Verification error after function inlining

Hi,
It seems binaryen (7d5d24f) creates invalid blocks after function body inlining.

Steps to reproduce:

1. Download wasm file from here and unpack index.wasm file
2. Run wasm-opt --enable-gc --enable-reference-types --enable-exception-handling --enable-bulk-memory --enable-nontrapping-float-to-int -O4 index.wasm -o indexOpt.wasm
3. Get error:
   [wasm-validator error in function kotlin.wasm.internal.jsToKotlinAnyAdapter] unexpected false: non-final block elements returning a value must be drop()ed (binaryen's autodrop option might help you), on (block $__inlined_func$kotlin.wasm.internal.externRefToAny$53 (result (ref null $kotlin.Any)) (block $label$1 (result anyref) (br $__inlined_func$kotlin.wasm.internal.externRefToAny$53 (br_on_cast_fail $label$1 $kotlin.Any (extern.internalize (local.get $0) ) ) ) ) (call $kotlin.wasm.internal.jsToKotlinAnyAdapter (call $kotlin.wasm.internal.jsCheckIsNullOrUndefinedAdapter (call $fimport$8 (local.get $0) (extern.externalize (struct.new $kotlin.wasm.internal.JsExternalBox (global.get $kotlin.wasm.internal.JsExternalBox.vtable) (ref.null none) (i32.const 888) (i32.const 0) (local.get $0) ) ) ) ) ) ) (on index 0: 0x13081ce08 ), type: anyref Fatal: error after opts

It seems br_on_cast_fail return value is not dropped (the original wasm file contains this drop)

With -O3 everything works fine.
V8 and JsShell works fine.

Reproduce the failure with wasm-opt using the supplied index.wasm and optimization flags, then inspect function inlining and handling of br_on_cast_fail values. Compare the optimized output with the original drop and use the validator error as the completion check; wasm-opt should finish without the invalid-block error.