diff --git a/src/main.cpp b/src/main.cpp
index 2f0959c..32ef127 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -88,7 +88,7 @@ int main(int argc, const char **argv) {
   ANTLRInputStream input(ifs_source_file);
   SysyLexer lexer(&input);
   CommonTokenStream tokens(&lexer);
-
+  ifs_source_file.close();
   // tokens.fill();
   // for (auto token : tokens.getTokens()) {
   //   std::cout << token->toString() << std::endl;
@@ -96,10 +96,12 @@ int main(int argc, const char **argv) {
 
   SysyParser parser(&tokens);
   parser.removeErrorListeners();
-  parser.addErrorListener(new AbortErrorListener());
+  auto _abort_listener = new AbortErrorListener();
+  parser.addErrorListener(_abort_listener);
   auto tree = parser.program();
   Visitor visitor(lexer);
   visitor.visitProgram(tree);
+  delete _abort_listener;
 
   std::vector<std::shared_ptr<Pass>> passes = {
     std::make_shared<PassBuildCFG>(),
@@ -127,6 +129,7 @@ int main(int argc, const char **argv) {
       return 1;
     }
     visitor.llir_gen(ofs_llir_file);
+    ofs_llir_file.close();
   }
 
   // std::cout << tree->toStringTree(&parser) << std::endl << std::endl;
@@ -141,6 +144,7 @@ int main(int argc, const char **argv) {
     mc_module.debug1 = true;
     mc_module.MC2ASM(ofs_virt_asm_file);
     mc_module.debug1 = false;
+    ofs_virt_asm_file.close();
 
     std::vector<sptr(MCPass)> mc_passes = {std::make_shared<PassRegAlloc>()};
     for (auto pass : mc_passes) {
@@ -152,6 +156,7 @@ int main(int argc, const char **argv) {
       return 1;
     }
     mc_module.MC2ASM(ofs_asm_file);
+    ofs_asm_file.close();
   }
   return 0;
 }
\ No newline at end of file
diff --git a/src/pass_mem2reg.cpp b/src/pass_mem2reg.cpp
index 461ee9a..914bc8d 100644
--- a/src/pass_mem2reg.cpp
+++ b/src/pass_mem2reg.cpp
@@ -82,7 +82,7 @@ static void live_in_blocks(
       }
       else if (Value::is<InstLoad>(itr)) {
         // a load before store, it live in this block
-        if (Value::as<InstLoad>(itr)->operand_list[1] == ai) break;
+        if (Value::as<InstLoad>(itr)->operand_list[0] == ai) break;
       }
     }
   }