TypeError: Cannot add property _layers, object is not extensible #205
Description
Environment
- Operating System: Linux
- Node Version: v20.17.0
- Package Manager: pnpm@9.11.0
Reproduction
https://stackblitz.com/github/nuxt-modules/tailwindcss/tree/c12-refactor
Run pnpm test basic
Describe the bug
Getting an error: TypeError: Cannot add property _layers, object is not extensible
This is when the config is equal to [Module: null prototype] { } and I have passed a custom merger as well that is based of defu (also creates copy of objects using klona). I'm not 100% sure where the issue may be lying in this case.
Additional context
In the test fixture, I am trying to load tailwind.config.js that uses CommonJS syntax but it loadConfig / jiti doesn't seem to be picking that 🤔
It'll work if the extension is .cjs or the file uses ESM, but not all users may have that scenario.
Logs
TypeError: Cannot add property _layers, object is not extensible
❯ extendConfig node_modules/.pnpm/c12@2.0.1_magicast@0.3.5/node_modules/c12/dist/shared/c12.CLRr5qYj.cjs:237:18
❯ loadConfig node_modules/.pnpm/c12@2.0.1_magicast@0.3.5/node_modules/c12/dist/shared/c12.CLRr5qYj.cjs:205:11
❯ Object.loadConfigs src/internal-context/load.ts:119:27
❯ src/module.ts:93:23
❯ initNuxt node_modules/.pnpm/nuxt@3.13.2_@opentelemetry+api@1.9.0_@parcel+watcher@2.4.1_@types+node@20.11.0_encoding@0.1.1_p5ecgqo4fgnxalrrwhgsvb34r4/node_modules/nuxt/dist/index.mjs:4510:3
❯ loadNuxt node_modules/.pnpm/nuxt@3.13.2_@opentelemetry+api@1.9.0_@parcel+watcher@2.4.1_@types+node@20.11.0_encoding@0.1.1_p5ecgqo4fgnxalrrwhgsvb34r4/node_modules/nuxt/dist/index.mjs:4673:5
❯ Module.loadNuxt node_modules/.pnpm/@nuxt+kit@3.13.2_magicast@0.3.5_rollup@4.18.0_webpack-sources@3.2.3/node_modules/@nuxt/kit/dist/index.mjs:2664:19
❯ loadFixture node_modules/.pnpm/@nuxt+test-utils@3.14.2_h3@1.13.0_happy-dom@15.7.4_magicast@0.3.5_nitropack@2.9.7_@openteleme_3tgsw6odecy35hpfofogcjtniu/node_modules/@nuxt/test-utils/dist/shared/test-utils.CaqvQLs_.mjs:103:16
101| });
102| const buildDir = ctx.nuxt.options.buildDir;
103| if (!existsSync(buildDir)) {
| ^
104| await promises.mkdir(buildDir, { recursive: true });
105| ctx.teardown = ctx.teardown || [];
❯ setup2 node_modules/.pnpm/@nuxt+test-utils@3.14.2_h3@1.13.0_happy-dom@15.7.4_magicast@0.3.5_nitropack@2.9.7_@openteleme_3tgsw6odecy35hpfofogcjtniu/node_modules/@nuxt/test-utils/dist/shared/test-utils.CaqvQLs_.mjs:180:7