Polymer Build: js-transform: Unable to optimize...

[busynest]

For the past few weeks, all new project do not build properly. must have come in the latest updates.

info: (es5-bundled) Building...
warn: js-transform: Unable to optimize C:\Users\BusyNest\Desktop\dev\tp-web\src\components\my-app.js
{ err: 'Cannot read property 'isIfStatement' of null' }
info: (es5-bundled) Build complete!

[Westbrook]

You can see this occur by taking a clean clone of pwa-starter-kit switching to template-typescript and running yarn build:static.

After a quick review I'm not seeing any issues with the actual code output, but it's certainly an annoyance.

[usergenic]

#3388 should fix this.

[usergenic]

tl;dr - it's a problem with babel-preset-minify so we disable a few plugins it uses to work around the issue.

[usergenic]

Published [email protected] and [email protected] fixing this issue.