error[E0554]: #![feature] may not be used on the stable release channel
--> /home/ebin/.cargo/registry/src/github.com-1ecc6299db9ec823/orbtk-0.2.29/src/lib.rs:4:1
|
4 | #![feature(const_fn)]
| ^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try rustc --explain E0554.
error: Could not compile orbtk.
To learn more, run the command again with --verbose.
what is the reason for this error...
Looks like this crate can be used only with nightly compiler, but a quick search through the docs didn't reveal anything about it. Could someone provide a more full explanation?
As for the fix, just install the nightly toolchain (rustup toolchains add nightly) and use it for the project (cargo +nightly build).
Also make sure you have the latest compiler version. Older versions (such as the ones frozen in time in Linux distros) may be older than this feature.
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