Bundling fails due to json parse issue

[moso80]

Hi,

I sometimes get this error when i save a script- or sass-file:
Unhandled rejection SyntaxError: Unexpected end of JSON input
at JSON.parse (:null:null)
at D:\develop\client\src\Web\node_modules\gulp-bundle-assets\lib\results\index.js:110:49
at tryCatcher (D:\develop\client\src\Web\node_modules\bluebird\js\release\util.js:16:23)
at Promise._settlePromiseFromHandler (D:\develop\client\src\Web\node_modules\bluebird\js\release\promise.js:502:31)
at Promise._settlePromise (D:\develop\client\src\Web\node_modules\bluebird\js\release\promise.js:559:18)
at Promise._settlePromise0 (D:\develop\client\src\Web\node_modules\bluebird\js\release\promise.js:604:10)
at Promise._settlePromises (D:\developclient\src\Web\node_modules\bluebird\js\release\promise.js:683:18)
at Promise._fulfill (D:\develop\client\src\Web\node_modules\bluebird\js\release\promise.js:628:18)
at D:\develop\client\src\Web\node_modules\bluebird\js\release\nodeback.js:42:21
at D:\develop\client\src\Web\node_modules\gulp-bundle-assets\node_modules\graceful-fs\graceful-fs.js:78:16
at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:528:3)

I can't find any pattern of when this error accours.

gulp-task:
gulp.task('watch',
function () {
gbundle.watch({
configPath: path.join(__dirname, '/bundle.config.js'),
results: {
dest: path.join(__dirname, '/bundles/'),
pathPrefix: '/bundles/',
fileName: 'bundle.result',
unprocessedOutputPathPrefix: "/",
sortUnprocessedOutput: false
},
dest: path.join(__dirname, '/bundles/')
});
});

Example of bundle:
main: {
scripts: [
config.paths.globalScripts
],
styles: [
config.paths.baseLessFile,
config.paths.baseSassFile,
config.paths.cssFiles,
"!Styles/admin/*.css"
],
options: {
uglify: prodLikeEnvs,
minCSS: prodLikeEnvs,
watch: {
styles: config.paths.globalStyles,
scripts: config.paths.globalScripts
},
maps: false,
result: {
type: {
scripts: scriptResult
}
},
transforms: {
styles: styleTransforms
},
rev: prodLikeEnvs
}
}

Any idea whats causing this?