patch-base_trace__event_memory__dump__manager.cc

--- base/trace_event/memory_dump_manager.cc.orig	2022-04-01 07:48:30 UTC
+++ base/trace_event/memory_dump_manager.cc
@@ -82,7 +82,7 @@ const char* const MemoryDumpManager::kSystemAllocatorP
 #if defined(MALLOC_MEMORY_TRACING_SUPPORTED)
     MallocDumpProvider::kAllocatedObjects;
 #else
-    nullptr;
+    "";
 #endif
 
 // static