From 94f830adb3fca81836a76518d189f07f808dea15 Mon Sep 17 00:00:00 2001
From: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date: Wed, 18 Mar 2020 21:32:19 +0100
Subject: [PATCH] Allow features prefixed with "crate:" for namespaced-features

See description of the unstable cargo feature here:

https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#namespaced-features

This allows crates that enable namespaced features to be published to a
crate registry.
---
 src/models/krate.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/models/krate.rs b/src/models/krate.rs
index 6e73ae54ca3..1ab11e6c79e 100644
--- a/src/models/krate.rs
+++ b/src/models/krate.rs
@@ -280,6 +280,9 @@ impl Crate {
     pub fn valid_feature(name: &str) -> bool {
         let mut parts = name.split('/');
         match parts.next() {
+            Some(part) if part.starts_with("crate:") => {
+                return Crate::valid_feature_name(&part[6..]) && parts.next().is_none();
+            }
             Some(part) if !Crate::valid_feature_name(part) => return false,
             None => return false,
             _ => {}