Rust source make install fails due to missing vendor folder

[itarato]

I was building Rust (branch master) from source. ./configure and make completed without any problems, however sudo make install immediately fails with the following problem:

sudo make install
info: looks like you are running this command under `sudo`
      and so in order to preserve your $HOME this will now
      use vendored sources by default. Note that if this
      does not work you should run a normal build first
      before running a command like `sudo make install`
error: failed to load source for a dependency on `toml`

Caused by:
  Unable to update registry https://github.com/rust-lang/crates.io-index

Caused by:
  failed to update replaced source `registry https://github.com/rust-lang/crates.io-index`

Caused by:
  failed to read root of directory source: /mnt/shared/Checkout/rust/src/vendor

To learn more, run the command again with --verbose.
Makefile:71: recipe for target 'install' failed
make: *** [install] Error 101

The error: failed to load source for a dependency on 'toml' line is complaining about seemingly rangom things, such as cmake, toml or getopts. However the last line (failed to read root of directory source: /mnt/shared/Checkout/rust/src/vendor) is odd as it doesn't have any src/vendor folder and this kind of error is more likely on Rust projects using cargo.toml.

For reference, my build env:

• os: Ubuntu 16.04
• clang 3.8
• python 2.7
• make 4.1
• cmake 3.5.1
• curl 7.47
• git 2.7

I also have already installed via the official rustup script.

So far no luck getting closer to what would cause this. Do you have any idea where to look for?

[itarato]

Apology, wrong source, I resubmit it at the rust source issue queue. (rust-lang/rust#40108)