[RelatedIdents] Fix an assertion failure if two invalid declarations have the same base name

include/swift/Index/Index.h

@@ -25,6 +25,7 @@ namespace index {
 void indexDeclContext(DeclContext *DC, IndexDataConsumer &consumer);
 void indexSourceFile(SourceFile *SF, IndexDataConsumer &consumer);
 void indexModule(ModuleDecl *module, IndexDataConsumer &consumer);
+bool printDisplayName(const swift::ValueDecl *D, llvm::raw_ostream &OS);
 
 } // end namespace index
 } // end namespace swift

lib/Index/Index.cpp

@@ -73,7 +73,7 @@ printArtificialName(const swift::AbstractStorageDecl *ASD, AccessorKind AK, llvm
   llvm_unreachable("Unhandled AccessorKind in switch.");
 }
 
-static bool printDisplayName(const swift::ValueDecl *D, llvm::raw_ostream &OS) {
+bool index::printDisplayName(const swift::ValueDecl *D, llvm::raw_ostream &OS) {
   if (!D->hasName() && !isa<ParamDecl>(D)) {
     auto *FD = dyn_cast<AccessorDecl>(D);
     if (!FD)

lib/Refactoring/LocalRename.cpp

@@ -194,21 +194,13 @@ swift::ide::getRenameInfo(ResolvedCursorInfoPtr cursorInfo) {
 }
 
 class RenameRangeCollector : public IndexDataConsumer {
-  StringRef usr;
+  const ValueDecl *declToRename;
   std::unique_ptr<StringScratchSpace> stringStorage;
   std::vector<RenameLoc> locations;
 
 public:
-  RenameRangeCollector(StringRef usr)
-      : usr(usr), stringStorage(new StringScratchSpace()) {}
-
-  RenameRangeCollector(const ValueDecl *D)
-      : stringStorage(new StringScratchSpace()) {
-    SmallString<64> SS;
-    llvm::raw_svector_ostream OS(SS);
-    printValueDeclUSR(D, OS);
-    usr = stringStorage->copyString(SS.str());
-  }
+  RenameRangeCollector(const ValueDecl *declToRename)
+      : declToRename(declToRename), stringStorage(new StringScratchSpace()) {}
 
   RenameRangeCollector(RenameRangeCollector &&collector) = default;
 
@@ -228,7 +220,7 @@ class RenameRangeCollector : public IndexDataConsumer {
   bool finishDependency(bool isClangModule) override { return true; }
 
   Action startSourceEntity(const IndexSymbol &symbol) override {
-    if (symbol.USR != usr) {
+    if (symbol.decl != declToRename) {
       return IndexDataConsumer::Continue;
     }
     auto loc = indexSymbolToRenameLoc(symbol);

test/SourceKit/RelatedIdents/two_invalid_decls_with_same_base_name.swift

@@ -0,0 +1,6 @@
+struct Foo {
+  func bar(body: Invalid) {}
+
+// RUN: %sourcekitd-test -req=related-idents -pos=%(line + 1):8 %s -- %s
+  func bar(ignoreCase: Bool, body: Invalid) {}
+}