Error after updating meteor

Hello, I just updated Meteor to 1.4.2.6. And since then, I have this message at the launch of the application:

Errors prevented startup:
While processing files with ecmascript (for target web.browser):
/home/pierre/.meteor/packages/ecmascript/.0.6.2.1cc5yrq++os+web.browser+web.cordova/plugin.compile-ecmascript.os/npm/node_modules/meteor/babel-compiler/node_modules/ast-types/lib/types.js:663:19: did not recognize object of type "NumericLiteralTypeAnnotation"

I do not understand what is going on. Can someone help me. thank you