Index: clangd/index/SymbolCollector.cpp
===================================================================
--- clangd/index/SymbolCollector.cpp
+++ clangd/index/SymbolCollector.cpp
@@ -369,6 +369,10 @@
   if (!ID)
     return true;
 
+  // ObjCPropertyDecl may have an OrigD of ObjCPropertyImplDecl, which is
+  // not a NamedDecl.
+  if (!isa<NamedDecl>(ASTNode.OrigD))
+    return true;
   const NamedDecl &OriginalDecl = *cast<NamedDecl>(ASTNode.OrigD);
   const Symbol *BasicSymbol = Symbols.find(*ID);
   if (!BasicSymbol) // Regardless of role, ND is the canonical declaration.