TypeError: dependentEntriesByModule.get is not a function during chunk generation (dynamic imports) #6305
Description
Rollup Version
4.59.0
Operating System (or Browser)
Linux
Node Version (if applicable)
20.19.3
Link To Reproduction
https://github.com/JoaoBrlt/rollup-dynamic-import-bug
Expected Behaviour
The build should succeed.
Actual Behaviour
The build fails with the following error:
✗ Build failed in 15.94s
error during build:
dependentEntriesByModule.get is not a function or its return value is not iterable
at getDynamicallyDependentEntriesByDynamicEntry (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:19597:58)
at analyzeModuleGraph (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:19550:52)
at getChunkAssignments (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:19448:200)
at Bundle.generateChunks (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:20693:19)
at async Bundle.generate (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:20607:28)
at async file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:23558:27
at async catchUnfinishedHookActions (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/rollup@4.59.0/node_modules/rollup/dist/es/shared/node-entry.js:22925:16)
at async buildEnvironment (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.37/node_modules/vite/dist/node/chunks/config.js:33543:64)
at async Object.build (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.37/node_modules/vite/dist/node/chunks/config.js:33900:19)
at async Object.buildApp (file:///home/joaobrlt/projects/rollup-dynamic-import-bug/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.37/node_modules/vite/dist/node/chunks/config.js:33897:153)
ELIFECYCLE Command failed with exit code 1.