borrow block_data instead of moving it

diff --git a/src/librustc_mir/transform/nll/infer.rs b/src/librustc_mir/transform/nll/infer.rs
index 8e08fc91735fb3324d3945e021f0873b2b54dd27..92942c38f4a897a91c0f3e2c7c5f497bfffa9786 100644 (file)
--- a/src/librustc_mir/transform/nll/infer.rs
+++ b/src/librustc_mir/transform/nll/infer.rs
@@ -166,7 +166,7 @@ fn copy(
 
             changed |= to_region.add_point(p);
 
-            let block_data = self.mir[p.block];
+            let block_data = &self.mir[p.block];
             let successor_points = if p.statement_index < block_data.statements.len() {
                 vec![Location {
                     statement_index: p.statement_index + 1,