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-rw-r--r--src/libcoretest/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcoretest/lib.rs b/src/libcoretest/lib.rs
index 96886c91048..20da4a86bf5 100644
--- a/src/libcoretest/lib.rs
+++ b/src/libcoretest/lib.rs
@@ -31,6 +31,7 @@
 #![feature(libc)]
 #![feature(nonzero)]
 #![feature(num_bits_bytes)]
+#![feature(peekable_is_empty)]
 #![feature(ptr_as_ref)]
 #![feature(rand)]
 #![feature(range_inclusive)]