opencv-0.93.0/build.rs:203:26 compile error:expected &str, found String

[phial3]

Before reporting an issue please first check the
troubleshooting guide. If
the issue you're encountering is not solved thereby please state the following in your bugreport:

1. Operating system : MacOS M2
2. The way you installed OpenCV: package by homebrew
3. OpenCV version : 4.10.0
4. rustc version : rustc 1.83.0-nightly (1d68e6dd1 2024-09-21)
5. Attach the full output of the following command from your project directory:

   RUST_BACKTRACE=full cargo build -vv 

error[E0308]: mismatched types
   --> /Users/admin/.cargo/registry/src/rsproxy-0dccff568467c15b/opencv-0.93.0/build.rs:203:26
    |
203 |             out.flag_if_supported(format!("-F{}", p.to_str().expect("Can't convert path to str")));
    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `&str`, found `String`
    |
    = note: this error originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)

[twistedfall]

That's weird looks like you have an old cc crate, can you please show the output you're getting when running in the project directory:

cargo tree | grep cc

[twistedfall]

Although I must say that no version of cc after the minimum supported 1.0.83 has had &str as an argument to flag_if_supported(), they all have impl AsRef<OsStr>. Maybe it's a regression in rustc's nightly?

[phial3]

That's weird looks like you have an old cc crate, can you please show the output you're getting when running in the project directory:

cargo tree | grep cc

this is cc v1.0.83

[phial3]

That's weird looks like you have an old cc crate, can you please show the output you're getting when running in the project directory:

cargo tree | grep cc

this is cc v1.0.83

I don't know why is that, rust stable 1.81.0 is the same mistake.

use opencv = "0.92", it's good

[twistedfall]

Can you please also try doing cargo clean to see if it helps with the issue?

[phial3]

Can you please also try doing cargo clean to see if it helps with the issue?

I've tried it, and the mistake is still there

error[E0308]: mismatched types
   --> /Users/admin/.cargo/registry/src/rsproxy-0dccff568467c15b/opencv-0.93.0/build.rs:203:26
    |
203 |             out.flag_if_supported(format!("-F{}", p.to_str().expect("Can't convert path to str")));
    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `&str`, found `String`
    |
    = note: this error originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0308`.
error: could not compile `opencv` (build script) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

[twistedfall]

Thank you for reporting! This regression should now be fixed in v0.93.1

[phial3]

Thank you for reporting! This regression should now be fixed in v0.93.1

👍👍👍