Revert "Update to wasmi v0.32 and add lazy validation (#1488)"

[tomaka]

Reverts #1488

cc @Robbepop

While working on #1483, I noticed that some Wasm runtime calls fail with:

panicked at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/alloc/src/collections/btree/navigate.rs:535:47:\ncalled Option::unwrap() on a None value

Reverting #1488 fixes this issue, so I'm going to revert for now.

The code that is panicking is very low-level, so I'm suspecting some kind of memory corruption or miscompilation or something like that.

[Robbepop]

Okay thanks for letting me know. Going to investigate as soon as possible.

[tomaka]

To clarify, the panic in btree/navigate.rs comes from the Rust code that was compiled to Wasm, and executing this Wasm with wasmi 0.32 triggers it while executing it with wasmi 0.31 doesn't.

[tomaka]

I could make a reproducible case, but it's a bit complicated because there are a lot of imported functions and a lot of calls to these imported functions.

[Robbepop]

I could make a reproducible case, but it's a bit complicated because there are a lot of imported functions and a lot of calls to these imported functions.

I would really appreciate that if you would do that but if not I can also try doing it. Very certainly going to be needed.

[Robbepop]

@tomaka I just release Wasmi v0.32.0-beta.3 with many bug fixes. I will continue the bug hunt but maybe this new version fixes the problems you encountered with one of the Polkadot runtimes?

https://github.com/paritytech/wasmi/releases/tag/v0.32.0-beta.3

[tomaka]

It seems to work now!