panic_implementation - feature has been removed

[adamvm]

I faced this particular problem:

~/dev/rust/stm32-blue-pill-rust$ cargo check --release
   Compiling cortex-m-rt-macros v0.1.8
    Checking panic-semihosting v0.3.0
error[E0557]: feature has been removed
  --> /home/adi/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-semihosting-0.3.0/src/lib.rs:59:12
   |
59 | #![feature(panic_implementation)]
   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
   |
   = note: subsumed by `#[panic_handler]`

error: cannot find attribute `panic_implementation` in this scope
  --> /home/adi/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-semihosting-0.3.0/src/lib.rs:71:3
   |
71 | #[panic_implementation]
   |   ^^^^^^^^^^^^^^^^^^^^

error[E0554]: `#![feature]` may not be used on the stable release channel
  --> /home/adi/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-semihosting-0.3.0/src/lib.rs:59:1
   |
59 | #![feature(panic_implementation)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0554, E0557.
For more information about an error, try `rustc --explain E0554`.
error: could not compile `panic-semihosting`.

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed

I run this rust version:

$ rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: checking for self-updates

  stable-x86_64-unknown-linux-gnu unchanged - rustc 1.46.0 (04488afe3 2020-08-24)

info: cleaning up downloads & tmp directories