Error: Parse error on line NaN: Unexpected 'FOR'

[aysenz]

_this is a "test.mammouth" file_

{{ _numlist = [1, 2, 3, 4, 5] _squares = (square(num) for num in numlist) }}

_in terminal_ $gulp [23:00:31] Requiring external module coffee-script/register [23:00:33] Using gulpfile ~/lhost/mammouth/gulpfile.coffee [23:00:33] Starting 'mammouth'... [23:00:33] Starting 'watch'... [23:00:33] Finished 'watch' after 16 ms [23:00:33] { [Error: Parse error on line NaN: Unexpected 'FOR'] name: 'Error', message: 'Parse error on line NaN: Unexpected \'FOR\'', stack: 'Error: Parse error on line NaN: Unexpected \'FOR\'\n at Object.parseError (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/mammouth/lib/parser.js:466:15)\n at Object.parse (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/mammouth/lib/parser.js:531:22)\n at Object.module.exports.parse (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/mammouth/lib/mammouth.js:23:26)\n at Object.module.exports.compile (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/mammouth/lib/mammouth.js:27:19)\n at DestroyableTransform.transform as _transform\n at DestroyableTransform.Transform._read (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:184:10)\n at DestroyableTransform.Transform._write (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:12)\n at doWrite (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:237:10)\n at writeOrBuffer (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:227:5)\n at DestroyableTransform.Writable.write (/home/aysen/lhost/mammouth/node_modules/gulp-mammouth/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:194:11)\n at write (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:623:24)\n at flow (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:632:7)\n at DestroyableTransform.pipeOnReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_streamreadable.js:664:5)\n at emitNone (events.js:67:13)\n at DestroyableTransform.emit (events.js:166:7)\n at emitReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:448:10)\n at emitReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:444:5)\n at readableAddChunk (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:187:9)\n at DestroyableTransform.Readable.push (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:149:10)\n at DestroyableTransform.Transform.push (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:145:32)\n at afterTransform (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:101:12)\n at TransformState.afterTransform (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:79:12)\n at DestroyableTransform.noop as _transform\n at DestroyableTransform.Transform._read (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:184:10)\n at DestroyableTransform.Transform._write (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:12)\n at doWrite (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:237:10)\n at writeOrBuffer (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:227:5)\n at DestroyableTransform.Writable.write (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:194:11)\n at write (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:623:24)\n at flow (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:632:7)\n at DestroyableTransform.pipeOnReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_streamreadable.js:664:5)\n at emitNone (events.js:67:13)\n at DestroyableTransform.emit (events.js:166:7)\n at emitReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:448:10)\n at emitReadable (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:444:5)\n at readableAddChunk (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:187:9)\n at DestroyableTransform.Readable.push (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:149:10)\n at DestroyableTransform.Transform.push (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:145:32)\n at afterTransform (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:101:12)\n at TransformState.afterTransform (/home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:79:12)\n at /home/aysen/lhost/mammouth/node_modules/gulp/node_modules/vinyl-fs/lib/src/getContents/bufferFile.js:12:5\n at FSReqWrap.readFileAfterClose as oncomplete\n', showStack: false, showProperties: true, plugin: 'gulp-mammouth' }

[btwael]

gulp-mammouthuse an unsupported mammouth version (2.0.1), using for as expression is supported since version 3, so edit package.jsonof gulp-mammouth module to

...
        "mammouth": "latest",
...