fix(runtime): a Map/Set subclass in a base-typed binding was read as a raw header (#7570) (#7573)

is_map_expr/is_set_expr decided 'this receiver is a Map/Set' from the DECLARED TypeScript type and emitted a raw js_map_* call that dereferences the receiver as a MapHeader. A subclass instance is a plain ObjectHeader, so entries: *mut f64 read parent_class_id||field_count -- SIGBUS on the first .set(). Resolved at the runtime entry points via a GcHeader brand check in clean_map_ptr/clean_set_ptr, so the emitted IR is byte-identical and the fast path is one load and compare.

Author: proggeramlug

CLAUDE.md

@@ -8,7 +8,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 Perry is a native TypeScript compiler written in Rust that compiles TypeScript source code directly to native executables. It uses SWC for TypeScript parsing and LLVM for code generation.
 
-**Current Version:** 0.5.1334
+**Current Version:** 0.5.1335
 
 
 ## TypeScript Parity Status