Merge pull request #64917 from DougGregor/thank-you-asan

Stop binding a constant reference to a temporary that goes away.

Author: swift-ci

lib/AST/ASTScopeCreation.cpp

@@ -270,7 +270,7 @@ ASTSourceFileScope::ASTSourceFileScope(SourceFile *SF,
     case MacroRole::Peer: {
       ASTContext &ctx = SF->getASTContext();
       SourceManager &sourceMgr = ctx.SourceMgr;
-      const auto &generatedSourceInfo =
+      auto generatedSourceInfo =
           *sourceMgr.getGeneratedSourceInfo(*SF->getBufferID());
 
       ASTNode node = ASTNode::getFromOpaqueValue(generatedSourceInfo.astNode);