TypeError: Cannot read properties of undefined (reading 'push')

[wooffie]

Try expand this string {{*(() and you will get

TypeError: Cannot read properties of undefined (reading 'push')
      at walk (lib/expand.js:98:15)
      at walk (lib/expand.js:103:9)
      at expand (lib/expand.js:110:24)
      at braces.expand (index.js:125:16)
      at equal (test/regression.js:8:27)
      at Context.<anonymous> (test/regression.js:436:5)
      at process.processImmediate (node:internal/timers:483:21)

[jonschlinkert]

Hi @wooffie thanks for creating the issue.

If you have a moment, if you could provide a minimal test case with the code/method, options, etc. and expected result that would be helpful, thanks.

[wooffie]

Hi!

I just expect to some library error, not reading undefined exception

docker run -it --rm node:24-alpine3.21 sh
mkdir src && cd src
npm init
npm install braces

node

const braces = require('braces');

braces('{{*(()', { expand: true })

Output:

Uncaught TypeError: Cannot read properties of undefined (reading 'push')
    at walk (/src/node_modules/braces/lib/expand.js:98:15)
    at walk (/src/node_modules/braces/lib/expand.js:103:9)
    at expand (/src/node_modules/braces/lib/expand.js:110:24)
    at braces.expand (/src/node_modules/braces/index.js:125:16)
    at braces.create (/src/node_modules/braces/index.js:163:14)
    at braces (/src/node_modules/braces/index.js:35:31)