hash-table stats:
+# Load=63/1024=6%, Rehash=0, Collisions=1/90=1%
+
+# Pattern-specific Variable Values
+
+# No pattern-specific variable values.
+
+# Directories
+
+# . (device 250, inode 1246684): 23 files, no impossibilities.
+
+# 23 files, no impossibilities in 1 directories.
+
+# Implicit Rules
+
+# No implicit rules.
+
+# Files
+
+# Not a target:
+Makefile:
+#  Implicit rule search has been done.
+#  File does not exist.
+#  File has been updated.
+#  Failed to be updated.
+
+# Not a target:
+.DEFAULT:
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+
+# Not a target:
+all:
+#  Command line target.
+#  Implicit rule search has been done.
+#  File does not exist.
+#  File has not been updated.
+
+# Not a target:
+makefile:
+#  Implicit rule search has been done.
+#  File does not exist.
+#  File has been updated.
+#  Failed to be updated.
+
+# Not a target:
+GNUmakefile:
+#  Implicit rule search has been done.
+#  File does not exist.
+#  File has been updated.
+#  Failed to be updated.
+
+# files hash-table stats:
+# Load=6/1024=1%, Rehash=0, Collisions=0/15=0%
+# VPATH Search Paths
+
+# No 'vpath' search paths.
+
+# No general ('VPATH' variable) search path.
+
+# strcache buffers: 1 (0) / strings = 31 / storage = 273 B / avg = 8 B
+# current buf: size = 8162 B / used = 273 B / count = 31 / avg = 8 B
+
+# strcache performance: lookups = 34 / hit rate = 8%
+# hash-table stats:
+# Load=31/8192=0%, Rehash=0, Collisions=0/34=0%
+# Finished Make data base on Wed Aug 24 21:15:35 2022
+
+ 
diff --git a/port/linux/test/VM-test.cpp b/port/linux/test/VM-test.cpp
index 775568eb7..0126b9a35 100644
--- a/port/linux/test/VM-test.cpp
+++ b/port/linux/test/VM-test.cpp
@@ -1198,7 +1198,6 @@ TEST(VM, science_num) {
     EXPECT_EQ(pikaMemNow(), 0);
 }
 
-#if !PIKA_NANO_ENABLE
 TEST(VM, issue_I5OJQB) {
     char* line = "s = '\\\\'";
     PikaObj* self = newRootObj("root", New_PikaStdLib_SysObj);
@@ -1206,23 +1205,7 @@ TEST(VM, issue_I5OJQB) {
     /* collect */
     char* s = obj_getStr(self, "s");
     /* assert */
-    EXPECT_STREQ(log_buff[0], "1");
-    /* deinit */
-    obj_deinit(self);
-    EXPECT_EQ(pikaMemNow(), 0);
-}
-#endif
-
-TEST(vm, keyword_2) {
-    char* line =
-        "def test(a, b):\n"
-        "    print(a, b)\n"
-        "test(a=1, b= 2)";
-    PikaObj* self = newRootObj("root", New_PikaStdLib_SysObj);
-    obj_run(self, line);
-    /* collect */
-    /* assert */
-    EXPECT_STREQ(log_buff[0], "1 2\r\n");
+    EXPECT_STREQ(s, "\\");
     /* deinit */
     obj_deinit(self);
     EXPECT_EQ(pikaMemNow(), 0);
diff --git a/port/linux/test/parse-test.cpp b/port/linux/test/parse-test.cpp
index 9f75eddf8..b88cebe76 100644
--- a/port/linux/test/parse-test.cpp
+++ b/port/linux/test/parse-test.cpp
@@ -4000,23 +4000,3 @@ TEST(parser, issues_I5OJQB) {
     args_deinit(buffs);
     EXPECT_EQ(pikaMemNow(), 0);
 }
-
-
-TEST(parser, keyword1) {
-    pikaMemInfo.heapUsedMax = 0;
-    Args* buffs = New_strBuff();
-    char* lines = "test(a=1, b ='test')";
-    __platform_printf("%s\n", lines);
-    char* pikaAsm = Parser_linesToAsm(buffs, lines);
-    __platform_printf("%s", pikaAsm);
-    EXPECT_STREQ(pikaAsm,
-                 "B0\n"
-                 "1 NUM 1\n"
-                 "1 OUT a\n"
-                 "1 STR test\n"
-                 "1 OUT b\n"
-                 "0 RUN test\n"
-                 "B0\n");
-    args_deinit(buffs);
-    EXPECT_EQ(pikaMemNow(), 0);
-}
diff --git a/src/PikaVM.c b/src/PikaVM.c
index 6a2159a55..4c2b70447 100644
--- a/src/PikaVM.c
+++ b/src/PikaVM.c
@@ -69,12 +69,6 @@ static int VMState_getBlockDeepthNow(VMState* vm) {
     return instructUnit_getBlockDeepth(ins_unit);
 }
 
-static int VMState_getInvokeDeepthNow(VMState* vm) {
-    /* support run byteCode */
-    InstructUnit* ins_unit = VMState_getInstructNow(vm);
-    return instructUnit_getInvokeDeepth(ins_unit);
-}
-
 static char* VMState_getConstWithInstructUnit(VMState* vm,
                                               InstructUnit* ins_unit) {
     return constPool_getByOffset(&(vm->bytecode_frame->const_pool),
@@ -1091,18 +1085,10 @@ static Arg* VM_instruction_handler_OUT(PikaObj* self,
                                        char* data,
                                        Arg* arg_ret_reg) {
     arg_newReg(outArg_reg, PIKA_ARG_BUFF_SIZE);
-
     Arg* outArg = stack_popArg(&vm->stack, &outArg_reg);
     // Arg* outArg = stack_popArg_alloc(&vm->stack);
     ArgType outArg_type = arg_getType(outArg);
 
-    if (VMState_getInvokeDeepthNow(vm) > 0) {
-        /* in block, is a keyword arg */
-        arg_setIsKeyword(outArg, PIKA_TRUE);
-        arg_setName(outArg, data);
-        return arg_copy_noalloc(outArg, arg_ret_reg);
-    }
-
     if (_checkLReg(data)) {
         uint8_t index = _getLRegIndex(data);
         if (argType_isObject(outArg_type)) {
@@ -1210,7 +1196,8 @@ static Arg* VM_instruction_handler_JEZ(PikaObj* self,
                                        VMState* vm,
                                        char* data,
                                        Arg* arg_ret_reg) {
-    int thisBlockDeepth = VMState_getBlockDeepthNow(vm);
+    int thisBlockDeepth;
+    thisBlockDeepth = VMState_getBlockDeepthNow(vm);
     int jmp_expect = fast_atoi(data);
     arg_newReg(pika_assertArg_reg, PIKA_ARG_BUFF_SIZE);
     Arg* pika_assertArg = stack_popArg(&(vm->stack), &pika_assertArg_reg);
@@ -1248,9 +1235,6 @@ static uint8_t VMState_getInputArgNum(VMState* vm) {
             break;
         }
         if (invode_deepth == invoke_deepth_this + 1) {
-            if (instructUnit_getInstruct(ins_unit_now) == OUT) {
-                continue;
-            }
             num++;
         }
         if (instructUnit_getIsNewLine(ins_unit_now)) {
diff --git a/src/dataArg.h b/src/dataArg.h
index d2368353a..dc5f57407 100644
--- a/src/dataArg.h
+++ b/src/dataArg.h
@@ -61,12 +61,12 @@ typedef union {
     uint8_t* buffer;
 } _arg_union;
 struct Arg {
-    _arg_union _;       // 32/64 bit
-    uint32_t size;      // 32 bit
-    uint8_t type;       // 8 bit
-    uint32_t flag;      //
-    Hash name_hash;     // 32bit
-    uint8_t content[];  // n bit
+    _arg_union _;
+    uint32_t size;
+    uint8_t type;
+    PIKA_BOOL serialized;
+    Hash name_hash;
+    uint8_t content[];
 };
 
 Arg* arg_getNext(Arg* self);