Error creating new project

[alexborisov]

Bug description

Trying to run cargo pio init esp --platform espressif32 --frameworks espidf --board esp32-s3-devkitm-1 and fails due to error in generated Cargo.toml

[embuild::pio] Configuring MCU 'ESP32S3' supported by the configured board 'esp32-s3-devkitm-1'
[embuild::pio] Resolved platform: 'espressif32', MCU: 'ESP32S3', board: 'esp32-s3-devkitm-1', frameworks: [espidf]
    Creating library package
note: see more `Cargo.toml` keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
Error: TOML parse error at line 4, column 11
  |
4 | edition = "2024"
  |           ^^^^^^
data did not match any variant of untagged enum Inheritable


Caused by:
    TOML parse error at line 4, column 11
      |
    4 | edition = "2024"
      |           ^^^^^^
    data did not match any variant of untagged enum Inheritable

• Would you like to work on a fix? would fix myself, but unable to find where the source of the issue lies.

To Reproduce

1. Install latest from cargo
2. Run cargo pio.... as above
3. Witness the error.

Expected behavior

The process to succeed.

Environment

• Crate (cargo-pio) version: [0.26.0]
• OS: [MacOS 15.3]

[MindRoadGabriel]

Hi,

I ran into this same error message. I spent some time on it. It seems rust stable 1.85 made edition 2024 the default, but embuild is using an old version of the cargo.toml parsing, that doesn't have 2024 in its enum.

My suggestion for a permanent fix, then, would probably be to update the cargo_toml version, but since you filed this yesterday you might be interested in a more immediate fix. The workaround I found was to use an older rust toolchain version for just the creation command. Then I can go back to using my preferred toolchain after the project is generated.

Try cargo +1.84.0 pio init esp --platform espressif32 --frameworks espidf --board esp32-s3-devkitm-1

I have a different platform and target, but for reference, the command that didn't work for me was
cargo pio new --board disco_f746ng my_project
and the command that worked was both
cargo +1.84.0 pio new --board disco_f746ng my_project
and
cargo +1.84.0-x86_64-pc-windows-gnu pio new --board disco_f746ng my_project

Hope it works for you too.