wasm-decompile: Assertion `is_name()' failed. about wabt

[keithw]

I think the root issue here is that wasm-decompile doesn't know how to handle a br to the implicit function label, which is basically equivalent to a return. My guess is that wasm-opt is converting this to a return, which wasm-decompile does know how to handle.

Here's a minimal test case that also triggers the same assertion failure:

(func br 0)

Handling this cleanly is probably pretty doable but requires some mucking with the decompiler.