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-rw-r--r--dhall_proc_macros/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/dhall_proc_macros/src/lib.rs b/dhall_proc_macros/src/lib.rs
index 92cf981..3e41254 100644
--- a/dhall_proc_macros/src/lib.rs
+++ b/dhall_proc_macros/src/lib.rs
@@ -1,3 +1,4 @@
+#![feature(drain_filter)]
//! This crate contains the code-generation primitives for the [dhall-rust][dhall-rust] crate.
//! This is highly unstable and breaks regularly; use at your own risk.
//!