WGPU 26.0.0 fails to compile due to naga dependency error

[altunenes]

hello I tried to update wgpu (I have had 24.0.1). But seems WGPU 26.0.0 cannot be compiled due to a trait bound error in the naga 26.0.0 dependency.

    Checking aho-corasick v1.1.3
error[E0277]: the trait bound `std::string::String: WriteColor` is not satisfied
  --> /Users/enes/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/naga-26.0.0/src/error.rs:50:17
   |
50 |                 writer.inner_mut(),
   |                 ^^^^^^^^^^^^^^^^^^ the trait `WriteColor` is not implemented for `std::string::String`
   |
   = help: the following other types implement trait `WriteColor`:
             &'a mut T
             Ansi<W>
             Box<T>
             Buffer
             BufferedStandardStream
             NoColor<W>
             Sink
             StandardStream
           and 2 others
   = note: required for the cast from `&mut std::string::String` to `&mut dyn WriteColor`

error[E0277]: the trait bound `std::string::String: WriteColor` is not satisfied
   --> /Users/enes/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/naga-26.0.0/src/front/wgsl/error.rs:112:20
    |
112 |         term::emit(writer.inner_mut(), &config, &files, &self.diagnostic())
    |                    ^^^^^^^^^^^^^^^^^^ the trait `WriteColor` is not implemented for `std::string::String`
    |
    = help: the following other types implement trait `WriteColor`:
              &'a mut T
              Ansi<W>
              Box<T>
              Buffer
              BufferedStandardStream
              NoColor<W>
              Sink
              StandardStream
            and 2 others
    = note: required for the cast from `&mut std::string::String` to `&mut dyn WriteColor`

    Checking avif-serialize v0.8.5

env:

• Rust: Latest stable
• OS: macOS

FYI my cargo toml:

[dependencies]
wgpu = "=26.0.0"
winit = "0.30.11"
bytemuck = { version = "1.21", features = ["derive"] }
egui-wgpu = "=0.32.0"
egui = "=0.32.0"
egui-winit = "=0.32.0"
image = { version = "0.25.6", features = ["png", "hdr","exr"] }
env_logger = "0.11.6"
pollster = "0.4.0"
rfd = "0.15.1"
notify = "7.0.0"
gstreamer = { version = "0.23.7", optional = true }
gstreamer-video = { version = "0.23.6", optional = true }
gstreamer-app = { version = "0.23.5", optional = true }
gstreamer-pbutils = { version = "0.23.5", optional = true }
anyhow = "1.0.96"
log = "0.4.25"
fontdue = "0.9.0"

any ideas? thank you

[altunenes]

https://github.com/emilk/egui/blob/fdcaff8465eac8db8cc1ebbcbb9b97e0791a8363/Cargo.lock#L2647

Its related to Egui (they still use v25)

[cwfitzgerald]

I'm investigating this now, I'm going to re-open it, as there's still something wrong. What happens is codespan-reporting gains the "termcolor" and "std" feature, then we fail to compile. Something about this is non-additive.

[cwfitzgerald]

Alright, yeah this appears to be a bug in codespan-reporting. https://github.com/brendanzab/codespan/blob/master/codespan-reporting/src/term.rs#L28-L30 accepts less types the more features that are enabled.

[Resonanz]

I can confirm the OP's reported error on Linux using egui and wgpu version 26.0.1. Changing to version 25.0.1 compiles.

[nicoburns]

Running into this with naga and wasm-opt in the same workspace. I think it's wasm-opt's cxx dependency that was causing the issue. Luckily in my case I was able to remove wasm-opt, but it would definitely be good to get a proper fix (a lot of people are going to be stuck on WGPU 26 for some time due to Bevy 0.17 having just released with that version).

[altunenes]

I can confirm the OP's reported error on Linux using egui and wgpu version 26.0.1. Changing to version 25.0.1 compiles.

27 also not working :/ I stucked with 25 :-D

https://github.com/altunenes/cuneus/blob/8a8f6a405c5de338b972e0b28970c22523354d19/Cargo.toml#L14