diff --git a/binder/scope.cpp b/binder/scope.cpp
index 973869c45cdc75588dd58bf088a8b21da365b7a1..5e2fe718dd6755b01563e0104c14010f7a530ae9 100644
--- a/binder/scope.cpp
+++ b/binder/scope.cpp
@@ -256,7 +256,8 @@ void VariableScope::CheckDirectEval(compiler::CompilerContext *compilerCtx)
         }
     }
 
-    std::vector<compiler::Literal> literals(LexicalSlots() + constBindings);
+    std::vector<compiler::Literal> literals;
+    literals.reserve(LexicalSlots() + constBindings);
 
     if (constBindings == 0U) {
         for (const auto &[name, variable] : bindings_) {
@@ -264,26 +265,18 @@ void VariableScope::CheckDirectEval(compiler::CompilerContext *compilerCtx)
                 continue;
             }
 
-            literals[variable->AsLocalVariable()->LexIdx()] = compiler::Literal(name);
+            literals.emplace_back(compiler::Literal(name));
         }
     } else {
-        std::vector<binder::Variable *> bindings(LexicalSlots());
-
         for (const auto &[name, variable] : bindings_) {
             (void)name;
             if (!variable->LexicalBound()) {
                 continue;
             }
-
-            bindings[variable->AsLocalVariable()->LexIdx()] = variable;
-        }
-
-        uint32_t buffIndex = 0;
-        for (const auto *variable : bindings) {
             if (variable->Declaration()->IsConstDecl()) {
-                literals[buffIndex++] = compiler::Literal(true);
+                literals.emplace_back(compiler::Literal(true));
             }
-            literals[buffIndex++] = compiler::Literal(variable->Name());
+            literals.emplace_back(compiler::Literal(variable->Name()));
         }
     }
 
diff --git a/compiler/core/emitter.cpp b/compiler/core/emitter.cpp
index d854586e297d8e57593853f89ed0292b1d04df32..605c0579dfacefe4f15b1c6e282324ebb5db6c39 100644
--- a/compiler/core/emitter.cpp
+++ b/compiler/core/emitter.cpp
@@ -98,6 +98,7 @@ static LiteralPair TransformLiteral(const compiler::Literal *literal)
             break;
         }
         default:
+            UNREACHABLE();
             break;
     }