Cargo rejects SPDX 3.0 license identifiers

[zgtm]

The documentation describes the license field of a Cargo.toml with

This is a string description of the license for this package. Currently
crates.io will validate the license provided against a whitelist of known
license identifiers from http://spdx.org/licenses/. Multiple licenses can be
separated with a /.

http://spdx.org/licenses/ lists GPL3 with the identifiers GPL-3.0-only and GPL-3.0-or-later. However using the latter one, cargo publish gives me the error message:

error: api errors: unknown license or other term: GPL-3.0-or-later; see http://opensource.org/licenses for options, and http://spdx.org/licenses/ for their identifiers

I'm using

$ cargo --version
cargo 0.25.0 (8c93e0895 2018-02-01)

As someone pointed out to me in the IRC, this might be due to the cargo registry using the crate license-exprs, which only parses SPDX v2 identifiers.

[sfackler]

Duplicate of #4930.

[carols10cents]

Closing as duplicate of #4930.