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-rw-r--r--src/compiletest/compiletest.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/compiletest/compiletest.rs b/src/compiletest/compiletest.rs
index 7f80458de33..278ce5565d9 100644
--- a/src/compiletest/compiletest.rs
+++ b/src/compiletest/compiletest.rs
@@ -21,6 +21,7 @@
 #![feature(test)]
 #![feature(unicode)]
 #![feature(env)]
+#![feature(core)]
 
 #![deny(warnings)]