From 87687a292f18b3365587253b8862521a7d4cca96 Mon Sep 17 00:00:00 2001
From: Xi Ge <xi_ge@apple.com>
Date: Wed, 25 Jun 2025 11:35:09 -0700
Subject: [PATCH] ABI checker: drop usage of
 AllowDeserializingImplementationOnly

AllowDeserializingImplementationOnly was historically added as a defensive
check against deserailzation issues introduced by @implementationOnly imports.
It's no longer specified by other tools, thus the ABI checker should drop
it as well.

rdar://153683760
---
 lib/DriverTool/swift_api_digester_main.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lib/DriverTool/swift_api_digester_main.cpp b/lib/DriverTool/swift_api_digester_main.cpp
index e90269541f93b..3201888446189 100644
--- a/lib/DriverTool/swift_api_digester_main.cpp
+++ b/lib/DriverTool/swift_api_digester_main.cpp
@@ -2453,8 +2453,6 @@ class SwiftAPIDigesterInvocation {
     InitInvoke.getLangOptions().EnableObjCInterop =
         InitInvoke.getLangOptions().Target.isOSDarwin();
     InitInvoke.getClangImporterOptions().ModuleCachePath = ModuleCachePath;
-    // Module recovery issue shouldn't bring down the tool.
-    InitInvoke.getLangOptions().AllowDeserializingImplementationOnly = true;
 
     if (!SwiftVersion.empty()) {
       using version::Version;