Bug #165282 is getting huge, and already tests interesting things and gets the useful functionality off the ground. We should go back and test other weird corner cases.
I left some FIXMEs in wasm-to-wasm.js to test other interesting things:
// FIXME: test wasm->wasm using 32-bit things (including float), as well as 64-bit NaNs that don't get canonicalized
// FIXME: do a throw two-deep
// FIXME: check that the first wasm's instance is back in OK state (with table or global?)
// FIXME: test calling through a Table