Failed to run `hello_world` example: type annotations needed

[valentinegb]

Attempting to run the hello_world example using crank as instructed in the README results in a whole lot of errors along the lines of "type annotations needed":

error[E0282]: type annotations needed
  --> src/lib.rs:84:13
   |
84 |             Ok(raw_fn())
   |             ^^^^^^^^^^^^ cannot infer type
   |
  ::: src/display.rs:25:13
   |
25 |             pd_func_caller!((*self.0).getWidth)?,
   |             ----------------------------------- in this macro invocation
   |
   = note: this error originates in the macro `pd_func_caller` (in Nightly builds, run with -Z macro-backtrace for more info)

Here's the full output: crank.log

I am on macOS 15.4 Beta (24E5228e) with Playdate SDK 2.6.2 installed using Homebrew and Rust 1.85.0.

[boozook]

Hi! Seems to you need older nightly rust-toolchain.

[valentinegb]

How old? Is there a known-good toolchain?

[missfunmi]

Hey @valentinegb

I had the same issue as you and just figured out a (the?) solution. I've submitted a pr #94 to fix it, but feel free to just apply the one-liner change directly in your local if you're still blocked on this.