diff --git a/Cargo.lock b/Cargo.lock
index 5a346e53..cb8d890d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -15,7 +15,7 @@ dependencies = [
 
 [[package]]
 name = "erg"
-version = "0.2.8"
+version = "0.3.0"
 dependencies = [
  "erg_common",
  "erg_compiler",
@@ -25,14 +25,14 @@ dependencies = [
 
 [[package]]
 name = "erg_common"
-version = "0.2.8"
+version = "0.3.0"
 dependencies = [
  "atty",
 ]
 
 [[package]]
 name = "erg_compiler"
-version = "0.2.8"
+version = "0.3.0"
 dependencies = [
  "erg_common",
  "erg_parser",
@@ -41,14 +41,14 @@ dependencies = [
 
 [[package]]
 name = "erg_parser"
-version = "0.2.8"
+version = "0.3.0"
 dependencies = [
  "erg_common",
 ]
 
 [[package]]
 name = "erg_type"
-version = "0.2.8"
+version = "0.3.0"
 dependencies = [
  "erg_common",
 ]
diff --git a/compiler/erg_compiler/context/inquire.rs b/compiler/erg_compiler/context/inquire.rs
index 4996180e..9dff6252 100644
--- a/compiler/erg_compiler/context/inquire.rs
+++ b/compiler/erg_compiler/context/inquire.rs
@@ -901,7 +901,7 @@ impl Context {
                     return Some((t, ctx));
                 }
             }
-            _ => todo!(),
+            other => todo!("{other}"),
         }
         if let Some(outer) = &self.outer {
             outer.rec_get_nominal_type_ctx(typ)
diff --git a/compiler/erg_compiler/context/register.rs b/compiler/erg_compiler/context/register.rs
index 43338bc9..cb1a38c4 100644
--- a/compiler/erg_compiler/context/register.rs
+++ b/compiler/erg_compiler/context/register.rs
@@ -170,7 +170,7 @@ impl Context {
                     }
                     let vis = ident.vis();
                     let vi = VarInfo::new(generalized, muty, vis, VarKind::Defined(id));
-                    self.params.push((Some(ident.name.clone()), vi));
+                    self.locals.insert(ident.name.clone(), vi);
                     Ok(())
                 }
             }
diff --git a/compiler/erg_compiler/hir.rs b/compiler/erg_compiler/hir.rs
index 6421c3ae..0f7e0999 100644
--- a/compiler/erg_compiler/hir.rs
+++ b/compiler/erg_compiler/hir.rs
@@ -1136,8 +1136,7 @@ pub struct Def {
 
 impl NestedDisplay for Def {
     fn fmt_nest(&self, f: &mut fmt::Formatter<'_>, level: usize) -> fmt::Result {
-        self.sig.fmt_nest(f, level)?;
-        writeln!(f, " {}", self.body.op.content)?;
+        writeln!(f, "{} {}", self.sig, self.body.op.content)?;
         self.body.block.fmt_nest(f, level + 1)
     }
 }
diff --git a/compiler/erg_parser/ast.rs b/compiler/erg_parser/ast.rs
index b1453b41..1dcb14ff 100644
--- a/compiler/erg_parser/ast.rs
+++ b/compiler/erg_parser/ast.rs
@@ -2389,8 +2389,7 @@ pub struct Def {
 
 impl NestedDisplay for Def {
     fn fmt_nest(&self, f: &mut fmt::Formatter<'_>, level: usize) -> fmt::Result {
-        self.sig.fmt_nest(f, level)?;
-        writeln!(f, " {}", self.body.op.content)?;
+        writeln!(f, "{} {}", self.sig, self.body.op.content)?;
         self.body.block.fmt_nest(f, level + 1)
     }
 }
diff --git a/compiler/erg_parser/parse.rs b/compiler/erg_parser/parse.rs
index 5813d873..90b49d61 100644
--- a/compiler/erg_parser/parse.rs
+++ b/compiler/erg_parser/parse.rs
@@ -1645,10 +1645,6 @@ impl Parser {
             self.errs.push(err);
             return Err(());
         }
-        // REVIEW: need this?
-        while self.cur_is(Newline) {
-            self.skip();
-        }
         let body = self.try_reduce_block().map_err(|_| self.stack_dec())?;
         self.counter.inc();
         self.level -= 1;