options.filename undefined in 2.13.1

[onip]

ERROR in ./src/uis/control/App.svelte
Module build failed (from ./node_modules/svelte-loader/index.js):
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
    at assertPath (path.js:39:11)
    at basename (path.js:1294:5)
    at sanitize (/home/onip/workspace/pantobot3d/calibration-ui/node_modules/svelte-loader/index.js:57:9)
    at Object.module.exports (/home/onip/workspace/pantobot3d/calibration-ui/node_modules/svelte-loader/index.js:134:36)

$ npm ls svelte
calibration-ui@1.0.0 /home/onip/workspace/pantobot3d/calibration-ui
└── svelte@2.16.1 

the issue seems to have originated from commit f919ccf0c9b9d3d615269f54c33ff3f3086ef1d0

[Rich-Harris]

whoops! thanks, should be fixed in 2.13.2 by 9f9df9d