TypeError: Cannot set property 'sign' of undefined

TypeError: Cannot set property 'sign' of undefined
at module.exports (/usr/local/lib/node_modules/uni-migration/lib/index.js:1:669)
at Object. (/usr/local/lib/node_modules/uni-migration/bin/uni-migration.js:44:3)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Function.Module.runMain (module.js:676:10)
at startup (bootstrap_node.js:187:16)
at bootstrap_node.js:608:3

Start by examining the failing stack frames in lib/index.js and the call from bin/uni-migration.js. Reproduce the reported TypeError, identify the undefined value involved, and verify that the same migration entry point completes without the error.

Written by the indexing model from the issue text.