mongodb find().sort({a:1}): a user .sort() on a call-result receiver lowers to Array.prototype.sort (comparison function TypeError) #11187

With #11157's fix and #11146 applied to origin/main 93a86ff, the mongodb 7.5.0 CRUD fixture (bson 7.3.3, auto-optimize on) connects, and insertMany of 3 documents succeeds. The next call fails:

const found = await collection.find({}).sort({ a: 1 }).toArray();
TypeError: The comparison function must be either a function or undefined: #<Object>

FindCursor.prototype.sort(sort, direction) is a user method. Perry lowers .sort(<object>) on a call-result receiver to Array.prototype.sort, and that throws on the non-function argument.

Package-free repro

class Cursor {
  opts: any = {};
  sort(sort: any, direction?: any) { this.opts.sort = { sort, direction }; return this; }
}
const holder: any = { find() { return new Cursor(); } };
try { console.log("A", JSON.stringify(holder.find().sort({ a: 1 }).opts)); } catch (e: any) { console.log("A error", e.message); }
const c: any = holder.find();
try { console.log("B", JSON.stringify(c.sort({ a: 1 }).opts)); } catch (e: any) { console.log("B error", e.message); }

Node 26.5.1:

A {"sort":{"sort":{"a":1}}}
B {"sort":{"sort":{"a":1}}}

Perry (93a86ff + #11157 fix + #11146, perry-dev, Linux x64, PERRY_NO_AUTO_OPTIMIZE=1):

A error The comparison function must be either a function or undefined: #<Object>
B {"sort":{"sort":{"a":1}}}

Binding the receiver to a local first (B) works. Only the chained call-result receiver (A) goes to the array path. The error text comes from the array-sort lowering in crates/perry-hir/src/lower/expr_call/{array_only_methods,local_array_methods,imported_array_methods}.rs. I have not checked which of these takes the call-result receiver.

This does not look related to the #11157 change (HIR class-declaration self-binding). I have not re-run it on a pristine main build.