diff --git a/lldb/source/API/SBLaunchInfo.cpp b/lldb/source/API/SBLaunchInfo.cpp
--- a/lldb/source/API/SBLaunchInfo.cpp
+++ b/lldb/source/API/SBLaunchInfo.cpp
@@ -387,9 +387,14 @@
   if (error.Fail())
     return;
 
-  StructuredData::DictionarySP dict_sp;
-  llvm::json::OStream s(stream.ref().AsRawOstream());
-  dict_sp->Serialize(s);
+  StructuredData::ObjectSP obj_sp =
+      StructuredData::ParseJSON(std::string(stream.GetData()));
+  if (!obj_sp)
+    return;
+
+  StructuredData::DictionarySP dict_sp(obj_sp->GetAsDictionary());
+  if (!dict_sp)
+    return;
 
   m_opaque_sp->SetScriptedProcessDictionarySP(dict_sp);
 }