diff options
| -rw-r--r-- | src/librustc/dep_graph/graph.rs | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/librustc/dep_graph/graph.rs b/src/librustc/dep_graph/graph.rs index c487fc963ca..34cb1d2a6d7 100644 --- a/src/librustc/dep_graph/graph.rs +++ b/src/librustc/dep_graph/graph.rs @@ -235,10 +235,13 @@ impl DepGraph { debug_str_gen: F) where F: FnOnce() -> String { - let mut dep_node_debug = self.data.as_ref().unwrap().dep_node_debug.borrow_mut(); + let dep_node_debug = &self.data.as_ref().unwrap().dep_node_debug; - dep_node_debug.entry(dep_node) - .or_insert_with(debug_str_gen); + if dep_node_debug.borrow().contains_key(&dep_node) { + return + } + let debug_str = debug_str_gen(); + dep_node_debug.borrow_mut().insert(dep_node, debug_str); } pub(super) fn dep_node_debug_str(&self, dep_node: DepNode) -> Option<String> { |