1 files changed, 6 insertions, 6 deletions
diff --git a/compiler/rustc_query_system/src/dep_graph/graph.rs b/compiler/rustc_query_system/src/dep_graph/graph.rs
index 04fc32a9b50..7e258aaa54f 100644
--- a/compiler/rustc_query_system/src/dep_graph/graph.rs
+++ b/compiler/rustc_query_system/src/dep_graph/graph.rs
@@ -498,12 +498,12 @@ impl<D: Deps> DepGraph<D> {
 
                     #[cfg(debug_assertions)]
                     {
-                        if let Some(target) = task_deps.node {
-                            if let Some(ref forbidden_edge) = data.current.forbidden_edge {
-                                let src = forbidden_edge.index_to_node.lock()[&dep_node_index];
-                                if forbidden_edge.test(&src, &target) {
-                                    panic!("forbidden edge {:?} -> {:?} created", src, target)
-                                }
+                        if let Some(target) = task_deps.node
+                            && let Some(ref forbidden_edge) = data.current.forbidden_edge
+                        {
+                            let src = forbidden_edge.index_to_node.lock()[&dep_node_index];
+                            if forbidden_edge.test(&src, &target) {
+                                panic!("forbidden edge {:?} -> {:?} created", src, target)
                             }
                         }
                     }