Index: clang/lib/Driver/ToolChains/Darwin.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Darwin.cpp
+++ clang/lib/Driver/ToolChains/Darwin.cpp
@@ -697,8 +697,13 @@
     }
   }
 
-  ResponseFileSupport ResponseSupport = ResponseFileSupport::AtFileUTF8();
-  if (Version[0] < 607) {
+  ResponseFileSupport ResponseSupport;
+  if (LinkerIsLLDDarwinNew) {
+    // Xcode12's ld64 added support for @response files, but it's crashy:
+    // https://openradar.appspot.com/radar?id=4933317065441280
+    // FIXME: Pass this for ld64 once it no longer crashes.
+    ResponseSupport = ResponseFileSupport::AtFileUTF8();
+  } else {
     // For older versions of the linker, use the legacy filelist method instead.
     ResponseSupport = {ResponseFileSupport::RF_FileList, llvm::sys::WEM_UTF8,
                        "-filelist"};