can't compile with `-Zfmt-debug=none`

[Paladynee]

Describe the bug
Failed to compile using -Zfmt-debug=none

To Reproduce
have dependency: image = "0.25.5"
try compile:

fn main() {
    let args = std::env::args().collect::<Vec<_>>();
    let file = std::fs::File::open(&args[1]).expect("couldn't find file");
    let reader = std::io::BufReader::new(&file);
    let image_reader = image::ImageReader::new(reader).with_guessed_format().expect("could not guess the format");
    let output_path = std::path::Path::new(&args[2]);
    let output_format = output_path
        .extension()
        .expect("could not get extension")
        .to_str()
        .expect("could not convert to string");
    let output_file = std::fs::File::create(output_path).expect("couldn't create file");
    let mut writer = std::io::BufWriter::new(&output_file);
    let image = image_reader.decode().expect("could not decode image");
    image
        .write_to(
            &mut writer,
            image::ImageFormat::from_extension(output_format).expect("could not get output format"),
        )
        .expect("could not write to file");
}

with:
RUSTFLAGS=-Zfmt-debug=none"
command= cargo build --release

Expected behavior
The crate successfully compiles given the specific features.

Required Information
Toolchain (if is a build problem): nightly

$ cargo --version
cargo 1.86.0-nightly (fd784878c 2025-01-03)
$ rustc --version
rustc 1.86.0-nightly (1891c2866 2025-01-04)
$ nasm --version # if on x86_64
NASM version 2.16.02 compiled on Apr  4 2024

Version:

$ rav1e --version
# not installed

Operating system:

windows 10

Console Output

PS C:\Users\eurydice\Desktop\folders\iterator_theory> cargo build --release
   Compiling rav1e v0.7.1
error: expected expression, found `;`
  --> C:\Users\eurydice\Desktop\folders\iterator_theory\target\release\build\rav1e-2ef05ade2c5dc359\out/built.rs:66:33
   |
66 | pub const FEATURES: [&str; 1] = ;
   |                                 ^ expected expression