Merge pull request #8580 from jrose-apple/enable-experimental-deserialization-recovery

[Serialization] Proof-of-concept: drop overriding methods if the base is missing

lib/Frontend/CompilerInvocation.cpp

@@ -874,6 +874,9 @@ static bool ParseLangArgs(LangOptions &Opts, ArgList &Args,
   Opts.EnableClassResilience |=
     Args.hasArg(OPT_enable_class_resilience);
 
+  Opts.EnableDeserializationRecovery |=
+    Args.hasArg(OPT_enable_experimental_deserialization_recovery);
+
   Opts.DisableAvailabilityChecking |=
       Args.hasArg(OPT_disable_availability_checking);