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                serhii@serhii-Aspire-ES1-511 ~/main/rust/app $ cargo build --target wasm32-unknown-unknown --release
   Compiling itoa v0.4.1
   Compiling wasm-bindgen-shared v0.2.5
   Compiling serde v1.0.41
   Compiling dtoa v0.4.2
   Compiling num-traits v0.2.2
   Compiling unicode-xid v0.1.0
   Compiling proc-macro2 v0.3.6
error[E0433]: failed to resolve. Could not find `Group` in `proc_macro`
  --> /home/serhii/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.3.6/src/unstable.rs:63:45
   |
63 |                 let mut group = proc_macro::Group::new(delim, tt.stream.inner.0);
   |                                             ^^^^^ Could not find `Group` in `proc_macro`

error[E0433]: failed to resolve. Could not find `Op` in `proc_macro`
  --> /home/serhii/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.3.6/src/unstable.rs:72:42
   |
72 |                 let mut op = proc_macro::Op::new(tt.op(), spacing);
   |                                          ^^ Could not find `Op` in `proc_macro`

error[E0433]: failed to resolve. Could not find `token_stream` in `proc_macro`
   --> /home/serhii/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.3.6/src/unstable.rs:103:38
    |
103 | pub struct TokenTreeIter(proc_macro::token_stream::IntoIter);
    |                                      ^^^^^^^^^^^^ Could not find `token_stream` in `proc_macro`

error[E0554]: #![feature] may not be used on the stable release channel
  --> /home/serhii/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.3.6/src/lib.rs:28:34
   |
28 | #![cfg_attr(feature = "nightly", feature(proc_macro))]
   |                                  ^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors

error: Could not compile `proc-macro2`.
warning: build failed, waiting for other jobs to finish...
error: build failed

              
            
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