TypeError: Cannot read properties of undefined (reading 'indexOf') #5084
Description
Rollup Version
3.27.1
Operating System (or Browser)
macOS
Node Version (if applicable)
No response
Link To Reproduction
https://stackblitz.com/edit/rollup-repro-ughg9c?file=package.json
Expected Behaviour
npm run build succeeds.
Actual Behaviour
Lazy computing decoded mappings in #5075 seems to cause undefined mappings at vite build time in SvelteKit.
https://github.com/janosh/elementari/actions/runs/5754572660/job/15600143441#step:6:18
vite v4.4.8 building SSR bundle for production...
transforming...
✓ 5 modules transformed.
✓ built in 556ms
Cannot read properties of undefined (reading 'indexOf')
error during build:
TypeError: Cannot read properties of undefined (reading 'indexOf')
at indexOf (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:91:26)
at decode (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:54:22)
at get mappings [as mappings] (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:13281:37)
at decodedSourcemap (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:13254:13)
at file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:13997:104
at Array.map (<anonymous>)
at Module.setSource (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:13997:46)
at ModuleLoader.addModuleSource (file:///home/runner/work/elementari/elementari/node_modules/rollup/dist/es/shared/node-entry.js:24523:[20](https://github.com/janosh/elementari/actions/runs/5754572660/job/15600143441#step:6:21))