The following test case using `br_on_null` crashes on some tiers: ``` //@ runWebAssemblySuite("--useWebAssemblyTypedFunctionReferences=true", "--useWebAssemblyGC=true") import * as assert from "../assert.js"; import { compile, instantiate } from "./wast-wrapper.js"; instantiate(` (module (type (struct (field i32))) (func (export "f") (block (struct.new 0 (i32.const 42)) (br_on_null 0) (struct.get 0 0) drop )) ) `).exports.f(); ``` It works fine in BBQJIT, but seems to have issues in LLInt (possibly OMG). The problem is the returned reference on a non-taken branch case is not handled quite right.