core_list_dart/basic.html does not render, missing basic.html_bootstrap.dart.js

[ToddG]

REPRO:

git clone ...
pub get
pub build
pub serve

open chrome and nav to http://localhost:8080 select link "http://localhost:8080/core_list_dart/basic.html" wait... chrome browser displays nothing

server log is:

[web] GET /core_list_dart/basic.html → polymer_core_and_paper_examples|web/core_list_dart/basic.html
[web] GET /core_list_dart/packages/web_components/webcomponents.js → web_components|lib/webcomponents.js
[web] GET /core_list_dart/packages/polymer/src/build/log_injector.css → polymer|lib/src/build/log_injector.css
[web] GET /packages/polymer/src/js/polymer/polymer.min.js → polymer|lib/src/js/polymer/polymer.min.js
[web] GET /core_list_dart/packages/web_components/dart_support.js → web_components|lib/dart_support.js
[web] GET /packages/web_components/interop_support.js → web_components|lib/interop_support.js
[web] GET /packages/polymer/polymer.html.0.js → polymer|lib/polymer.html.0.js
[web] GET /packages/core_elements/src/core-selection/core-selection.html.0.js → core_elements|lib/src/core-selection/core-selection.html.0.js
[web] GET /packages/core_elements/src/polymer/polymer.html.0.js → core_elements|lib/src/polymer/polymer.html.0.js
[web] GET /core_list_dart/basic.html_bootstrap.dart → polymer_core_and_paper_examples|web/core_list_dart/basic.html_bootstrap.dart
[web] GET /core_list_dart/packages/browser/dart.js → browser|lib/dart.js
[web] GET /core_list_dart/basic.html_bootstrap.dart.js → Could not find asset polymer_core_and_paper_examples|web/core_list_dart/basic.html_bootstrap.dart.js.