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-rw-r--r--src/libregex/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libregex/lib.rs b/src/libregex/lib.rs
index 45f42336ceb..002b74cf1ef 100644
--- a/src/libregex/lib.rs
+++ b/src/libregex/lib.rs
@@ -24,6 +24,7 @@
        html_playground_url = "http://play.rust-lang.org/")]
 
 #![allow(unknown_features)]
+#![allow(unstable)]
 #![feature(slicing_syntax)]
 #![feature(box_syntax)]
 #![allow(unknown_features)] #![feature(int_uint)]