Fix build on nightly
Fix build on nightly

https://github.com/rust-lang/rust/pull/27857

graydon/rust,graydon/rust,studoot/rustfmt,aidancully/rust,aidancully/rust,graydon/rust,flutterhash/rustfmt,graydon/rust,graydon/rust,studoot/rustfmt,rust-lang/rustfmt,aidancully/rust,SingingTree/rustfmt,rust-lang/rustfmt,aidancully/rust,aidancully/rust,aidancully/rust,Emilgardis/rustfmt,graydon/rust,SingingTree/rustfmt,Emilgardis/rustfmt