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-rw-r--r--src/libsyntax/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index a96fee0cf8f..0184a3214b5 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -7,7 +7,7 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/", test(attr(deny(warnings))))]
 #![feature(bool_to_option)]
 #![feature(box_syntax)]
-#![feature(const_fn)]
+#![feature(const_fn)] // For the `transmute` in `P::new`
 #![feature(const_transmute)]
 #![feature(crate_visibility_modifier)]
 #![feature(label_break_value)]