cargo embed --release causes defmt version mismatch

[nvsd]

when running cargo embed --release I get the error

Error defmt wire format version mismatch: firmware is using 3, `probe-run` supports 4
suggestion: use a newer version of `defmt` or `cargo install` a different version of `probe-run` that supports defmt 3

Which is pretty weird because those versions seem wrong anyways?

Not quite sure what's going on here.

[9names]

Cargo-embed has an error message mentioning probe-run? I never noticed that before.
Anyway, this is documented here rp-rs/rp-hal#581

I thought we fixed it in the template...

[nvsd]

Sorry, just to clarify I'm talking about cargo embed specifically. It seems like the fixes in the template were focused around probe run only.

I got the fix from a probe-rs matrix user which is to run cargo install --locked --force cargo-embed.

I'm happy to open a PR to update the readme I'm not quite sure where or how you'd like to word that though considering it's temporary and could be fixed any day now.

[jannic]

I'd just update the example to read cargo install --locked cargo-embed. Even if the fix is only needed temporarily, using the --locked flag seems to be a good idea in general, as discussed on matrix.

Not 100% sure about the --force flag, but I think I won't add it to the README. You only need it if you already installed the binary without the --locked flag, and you get a helpful message in that case: Ignored package cargo-embed v0.18.0 is already installed, use --force to override.

[nvsd]

Ok, will do that. Thanks again @jannic for all of the help here and on Matrix.