From 1731e613e41776be6934c26b4087b7a40d09958a Mon Sep 17 00:00:00 2001
From: Steven Wu <stevenwu@apple.com>
Date: Wed, 24 Apr 2024 15:33:31 -0700
Subject: [PATCH] [Caching] Remove the error for creating multiple CAS at same
 location

Remove the CASError that prevents creating two different CAS at the same
CAS path. This allows build system to create compatible CAS at the same
location even the configuration is slightly different.
---
 .../InterModuleDependencyOracle.swift                     | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyOracle.swift b/Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyOracle.swift
index c54bc30a0..d865abc96 100644
--- a/Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyOracle.swift
+++ b/Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyOracle.swift
@@ -189,12 +189,6 @@ public class InterModuleDependencyOracle {
       if let cas = createdCASMap[casOpt] {
         return cas
       }
-      if let path = onDiskPath {
-        guard !seenCASPath.contains(path) else {
-          throw DependencyScanningError.casError("Cannot create two different CAS at the same OnDiskPath")
-        }
-        seenCASPath.insert(path)
-      }
       let cas = try swiftScan.createCAS(pluginPath: pluginPath?.pathString, onDiskPath: onDiskPath?.pathString, pluginOptions: pluginOptions)
       createdCASMap[casOpt] = cas
       return cas
@@ -234,7 +228,5 @@ public class InterModuleDependencyOracle {
 
   /// Storing the CAS created via CASConfig.
   internal var createdCASMap: [CASConfig: SwiftScanCAS] = [:]
-  /// The on disk path seen by CAS creation function.
-  internal var seenCASPath: Set<AbsolutePath> = []
 }