x86_64 v0.12.3 No longer works on Nightly.

[Rdna123]

Error:

error[E0557]: feature has been removed
 --> C:\Users\chknm\.cargo\registry\src\github.com-1ecc6299db9ec823\x86_64-0.12.3\src\lib.rs:9:43
  |
9 | #![cfg_attr(feature = "const_fn", feature(const_in_array_repeat_expressions))]
  |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ feature has been removed
  |
  = note: removed due to causing promotable bugs
error: could not compile `x86_64`

An update is required to work.

[Rdna123]

Needed to update dependencies.