diff --git a/lib/edlang_codegen_llvm/src/codegen.rs b/lib/edlang_codegen_llvm/src/codegen.rs
index 1d799d173..bf259925d 100644
--- a/lib/edlang_codegen_llvm/src/codegen.rs
+++ b/lib/edlang_codegen_llvm/src/codegen.rs
@@ -33,13 +33,13 @@ struct ModuleCompileCtx<'ctx, 'm> {
     di_builder: DebugInfoBuilder<'ctx>,
     di_unit: DICompileUnit<'ctx>,
     target_data: TargetData,
-    module_id: DefId,
+    _module_id: DefId,
     di_namespace: DIScope<'ctx>,
 }
 
 impl<'ctx, 'm> ModuleCompileCtx<'ctx, 'm> {
-    pub fn get_module_body(&self) -> &ModuleBody {
-        self.ctx.program.modules.get(&self.module_id).unwrap()
+    pub fn _get_module_body(&self) -> &ModuleBody {
+        self.ctx.program.modules.get(&self._module_id).unwrap()
     }
 
     pub fn set_debug_loc(&self, scope: DIScope<'ctx>, span: Span) -> DILocation<'ctx> {
@@ -122,7 +122,7 @@ pub fn compile(session: &Session, program: &ProgramBody) -> Result<PathBuf, Box<
             di_unit,
             builder: &builder,
             target_data: machine.get_target_data(),
-            module_id: *module_id,
+            _module_id: *module_id,
             di_namespace,
         };
 
@@ -248,7 +248,7 @@ fn compile_fn(ctx: &ModuleCompileCtx, fn_id: DefId) -> Result<(), BuilderError>
     let di_program = fn_value.get_subprogram().unwrap();
 
     let mut debug_loc = ctx.set_debug_loc(di_program.as_debug_info_scope(), body.fn_span);
-    let mut lexical_block = ctx.di_builder.create_lexical_block(
+    let lexical_block = ctx.di_builder.create_lexical_block(
         debug_loc.get_scope(),
         ctx.di_unit.get_file(),
         debug_loc.get_line(),
@@ -911,7 +911,7 @@ fn compile_value<'ctx>(
     })
 }
 
-fn compile_type<'a>(
+fn _compile_type<'a>(
     ctx: &'a ModuleCompileCtx,
     ty: &ir::TypeInfo,
 ) -> inkwell::types::AnyTypeEnum<'a> {
diff --git a/lib/edlang_lowering/src/common.rs b/lib/edlang_lowering/src/common.rs
index 11d1df801..51f536fc5 100644
--- a/lib/edlang_lowering/src/common.rs
+++ b/lib/edlang_lowering/src/common.rs
@@ -70,7 +70,7 @@ impl BodyBuilder {
         id
     }
 
-    pub fn add_temp_local(&mut self, ty_kind: TypeKind) -> usize {
+    pub fn _add_temp_local(&mut self, ty_kind: TypeKind) -> usize {
         let id = self.body.locals.len();
         self.body.locals.push(Local::temp(TypeInfo {
             span: None,
@@ -79,7 +79,7 @@ impl BodyBuilder {
         id
     }
 
-    pub fn get_local(&self, name: &str) -> Option<&Local> {
+    pub fn _get_local(&self, name: &str) -> Option<&Local> {
         self.body.locals.get(*(self.name_to_local.get(name)?))
     }
 
diff --git a/lib/edlang_lowering/src/lib.rs b/lib/edlang_lowering/src/lib.rs
index 0f9c27aa9..c3daff8cc 100644
--- a/lib/edlang_lowering/src/lib.rs
+++ b/lib/edlang_lowering/src/lib.rs
@@ -1,12 +1,12 @@
 use std::collections::HashMap;
 
 use ast::ModuleStatement;
-use common::{BodyBuilder, BuildCtx, IdGenerator};
+use common::{BodyBuilder, BuildCtx};
 use edlang_ast as ast;
 use edlang_ir as ir;
 use ir::{
-    BasicBlock, Body, ConstData, ConstKind, DefId, Local, LocalKind, Operand, Place, ProgramBody,
-    RValue, Statement, StatementKind, Terminator, TypeInfo, TypeKind,
+    BasicBlock, Body, DefId, Local, LocalKind, Operand, Place, ProgramBody, Statement,
+    StatementKind, Terminator, TypeInfo, TypeKind,
 };
 
 mod common;
diff --git a/lib/edlang_parser/src/lib.rs b/lib/edlang_parser/src/lib.rs
index c357865f2..39e78eb14 100644
--- a/lib/edlang_parser/src/lib.rs
+++ b/lib/edlang_parser/src/lib.rs
@@ -125,6 +125,6 @@ mod test {
 
     #[test]
     fn test_ident() {
-        parse_ast("hello");
+        parse_ast("hello").unwrap();
     }
 }