diff --git a/src/parser/WASMParser.cpp b/src/parser/WASMParser.cpp
index 69a9b0ac4..08152d5ef 100644
--- a/src/parser/WASMParser.cpp
+++ b/src/parser/WASMParser.cpp
@@ -535,9 +535,9 @@ class WASMBinaryReader : public wabt::WASMBinaryReaderDelegate {
 
         m_vmStack.push_back(VMStackInfo(*this, type, pos, m_functionStackSizeSoFar, localIndex));
         size_t allocSize = Walrus::valueStackAllocatedSize(type);
-        if (UNLIKELY(m_functionStackSizeSoFar + allocSize > std::numeric_limits<Walrus::ByteCodeStackOffset>::max())) {
-            throw std::string("too many stack usage. we could not support this(yet).");
-        }
+        // FIXME too many stack usage. we could not support this(yet)
+        ASSERT(m_functionStackSizeSoFar + allocSize <= std::numeric_limits<Walrus::ByteCodeStackOffset>::max());
+
         m_functionStackSizeSoFar += allocSize;
         m_currentFunction->m_requiredStackSize = std::max(
             m_currentFunction->m_requiredStackSize, m_functionStackSizeSoFar);
@@ -545,6 +545,10 @@ class WASMBinaryReader : public wabt::WASMBinaryReaderDelegate {
 
     VMStackInfo popVMStackInfo()
     {
+        // FIXME This error can occur during the parsing process because of invalid wasm instructions
+        // e.g. a function with no end opcode
+        ASSERT(m_vmStack.size() > 0);
+
         auto info = m_vmStack.back();
         m_functionStackSizeSoFar -= Walrus::valueStackAllocatedSize(info.valueType());
         m_vmStack.pop_back();
@@ -567,24 +571,27 @@ class WASMBinaryReader : public wabt::WASMBinaryReaderDelegate {
         return info;
     }
 
-    size_t popVMStack()
+    VMStackInfo& peekVMStackInfo()
     {
-        return popVMStackInfo().position();
+        // FIXME This error can occur during the parsing process because of invalid wasm instructions
+        // e.g. a function with no end opcode
+        ASSERT(m_vmStack.size() > 0);
+        return m_vmStack.back();
     }
 
-    size_t peekVMStack()
+    size_t popVMStack()
     {
-        return m_vmStack.back().position();
+        return popVMStackInfo().position();
     }
 
-    VMStackInfo& peekVMStackInfo()
+    size_t peekVMStack()
     {
-        return m_vmStack.back();
+        return peekVMStackInfo().position();
     }
 
     Walrus::Value::Type peekVMStackValueType()
     {
-        return m_vmStack.back().valueType();
+        return peekVMStackInfo().valueType();
     }
 
     void beginFunction(Walrus::ModuleFunction* mf, bool inInitExpr)
diff --git a/third_party/wabt/src/walrus/binary-reader-walrus.cc b/third_party/wabt/src/walrus/binary-reader-walrus.cc
index cc6584da6..d8fe2883c 100644
--- a/third_party/wabt/src/walrus/binary-reader-walrus.cc
+++ b/third_party/wabt/src/walrus/binary-reader-walrus.cc
@@ -1350,16 +1350,16 @@ std::string ReadWasmBinary(const std::string &filename, const uint8_t *data, siz
     const bool kFailOnCustomSectionError = true;
     ReadBinaryOptions options(getFeatures(), nullptr, kReadDebugNames, kStopOnFirstError, kFailOnCustomSectionError);
     BinaryReaderDelegateWalrus binaryReaderDelegateWalrus(delegate, filename);
-    try {
-        ReadBinary(data, size, &binaryReaderDelegateWalrus, options);
-    } catch(const std::string& err) {
-        // error from WASMBinaryReader
-        return err;
-    }
+    Result result = ReadBinary(data, size, &binaryReaderDelegateWalrus, options);
 
-    if (binaryReaderDelegateWalrus.m_errors.size()) {
+    if (WABT_UNLIKELY(binaryReaderDelegateWalrus.m_errors.size())) {
         return std::move(binaryReaderDelegateWalrus.m_errors.begin()->message);
     }
+
+    if (WABT_UNLIKELY(result != ::wabt::Result::Ok)) {
+        return std::string("read wasm error");
+    }
+
     return std::string();
 }
 
diff --git a/tools/run-tests.py b/tools/run-tests.py
index 4d19d347a..0b489fa84 100755
--- a/tools/run-tests.py
+++ b/tools/run-tests.py
@@ -114,7 +114,7 @@ def run_core_tests(engine):
 
 
 @runner('wasi', default=True)
-def run_basic_tests(engine):
+def run_wasi_tests(engine):
     TEST_DIR = join(PROJECT_SOURCE_DIR, 'test', 'wasi')
 
     print('Running wasi tests:')
@@ -132,7 +132,7 @@ def run_basic_tests(engine):
 
 
 @runner('jit', default=True)
-def run_basic_tests(engine):
+def run_jit_tests(engine):
     TEST_DIR = join(PROJECT_SOURCE_DIR, 'test', 'jit')
 
     print('Running jit tests:')
@@ -142,7 +142,7 @@ def run_basic_tests(engine):
     tests_total = len(xpass)
     fail_total = xpass_result
     print('TOTAL: %d' % (tests_total))
-    print('%sPASS : %d%s' % (COLOR_GREEN, tests_total, COLOR_RESET))
+    print('%sPASS : %d%s' % (COLOR_GREEN, tests_total - fail_total, COLOR_RESET))
     print('%sFAIL : %d%s' % (COLOR_RED, fail_total, COLOR_RESET))
 
     if fail_total > 0: