diff --git a/port/linux/.vscode/launch.json b/port/linux/.vscode/launch.json
index 2d69acfec..6f39a25d9 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=VM.Run_add"
+                "--gtest_filter=pikaMain.dump_issue_12l3kjioa"
             ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
diff --git a/port/linux/test/pikaMain-test.cpp b/port/linux/test/pikaMain-test.cpp
index 785038415..ecaf6d6b3 100644
--- a/port/linux/test/pikaMain-test.cpp
+++ b/port/linux/test/pikaMain-test.cpp
@@ -2512,3 +2512,38 @@ TEST(pikaMain, for_loop_issue_1b2a3f1bdf) {
     obj_deinit(pikaMain);
     EXPECT_EQ(pikaMemNow(), 0);
 }
+
+TEST(pikaMain, syantex_issue123lkjxi) {
+    char* lines =
+        "if i < 3\n";
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj("pikaMain", New_PikaMain);
+    /* run */
+    __platform_printf("BEGIN\r\n");
+    obj_run(pikaMain, lines);
+    /* collect */
+    /* assert */
+    /* deinit */
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+
+TEST(pikaMain, dump_issue_12l3kjioa) {
+    char* lines =
+        "if i = 1:\n"
+        "    print('test')\n"
+        "\n"
+        ;
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj("pikaMain", New_PikaMain);
+    /* run */
+    __platform_printf("BEGIN\r\n");
+    obj_run(pikaMain, lines);
+    /* collect */
+    /* assert */
+    /* deinit */
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
diff --git a/src/PikaParser.c b/src/PikaParser.c
index de1cadf19..3693d92db 100644
--- a/src/PikaParser.c
+++ b/src/PikaParser.c
@@ -163,6 +163,7 @@ char* strsPopTokenWithSkip_byStr(Args* outBuffs,
 }
 
 char* strsGetCleanCmd(Args* outBuffs, char* cmd) {
+    pika_assert(cmd!=NULL);
     int32_t size = strGetSize(cmd);
     /* lexer may generate more chars than input */
     char* strOut = args_getBuff(outBuffs, size * 2);
@@ -1860,6 +1861,11 @@ AST* AST_parseLine(char* line, Stack* block_stack) {
     }
 
 block_matched:
+    if (NULL == stmt){
+        AST_deinit(ast);
+        ast = NULL;
+        goto exit;
+    }
     stmt = strsGetCleanCmd(&buffs, stmt);
     ast = AST_parseStmt(ast, stmt);
     goto exit;
diff --git a/src/PikaVM.c b/src/PikaVM.c
index 4bd4f4b5e..d3e6a36a1 100644
--- a/src/PikaVM.c
+++ b/src/PikaVM.c
@@ -1167,7 +1167,10 @@ static Arg* VM_instruction_handler_JEZ(PikaObj* self,
     int jmp_expect = fast_atoi(data);
     arg_newReg(pika_assertArg_reg, PIKA_ARG_BUFF_SIZE);
     Arg* pika_assertArg = stack_popArg(&(vs->stack), &pika_assertArg_reg);
-    int pika_assert = arg_getInt(pika_assertArg);
+    int pika_assert = 0;
+    if (NULL != pika_assertArg) {
+        pika_assert = arg_getInt(pika_assertArg);
+    }
     arg_deinit(pika_assertArg);
     vs->ireg[thisBlockDeepth] = !pika_assert;
 
diff --git a/src/dataArg.c b/src/dataArg.c
index 0b43d90c6..c0921fcf7 100644
--- a/src/dataArg.c
+++ b/src/dataArg.c
@@ -269,6 +269,7 @@ Arg* arg_setStr(Arg* self, char* name, char* string) {
 }
 
 int64_t arg_getInt(Arg* self) {
+    pika_assert(NULL!=self);
     if (NULL == arg_getContent(self)) {
         return -999999;
     }
@@ -327,7 +328,7 @@ Arg* arg_copy_noalloc(Arg* arg_src, Arg* arg_dict) {
     if (NULL == arg_src) {
         return NULL;
     }
-    if (NULL == arg_dict){
+    if (NULL == arg_dict) {
         return arg_copy(arg_src);
     }
     /* size is too big to be copied by noalloc */