Alignment test failure on the latest testsuite

[CharlieTap]

I also posted this here: WebAssembly/testsuite#96

Effectively the latest testsuite has tests for exponents greater than 64 which falls into the condition where the mem index is encoded, and thus fails. The proposal should probably copy align.wast and alter those tests to account for the exponent subtraction.

[rossberg]

I updated the repo by syncing with upstream and removing the tests in question (since they are no longer meaningful in the presence of multi-memory).

FWIW, the issue is also closely related to the ongoing discussion on WebAssembly/spec#1788.

[CharlieTap]

Looks like it might have failed one of the CI checks but thank you!

[rossberg]

That looks like node.js failing one of the tests. Maybe it's current V8 isn't up-to-date enough?