miden v0.8 fails to compile

[TomasArrachea]

In the context of the miden-faucet, I'm trying to implement the custom transaction script in Rust and use the compiler (WIP PR). For that I am following the project-template that depends on miden v0.7.

If I update to miden v0.8, it enforces rustc version 1.92. Then, I encounter the following error while compiling the crate:

36 | / compile_error!(
37 | |     "panic_immediate_abort is now a real panic strategy! \
38 | |     Enable it with `panic = \"immediate-abort\"` in Cargo.toml, \
39 | |     or with the compiler flags `-Zunstable-options -Cpanic=immediate-abort`. \
40 | |     In both cases, you still need to build core, e.g. with `-Zbuild-std`"
41 | | );
   | |_^

Not sure what is causing this.

[greenhat]

miden (SDK) v0.8 needs the latest version of the compiler. We released the compiler v0.6 yesterday. The rustc nightly is also changed to nightly-2025-12-10.
Make sure you're using v0.6 of the compiler (cargo install cargo-miden --locked) and set the new nightly in your project's rust-toolchain.toml.

[TomasArrachea]

Thanks! I was able to make it work. I had installed the latest compiler v0.6 with cargo install cargo-miden, but turns out that cargo didn't overwrite the binary installed by midenup, so I was actually still using v0.5.1.