Internal compiler error: An attempt to get register for unknown Value.

[ewynx]

When trying to compile the predicate in this repo https://github.com/hashcloak/fuel-crypto/tree/wallet_predicate/predicate, using forc 0.40.1 it gives the following error:

error: Internal compiler error: An attempt to get register for unknown Value.
Please file an issue on the repository and include the code that triggered this error.

The predicate code starts here: https://github.com/hashcloak/fuel-crypto/blob/wallet_predicate/predicate/src/main.sw#L51

If we copy some of the functionality directly in the main function (instead of calling them from a library), it's possible to get a little bit further, but then eventually will bump into the error posted in this other issue: #4625

[vaivaswatha]

The error reported here should be solved by #4628. However just as with #4511 and #4625 , after the fix, I'm seeing

error: Internal compiler error: The allocator cannot resolve a register mapping for this program. This is a temporary artifact of the early stage version of this compiler.  Using #[inline(never)] on some functions may help.
Please file an issue on the repository and include the code that triggered this error.

I'm going to close this as there are two other tracking the same problem.

[vaivaswatha]

On second thought, I'll leave the issue open and close it after it all works, just to be sure.

[man2706kum]

Since #4628 was merged in master, the predicate should get compiled by forc build from source but the error error: The allocator cannot resolve a register mapping for this program.... is still showing up.