feature(llvm_asm, test, specialization, const_fn))] has been removed

[listen-lavender]

cargo install -v rustsym

rustc 1.55.0-nightly (5a7834050 2021-06-23)
cargo 1.54.0-nightly (44456677b 2021-06-12)

     Running `rustc --crate-name serde_json --edition=2018 /Users/lavenderuni/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.64/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="std"' -C metadata=3fdbdc286ac4f6ab -C extra-filename=-3fdbdc286ac4f6ab --out-dir /var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps -L dependency=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps --extern itoa=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libitoa-19a71e5d68c66870.rmeta --extern ryu=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libryu-324322cff132e118.rmeta --extern serde=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libserde-8b7b39554089312e.rmeta --cap-lints allow --cfg limb_width_64`
     Running `rustc --crate-name extprim /Users/lavenderuni/.cargo/registry/src/github.com-1ecc6299db9ec823/extprim-1.7.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="rand"' --cfg 'feature="serde"' --cfg 'feature="use-std"' -C metadata=6fa3bcbf11d1d84d -C extra-filename=-6fa3bcbf11d1d84d --out-dir /var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps -L dependency=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps --extern num_traits=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libnum_traits-e513228520d90021.rmeta --extern rand=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/librand-da651ec487764c79.rmeta --extern serde=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libserde-8b7b39554089312e.rmeta --cap-lints allow --cfg 'extprim_channel="unstable"' --cfg extprim_has_stable_i128`
error[E0557]: feature has been removed
  --> /Users/lavenderuni/.cargo/registry/src/github.com-1ecc6299db9ec823/extprim-1.7.1/src/lib.rs:58:81
   |
58 | #![cfg_attr(extprim_channel="unstable", feature(llvm_asm, test, specialization, const_fn))]
   |                                                                                 ^^^^^^^^ feature has been removed
   |
   = note: split into finer-grained feature gates

error: aborting due to previous error

For more information about this error, try `rustc --explain E0557`.
error: could not compile `extprim`

Caused by:
  process didn't exit successfully: `rustc --crate-name extprim /Users/lavenderuni/.cargo/registry/src/github.com-1ecc6299db9ec823/extprim-1.7.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="rand"' --cfg 'feature="serde"' --cfg 'feature="use-std"' -C metadata=6fa3bcbf11d1d84d -C extra-filename=-6fa3bcbf11d1d84d --out-dir /var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps -L dependency=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps --extern num_traits=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libnum_traits-e513228520d90021.rmeta --extern rand=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/librand-da651ec487764c79.rmeta --extern serde=/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY/release/deps/libserde-8b7b39554089312e.rmeta --cap-lints allow --cfg 'extprim_channel="unstable"' --cfg extprim_has_stable_i128` (exit status: 1)
warning: build failed, waiting for other jobs to finish...
    Building [========================>  ] 79/83: serde_json



error: failed to compile `rustsym v0.3.2`, intermediate artifacts can be found at `/var/folders/lk/wv4ldjss537fmrfc34j5tfsm0000gn/T/cargo-installNddKiY`

Caused by:
  build failed