cargo build fail in osx

[yrong]

➜  parity-bridges-common git:(master) cargo --version
cargo 1.49.0-nightly (79b397d72 2020-10-15)
➜  parity-bridges-common git:(master) rustc --version
rustc 1.49.0-nightly (043eca7f0 2020-10-17)
➜  parity-bridges-common git:(master) cargo +nightly build
   Compiling rialto-runtime v0.1.0 (/Users/ronyang/Dev/myrust/parity-bridges-common/bin/rialto/runtime)
   Compiling millau-runtime v0.1.0 (/Users/ronyang/Dev/myrust/parity-bridges-common/bin/millau/runtime)
   Compiling async-executor v1.3.0
   Compiling blocking v1.0.0
   Compiling tokio-codec v0.1.2
   Compiling h2 v0.1.26
   Compiling http-body v0.1.0
   Compiling tokio v0.2.22
   Compiling zeroize_derive v1.0.1
error: failed to run custom build command for `millau-runtime v0.1.0 (/Users/ronyang/Dev/myrust/parity-bridges-common/bin/millau/runtime)`

Caused by:
  process didn't exit successfully: `/Users/ronyang/Dev/myrust/parity-bridges-common/target/debug/build/millau-runtime-7230b5e86000f8f3/build-script-build` (exit code: 1)
  --- stdout
  Executing build command: "/Users/ronyang/.rustup/toolchains/nightly-x86_64-apple-darwin/bin/cargo" "rustc" "--target=wasm32-unknown-unknown" "--manifest-path=/Users/ronyang/Dev/myrust/parity-bridges-common/target/debug/wbuild/millau-runtime/Cargo.toml" "--color=always" "--release"

  --- stderr
      Blocking waiting for file lock on package cache
      Blocking waiting for file lock on package cache
     Compiling wasm-build-runner-impl v1.0.0 (/Users/ronyang/Dev/myrust/parity-bridges-common/target/debug/wbuild-runner/millau-runtime3159355152638062222)
      Finished dev [unoptimized + debuginfo] target(s) in 3.49s
       Running `/Users/ronyang/Dev/myrust/parity-bridges-common/target/debug/wbuild-runner/millau-runtime3159355152638062222/target/x86_64-apple-darwin/debug/wasm-build-runner-impl`
     Compiling sp-arithmetic v2.0.0
     Compiling primitive-types v0.7.2
  error[E0282]: type annotations needed
      --> /Users/ronyang/.cargo/registry/src/github.com-1ecc6299db9ec823/sp-arithmetic-2.0.0/src/fixed_point.rs:541:9
       |
  541  |                   let accuracy = P::ACCURACY.saturated_into();
       |                       ^^^^^^^^ consider giving `accuracy` a type
  ...
  1595 | / implement_fixed!(
  1596 | |     FixedI64,
  1597 | |     test_fixed_i64,
  1598 | |     i64,
  ...    |
  1601 | |     "_Fixed Point 64 bits signed, range = [-9223372036.854775808, 9223372036.854775807]_",
  1602 | | );
       | |__- in this macro invocation
       |
       = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

  error[E0282]: type annotations needed
      --> /Users/ronyang/.cargo/registry/src/github.com-1ecc6299db9ec823/sp-arithmetic-2.0.0/src/fixed_point.rs:541:9
       |
  541  |                   let accuracy = P::ACCURACY.saturated_into();
       |                       ^^^^^^^^ consider giving `accuracy` a type
  ...
  1604 | / implement_fixed!(
  1605 | |     FixedI128,
  1606 | |     test_fixed_i128,
  1607 | |     i128,
  ...    |
  1611 | |         [-170141183460469231731.687303715884105728, 170141183460469231731.687303715884105727]_",
  1612 | | );
       | |__- in this macro invocation
       |
       = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

  error[E0282]: type annotations needed
      --> /Users/ronyang/.cargo/registry/src/github.com-1ecc6299db9ec823/sp-arithmetic-2.0.0/src/fixed_point.rs:541:9
       |
  541  |                   let accuracy = P::ACCURACY.saturated_into();
       |                       ^^^^^^^^ consider giving `accuracy` a type
  ...
  1614 | / implement_fixed!(
  1615 | |     FixedU128,
  1616 | |     test_fixed_u128,
  1617 | |     u128,
  ...    |
  1621 | |         [0.000000000000000000, 340282366920938463463.374607431768211455]_",
  1622 | | );
       | |__- in this macro invocation
       |
       = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

  error: aborting due to 3 previous errors

  For more information about this error, try `rustc --explain E0282`.
  error: could not compile `sp-arithmetic`

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

[tomusdrw]

Please downgrade your nightly, cause the latest one has a regression which prevents it from compiling substrate, see more: paritytech/substrate#7303