[debugger] Prevent shared function info duplicates

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 8eb6ff577308015c0ec7ee0e7984d04d4e43ac81..18564ac0f9578f51a9aac39ae5c7ac35f1ceb246 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1242,6 +1242,9 @@ bool Compiler::CompileForLiveEdit(Handle<Script> script) {
   Isolate* isolate = script->GetIsolate();
   DCHECK(AllowCompilation::IsAllowed(isolate));
 
+  // Get rid of old list of shared function infos.
+  script->set_shared_function_infos(Smi::FromInt(0));
+
   // Start a compilation.
   Zone zone(isolate->allocator());
   ParseInfo parse_info(&zone, script);