v3.1.3-rc.2 compilation requirements / fix error[E0562]: impl Trait only allowed in function

[ThomasBlock]

compilation documentation is poor. i will document here how to do it for each version.

this worked for last versions:

go version
nvm -v
npm -v
yarn -v
rustup -V 
forge --version

go version go1.22.6 linux/amd64
0.39.3
10.7.0
1.22.22
rustup 1.27.1 (54dd3d00f 2024-04-24)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.73.0 (cc66ad468 2023-10-03)`
forge 0.2.0 (fa0e0c2 2024-08-22T00:19:42.723244048Z)

git checkout v3.1.3-rc.2
nvm use 18.20
make build 

but now we see this:

   Compiling wasmer v4.2.8 (/root/nitro/arbitrator/tools/wasmer/lib/api)
   Compiling prover v0.1.0 (/root/nitro/arbitrator/prover)
   Compiling caller-env v0.1.0 (/root/nitro/arbitrator/caller-env)
error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
   --> prover/src/machine.rs:350:53
    |
350 |     fn compose(self, other: impl ImportResolver) -> impl ImportResolver {
    |                                                     ^^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information

error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return types
   --> prover/src/machine.rs:364:44
    |
364 |     fn condition(self, condition: bool) -> impl ImportResolver {
    |                                            ^^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information

For more information about this error, try `rustc --explain E0562`.
error: could not compile `prover` (lib) due to 2 previous errors
make: *** [Makefile:328: target/lib/libstylus.a] Error 101

how to fix:

rustup install nightly
rustup default nightly

rustup -V 
rustup 1.27.1 (54dd3d00f 2024-04-24)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.83.0-nightly (1d68e6dd1 2024-09-21)`

[anegg0]

Duly noted, @ThomasBlock. Thanks much for bringing this to our attention. I will update the docs shortly.

[joshuacolvin0]

Documentation has been updated