Remove assumption in Dart_GetClosureInfo that func->cls->script = func->script,which was broken in …

runtime/vm/debugger_api_impl.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
@@ skipping 679 matching lines @@
   if (signature != NULL) {
     *signature = Api::NewHandle(isolate, func.UserVisibleSignature());
   }
 
   if (location != NULL) {
     if (func.token_pos() >= 0) {
       const Class& cls = Class::Handle(func.origin());
       ASSERT(!cls.IsNull());
       const Library& lib = Library::Handle(isolate, cls.library());
       ASSERT(!lib.IsNull());
-      const Script& script = Script::Handle(cls.script());
+      // Note func.script() is not the same as cls.script() for eval functions.
+      const Script& script = Script::Handle(func.script());
       ASSERT(!script.IsNull());
       location->script_url = Api::NewHandle(isolate, script.url());
       location->library_id = lib.index();
       location->token_pos = func.token_pos();
     } else {
       location->script_url = Api::NewHandle(isolate, String::null());
       location->library_id = -1;
       location->token_pos = -1;
     }
   }
@@ skipping 269 matching lines @@
   return Api::CastIsolate(isolate);
 }
 
 
 DART_EXPORT Dart_IsolateId Dart_GetIsolateId(Dart_Isolate dart_isolate) {
   Isolate* isolate = reinterpret_cast<Isolate*>(dart_isolate);
   return isolate->debugger()->GetIsolateId();
 }
 
 }  // namespace dart