fix: remove incorrect dynamic attr check

nix-js/src/ir/utils.rs

@@ -529,16 +529,21 @@ where
         binding_keys.push(alias_sym);
     }
 
-    let (required, optional) = params
-        .iter()
-        .partition_map(|Param { sym, sym_span, default, .. }| {
+    let (required, optional) = params.iter().partition_map(
+        |Param {
+             sym,
+             sym_span,
+             default,
+             ..
+         }| {
             use itertools::Either::*;
             if default.is_none() {
                 Left((*sym, *sym_span))
             } else {
                 Right((*sym, *sym_span))
             }
-        });
+        },
+    );
 
     let slots: Vec<_> = ctx.reserve_slots(binding_keys.len()).collect();
     let let_bindings: HashMap<_, _> = binding_keys
@@ -790,9 +795,6 @@ fn finalize_pending_value<Ctx: DowngradeContext, const ALLOW_DYN: bool>(
 ) -> Result<ExprId> {
     match value {
         PendingValue::Expr(expr) => {
-            if !ALLOW_DYN {
-                check_no_dynamic_attrs(&expr, ctx)?;
-            }
             let id = Downgrade::downgrade(expr, ctx)?;
             Ok(ctx.maybe_thunk(id))
         }
@@ -830,24 +832,3 @@ fn finalize_pending_value<Ctx: DowngradeContext, const ALLOW_DYN: bool>(
         }
     }
 }
-
-/// Check that an expression doesn't contain dynamic attributes (for let bindings).
-fn check_no_dynamic_attrs(expr: &ast::Expr, ctx: &impl DowngradeContext) -> Result<()> {
-    let ast::Expr::AttrSet(attrset) = expr else {
-        return Ok(());
-    };
-    for v in attrset.attrpath_values() {
-        v.attrpath().unwrap().attrs().try_for_each(|attr| {
-            if let ast::Attr::Dynamic(dyn_attr) = attr {
-                Err(Error::downgrade_error(
-                    "dynamic attributes not allowed in let bindings".to_string(),
-                    ctx.get_current_source(),
-                    dyn_attr.syntax().text_range(),
-                ))
-            } else {
-                Ok(())
-            }
-        })?;
-    }
-    Ok(())
-}