"std::io::Read not implemented for UartDriver" anymore?

[gb6881]

Hi,

unluckily i did an espup update (afaik) and now i'm getting a message i cannot compile my project anymore.
orignally i'm using them sml-rs package, but i've stripped it down:

❯ CRATE_CC_NO_DEFAULTS=1 cargo build Compiling bindgen v0.69.5 Compiling embuild v0.32.0 Compiling esp-idf-sys v0.35.0 Compiling esp-idf-hal v0.44.1 Compiling esp-idf-svc v0.49.1 Compiling test-esp-idf-sys v0.1.0 (/Users/gb/Documents/PRIVATE/esp/test) error[E0277]: the trait bound UartDriver<'>: std::io::Readis not satisfied --> src/main.rs:22:33 | 22 | Ok(r ) => { from_reader(r);} | ----------- ^ the traitstd::io::Readis not implemented forUartDriver<'>| | | required by a bound introduced by this call | note: required by a bound infrom_reader--> src/main.rs:26:23 | 26 | pub fn from_reader<R: std::io::Read>( _reader: R) { | ^^^^^^^^^^^^^ required by this bound infrom_reader`

For more information about this error, try rustc --explain E0277.
error: could not compile test-esp-idf-sys (bin "test-esp-idf-sys") due to 1 previous error`

test project sources:
test.zip

build target: xtensa-esp32s3-espidf

output espup update:
`
[info]: Updating the Espressif Rust ecosystem
[info]: Checking Rust installation
[info]: Installing RISC-V Rust targets ('riscv32imc-unknown-none-elf', 'riscv32imac-unknown-none-elf' and 'riscv32imafc-unknown-none-elf') for 'nightly' toolchain
[info]: Installing GCC (xtensa-esp-elf)
[warn]: Previous installation of GCC exists in: '/Users/gb/.rustup/toolchains/esp/xtensa-esp-elf/esp-14.2.0_20240906'. Reusing this installation
[warn]: Previous installation of LLVM exists in: '/Users/gb/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-18.1.2_20240912'. Reusing this installation
[info]: Creating symlink between '/Users/gb/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-18.1.2_20240912/esp-clang/lib' and '/Users/gb/.espup/esp-clang'
[warn]: Previous installation of Xtensa Rust 1.82.0.3 exists in: '/Users/gb/.rustup/toolchains/esp'. Reusing this installation
[info]: Update successfully completed!

    To get started, you need to set up some environment variables by running: '. /Users/gb/export-esp.sh'
    This step must be done every time you open a new terminal.
        See other methods for setting the environment in https://esp-rs.github.io/book/installation/riscv-and-xtensa.html#3-set-up-the-environment-variables

`
i'm runing a arm mac (mac os 15.1.1), but had the same message also under linux.

any idea what changed, what i can do to fix this problem?

Thanks, Georg

[Vollbrecht]

Are you sure you are talking about std::io::Read and not some other Read trait? We never implemented a std::io::Read on UartDriver as far as i can see. We provide the embedded_io Read impls alongside with e-hal_nb and e-hal_0.2 impls, and if i check the history of uart.rs with `git log -p -- uart.rs | grep "::Read"`` i dont see where there was at any time such a implementation?

[ivmarkov]

I also think we have never implemented std::io::Read. There are adapters that adapt embedded_io::Read to std::io::Read and that's why I think we never implemented those.

[gb6881]

Thanks for you quick reply!

then i'll have to look, from which dependency this implementation vanished :)