node.js - Babel transform-async-to-module-method to Bluebird with ES6 maps -

we're trying use node.js 6.5.0 babel make async functions use bluebird instead of native v8 es6 promises:

our package.json contains following babel entries:

"devdependencies": {   "babel-cli": "^6.9.0",   "babel-plugin-transform-async-to-module-method": "^6.8.0",   "babel-plugin-transform-es2015-destructuring": "^6.9.0",   "babel-plugin-transform-es2015-modules-commonjs": "^6.14.0", } 

and .babelrc:

{   "plugins": [     "transform-es2015-modules-commonjs",     "transform-es2015-destructuring",     [       "transform-async-to-module-method",       {         "module": "bluebird",         "method": "coroutine"       }     ]   ] } 

however our async functions returning es6 map cause following error during execution:

a value [object map] yielded not treated promise

how fix this?

p.s. worked fine when async functions transformed generators transform-async-to-generator

here's sample code triggers same error:

function givemap() {   return new map(); }  void async function() {   await givemap(); }(); 

notice givemap isn't marked async (which actual problem).

this code run when using transform-async-to-generator, because map's yieldable generators:

function* () {   yield new map(); } 

however, when using transform-async-to-module-method, think code becomes similar this:

promise.coroutine(function* () {   yield new map(); }); 

this cause error, as explained here, because promise.coroutine() expects promises yielded.

so should on lookout functions return map, await'ed on, aren't mapped async.