Revert "Correct Incremental Extension Test"

This reverts commit d65ab09.

Author: CodaFi

lib/AST/DeclContext.cpp

@@ -1034,6 +1034,11 @@ Optional<Fingerprint> IterableDeclContext::getBodyFingerprint() const {
 
 bool IterableDeclContext::areTokensHashedForThisBodyInsteadOfInterfaceHash()
     const {
+  // Do not keep separate hashes for extension bodies because the dependencies
+  // can miss the addition of a member in an extension because there is nothing
+  // corresponding to the fingerprinted nominal dependency node.
+  if (isa<ExtensionDecl>(this))
+    return false;
   return true;
 }
 

test/Incremental/Fingerprints/Inputs/extension-adds-member/definesAB-after.swift

@@ -3,7 +3,7 @@ struct A {
 struct B {
 }
 extension A {
-  init(_ x: String = "") {}
+  var x: Int {17}
 }
 extension B {
 }