- [Panic Implementation](./panic-implementation.md)
- [AST Validation](./ast-validation.md)
- [Feature Gate Checking](./feature-gate-ck.md)
+ - [Lang Items](./lang-items.md)
- [The HIR (High-level IR)](./hir.md)
- [Lowering AST to HIR](./lowering.md)
- [Debugging](./hir-debugging.md)