1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Demangle/RustDemangle.cpp b/llvm/lib/Demangle/RustDemangle.cpp
index 582cdbc..3ce73f5 100644
--- a/llvm/lib/Demangle/RustDemangle.cpp
+++ b/llvm/lib/Demangle/RustDemangle.cpp
@@ -232,8 +232,12 @@ bool Demangler::demanglePath(InType InType, LeaveOpen LeaveOpen) {
       print(">");
     break;
   }
+  case 'B': {
+    bool IsOpen = false;
+    demangleBackref([&] { IsOpen = demanglePath(InType, LeaveOpen); });
+    return IsOpen;
+  }
   default:
-    // FIXME parse remaining productions.
     Error = true;
     break;
   }