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-rw-r--r--compiler/rustc_mir_transform/src/const_prop.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_mir_transform/src/const_prop.rs b/compiler/rustc_mir_transform/src/const_prop.rs
index 05d59a7acf4..2408d38be7d 100644
--- a/compiler/rustc_mir_transform/src/const_prop.rs
+++ b/compiler/rustc_mir_transform/src/const_prop.rs
@@ -61,7 +61,7 @@ pub struct ConstProp;
 
 impl<'tcx> MirPass<'tcx> for ConstProp {
     fn is_enabled(&self, sess: &rustc_session::Session) -> bool {
-        sess.mir_opt_level() >= 2
+        sess.mir_opt_level() >= 1
     }
 
     #[instrument(skip(self, tcx), level = "debug")]