Script streaming: don't produce (empty) cached data when debugger forces eagerness.

src/background-parsing-task.cc

Index: src/background-parsing-task.cc
diff --git a/src/background-parsing-task.cc b/src/background-parsing-task.cc
index c7602a7defd7b698f7268b4d4b3ada4c1c4f3e71..6ac743e1e52322422eb3190e79879236551496ad 100644
--- a/src/background-parsing-task.cc
+++ b/src/background-parsing-task.cc
@@ -25,6 +25,11 @@ BackgroundParsingTask::BackgroundParsingTask(
          options == ScriptCompiler::kNoCompileOptions);
   source->allow_lazy =
       !i::Compiler::DebuggerWantsEagerCompilation(source->info.get());
+
+  if (!source->allow_lazy && options_ == ScriptCompiler::kProduceParserCache) {
+    // Producing cached data while parsing eagerly is not supported.
+    options_ = ScriptCompiler::kNoCompileOptions;
+  }
   source->hash_seed = isolate->heap()->HashSeed();
 }