diff --git a/src/parser/WASMParser.cpp b/src/parser/WASMParser.cpp
index 75c816864..eaed0d442 100644
--- a/src/parser/WASMParser.cpp
+++ b/src/parser/WASMParser.cpp
@@ -530,10 +530,11 @@ class WASMBinaryReader : public wabt::WASMBinaryReaderDelegate {
         }
 
         m_vmStack.push_back(VMStackInfo(*this, type, pos, m_functionStackSizeSoFar, localIndex));
-        m_functionStackSizeSoFar += Walrus::valueStackAllocatedSize(type);
-        if (UNLIKELY(m_functionStackSizeSoFar > std::numeric_limits<Walrus::ByteCodeStackOffset>::max())) {
+        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).");
         }
+        m_functionStackSizeSoFar += allocSize;
         m_currentFunction->m_requiredStackSize = std::max(
             m_currentFunction->m_requiredStackSize, m_functionStackSizeSoFar);
     }
diff --git a/src/runtime/Memory.cpp b/src/runtime/Memory.cpp
index 9903d48a2..a11518c64 100644
--- a/src/runtime/Memory.cpp
+++ b/src/runtime/Memory.cpp
@@ -41,7 +41,7 @@ Memory::Memory(uint64_t initialSizeInByte, uint64_t maximumSizeInByte)
     , m_maximumSizeInByte(maximumSizeInByte)
     , m_buffer(nullptr)
 {
-    RELEASE_ASSERT(initialSizeInByte <= std::numeric_limits<size_t>::max());
+    ASSERT(initialSizeInByte <= std::numeric_limits<size_t>::max());
 #if defined(WALRUS_USE_MMAP)
     if (m_maximumSizeInByte) {
 #ifndef WALRUS_32_MEMORY_INITIAL_MMAP_RESERVED_ADDRESS_SIZE
diff --git a/src/shell/Shell.cpp b/src/shell/Shell.cpp
index 3ee5485ca..34cc33a65 100644
--- a/src/shell/Shell.cpp
+++ b/src/shell/Shell.cpp
@@ -655,8 +655,9 @@ static void executeWAST(Store* store, const std::string& filename, const std::ve
     auto result = wabt::ParseWastScript(lexer.get(), &script, &errors, &parse_wast_options);
     if (!wabt::Succeeded(result)) {
         printf("Syntax error(s):\n");
-        for (auto e : errors)
+        for (auto& e : errors) {
             printf("  %s\n", e.message.c_str());
+        }
         printf("\n");
         RELEASE_ASSERT_NOT_REACHED();
     }
@@ -1000,7 +1001,7 @@ int main(int argc, char* argv[])
         FILE* fp = fopen(filePath.data(), "r");
         if (fp) {
             fseek(fp, 0, SEEK_END);
-            auto sz = ftell(fp);
+            size_t sz = ftell(fp);
             fseek(fp, 0, SEEK_SET);
             std::vector<uint8_t> buf;
             buf.resize(sz);
@@ -1008,7 +1009,7 @@ int main(int argc, char* argv[])
             fclose(fp);
             // read again with binary mode if result is not success
             // this one needs for windows
-            if (ret != sz) {
+            if (UNLIKELY((size_t)ret != sz)) {
                 FILE* fp = fopen(filePath.data(), "rb");
                 fread(buf.data(), sz, 1, fp);
                 fclose(fp);