diff --git a/crates/jrsonnet-parser/src/expr.rs b/crates/jrsonnet-parser/src/expr.rs
index c381684f..081f5a66 100644
--- a/crates/jrsonnet-parser/src/expr.rs
+++ b/crates/jrsonnet-parser/src/expr.rs
@@ -1,4 +1,4 @@
-use gc::{Finalize, Trace};
+use gc::{Finalize, Trace, unsafe_empty_trace};
 use jrsonnet_interner::IStr;
 #[cfg(feature = "deserialize")]
 use serde::Deserialize;
@@ -21,7 +21,7 @@ pub enum FieldName {
 	Dyn(LocExpr),
 }
 impl Finalize for FieldName {}
-impl Trace for FieldName {
+unsafe impl Trace for FieldName {
 	unsafe_empty_trace!();
 }
 
@@ -37,7 +37,7 @@ pub enum Visibility {
 	Unhide,
 }
 impl Finalize for Visibility {}
-impl Trace for Visibility {
+unsafe impl Trace for Visibility {
 	unsafe_empty_trace!();
 }
 
@@ -52,7 +52,7 @@ impl Visibility {
 #[derive(Clone, Debug, PartialEq)]
 pub struct AssertStmt(pub LocExpr, pub Option<LocExpr>);
 impl Finalize for AssertStmt {}
-impl Trace for AssertStmt {
+unsafe impl Trace for AssertStmt {
 	unsafe_empty_trace!();
 }
 
@@ -67,7 +67,7 @@ pub struct FieldMember {
 	pub value: LocExpr,
 }
 impl Finalize for FieldMember {}
-impl Trace for FieldMember {
+unsafe impl Trace for FieldMember {
 	unsafe_empty_trace!();
 }
 
@@ -80,7 +80,7 @@ pub enum Member {
 	AssertStmt(AssertStmt),
 }
 impl Finalize for Member {}
-impl Trace for Member {
+unsafe impl Trace for Member {
 	unsafe_empty_trace!();
 }
 
@@ -94,7 +94,7 @@ pub enum UnaryOpType {
 	Not,
 }
 impl Finalize for UnaryOpType {}
-impl Trace for UnaryOpType {
+unsafe impl Trace for UnaryOpType {
 	unsafe_empty_trace!();
 }
 
@@ -146,7 +146,7 @@ pub enum BinaryOpType {
 	Or,
 }
 impl Finalize for BinaryOpType {}
-impl Trace for BinaryOpType {
+unsafe impl Trace for BinaryOpType {
 	unsafe_empty_trace!();
 }
 
@@ -186,7 +186,7 @@ impl Display for BinaryOpType {
 #[derive(Debug, PartialEq)]
 pub struct Param(pub IStr, pub Option<LocExpr>);
 impl Finalize for Param {}
-impl Trace for Param {
+unsafe impl Trace for Param {
 	unsafe_empty_trace!();
 }
 
@@ -196,7 +196,7 @@ impl Trace for Param {
 #[derive(Debug, Clone, PartialEq)]
 pub struct ParamsDesc(pub Rc<Vec<Param>>);
 impl Finalize for ParamsDesc {}
-impl Trace for ParamsDesc {
+unsafe impl Trace for ParamsDesc {
 	unsafe_empty_trace!();
 }
 
@@ -212,7 +212,7 @@ impl Deref for ParamsDesc {
 #[derive(Debug, PartialEq)]
 pub struct Arg(pub Option<String>, pub LocExpr);
 impl Finalize for Arg {}
-impl Trace for Arg {
+unsafe impl Trace for Arg {
 	unsafe_empty_trace!();
 }
 
@@ -221,7 +221,7 @@ impl Trace for Arg {
 #[derive(Debug, PartialEq)]
 pub struct ArgsDesc(pub Vec<Arg>);
 impl Finalize for ArgsDesc {}
-impl Trace for ArgsDesc {
+unsafe impl Trace for ArgsDesc {
 	unsafe_empty_trace!();
 }
 
@@ -241,7 +241,7 @@ pub struct BindSpec {
 	pub value: LocExpr,
 }
 impl Finalize for BindSpec {}
-impl Trace for BindSpec {
+unsafe impl Trace for BindSpec {
 	unsafe_empty_trace!();
 }
 
@@ -250,7 +250,7 @@ impl Trace for BindSpec {
 #[derive(Debug, PartialEq)]
 pub struct IfSpecData(pub LocExpr);
 impl Finalize for IfSpecData {}
-impl Trace for IfSpecData {
+unsafe impl Trace for IfSpecData {
 	unsafe_empty_trace!();
 }
 
@@ -259,7 +259,7 @@ impl Trace for IfSpecData {
 #[derive(Debug, PartialEq)]
 pub struct ForSpecData(pub IStr, pub LocExpr);
 impl Finalize for ForSpecData {}
-impl Trace for ForSpecData {
+unsafe impl Trace for ForSpecData {
 	unsafe_empty_trace!();
 }
 
@@ -271,7 +271,7 @@ pub enum CompSpec {
 	ForSpec(ForSpecData),
 }
 impl Finalize for CompSpec {}
-impl Trace for CompSpec {
+unsafe impl Trace for CompSpec {
 	unsafe_empty_trace!();
 }
 
@@ -286,7 +286,7 @@ pub struct ObjComp {
 	pub compspecs: Vec<CompSpec>,
 }
 impl Finalize for ObjComp {}
-impl Trace for ObjComp {
+unsafe impl Trace for ObjComp {
 	unsafe_empty_trace!();
 }
 
@@ -298,7 +298,7 @@ pub enum ObjBody {
 	ObjComp(ObjComp),
 }
 impl Finalize for ObjBody {}
-impl Trace for ObjBody {
+unsafe impl Trace for ObjBody {
 	unsafe_empty_trace!();
 }
 
@@ -314,7 +314,7 @@ pub enum LiteralType {
 	False,
 }
 impl Finalize for LiteralType {}
-impl Trace for LiteralType {
+unsafe impl Trace for LiteralType {
 	unsafe_empty_trace!();
 }
 
@@ -325,7 +325,7 @@ pub struct SliceDesc {
 	pub step: Option<LocExpr>,
 }
 impl Finalize for SliceDesc {}
-impl Trace for SliceDesc {
+unsafe impl Trace for SliceDesc {
 	unsafe_empty_trace!();
 }
 
@@ -397,7 +397,7 @@ pub enum Expr {
 	},
 }
 impl Finalize for Expr {}
-impl Trace for Expr {
+unsafe impl Trace for Expr {
 	unsafe_empty_trace!();
 }
 
@@ -407,7 +407,7 @@ impl Trace for Expr {
 #[derive(Clone, PartialEq)]
 pub struct ExprLocation(pub Rc<PathBuf>, pub usize, pub usize);
 impl Finalize for ExprLocation {}
-impl Trace for ExprLocation {
+unsafe impl Trace for ExprLocation {
 	unsafe_empty_trace!();
 }
 
@@ -423,7 +423,7 @@ impl Debug for ExprLocation {
 #[derive(Clone, PartialEq)]
 pub struct LocExpr(pub Rc<Expr>, pub Option<ExprLocation>);
 impl Finalize for LocExpr {}
-impl Trace for LocExpr {
+unsafe impl Trace for LocExpr {
 	unsafe_empty_trace!();
 }