Cargo install fails: component unavailable for x86_64-apple-darwin

[xrl]

I'm coming back to an old laptop, haven't used it in ~6 months, and I'm trying to get my environment updated.

I had rustfmt in the cargo bin folder and I cleared it out.

Now I have the latest rustup and rustc nightly and the rustfmt install from the README fails, here's a log:

LP-XLANGE-OSX:~ xlange$ rustup update
info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: syncing channel updates for 'nightly-x86_64-apple-darwin'
info: checking for self-updates

   stable-x86_64-apple-darwin unchanged - rustc 1.31.0 (abe02cefd 2018-12-04)
  nightly-x86_64-apple-darwin unchanged - rustc 1.32.0-nightly (4a45578bc 2018-12-07)

LP-XLANGE-OSX:~ xlange$ rustup default nightly
info: using existing install for 'nightly-x86_64-apple-darwin'
info: default toolchain set to 'nightly-x86_64-apple-darwin'

  nightly-x86_64-apple-darwin unchanged - rustc 1.32.0-nightly (4a45578bc 2018-12-07)

LP-XLANGE-OSX:~ xlange$ rustup --version
rustup 1.16.0 (beab5ac2b 2018-12-06)
LP-XLANGE-OSX:~ xlange$ rustup component add rustfmt --toolchain nightly
error: component 'rustfmt' for target 'x86_64-apple-darwin' is unavailable for download

I'm on OS X 10.13.6, btw.

LP-XLANGE-OSX:~ xlange$ uname -a
Darwin LP-XLANGE-OSX 17.7.0 Darwin Kernel Version 17.7.0: Thu Jun 21 22:53:14 PDT 2018; root:xnu-4570.71.2~1/RELEASE_X86_64 x86_64

Also, the rustfmt package is not installed by rustup:

LP-XLANGE-OSX:~ xlange$ rustup component remove rustfmt
error: toolchain 'nightly-x86_64-apple-darwin' does not contain component 'rustfmt' for target 'x86_64-apple-darwin'

[scampi]

This could be due to rust-lang/rust#56667

[palfrey]

https://mexus.github.io/rustup-components-history/ says 2018-12-14 has it again