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You can try out this pull request locally by installing Rollup via

npm install rollup/rollup#fix/conditional-expression-literal-value

Notice: Ensure you have installed the latest stable Rust toolchain. If you haven't installed it yet, please see https://www.rust-lang.org/tools/install to learn how to download Rustup and install Rust.

or load it into the REPL:
https://rollup-9g9uwpn0l-rollup-js.vercel.app/repl/?pr=6009

Performance report

• BUILD: 7044ms, 822 MB
  • initialize: 0ms, 24.7 MB
  • generate module graph: 2641ms, 631 MB
    • generate ast: 1406ms, 620 MB
  • sort and bind modules: 402ms, 685 MB
  • mark included statements: 3997ms, 822 MB
    • treeshaking pass 1: 2331ms, 819 MB
    • treeshaking pass 2: 474ms, 849 MB
    • treeshaking pass 3: 406ms, 823 MB
    • treeshaking pass 4: 390ms, 854 MB
    • treeshaking pass 5: 387ms, 822 MB
• GENERATE: 894ms (+94ms, +11.7%), 921 MB
  • initialize render: 0ms, 911 MB (+9%)
  • generate chunks: 182ms (+133ms, +268.6%), 832 MB
    • optimize chunks: 0ms, 894 MB (+9%)
  • render chunks: 638ms (-74ms, -10.4%), 895 MB
  • transform chunks: 19ms, 921 MB
  • generate bundle: 0ms, 921 MB

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.79%. Comparing base (b7c7c11) to head (c037425).
Report is 1 commits behind head on master.

@@           Coverage Diff           @@
##           master    #6009   +/-   ##
=======================================
  Coverage   98.79%   98.79%           
=======================================
  Files         270      270           
  Lines       10569    10575    +6     
  Branches     2819     2821    +2     
=======================================
+ Hits        10442    10448    +6     
  Misses         87       87           
  Partials       40       40           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

Hi @lukastaegert, do you have time to make a patch release? It seems that quite a few people are currently running into this issue.

haha 😂

This PR has been released as part of [email protected]. You can test it via npm install rollup.

For me it did not resolve.

When I run a build in my vite app, I still get:

[vite-plugin-pwa:build] [plugin vite-plugin-pwa:build] There was an error during the build:
Cannot add property 0, object is not extensible
Additionally, handling the error in the 'buildEnd' hook caused the following error:
Cannot add property 0, object is not extensible

For me it did not resolve.

When I run a build in my vite app, I still get:

[vite-plugin-pwa:build] [plugin vite-plugin-pwa:build] There was an error during the build:

Cannot add property 0, object is not extensible

Additionally, handling the error in the 'buildEnd' hook caused the following error:

Cannot add property 0, object is not extensible

Could you check which version of Rollup is installed？

For me it did not resolve.
When I run a build in my vite app, I still get:
[vite-plugin-pwa:build] [plugin vite-plugin-pwa:build] There was an error during the build:
Cannot add property 0, object is not extensible
Additionally, handling the error in the 'buildEnd' hook caused the following error:
Cannot add property 0, object is not extensible

Could you check which version of Rollup is installed？

installed is 4.45.0, trying to set it to 4.45.1 in package json resolves to:

npm warn Found: [email protected]
npm warn node_modules/rollup
npm warn dev rollup@"^4.45.1" from the root project
npm warn 5 more (@rollup/plugin-node-resolve, @rollup/plugin-terser, ...)
npm warn
npm warn Could not resolve dependency:
npm warn peerOptional rollup@"2.x || 3.x || 4.x" from [email protected]
npm warn node_modules/rollup-plugin-visualizer
npm warn dev rollup-plugin-visualizer@"^6.0.3" from the root project
npm error code ETARGET
npm error notarget No matching version found for rollup@^4.45.1.
npm error notarget In most cases you or one of your dependencies are requesting
npm error notarget a package version that doesn't exist.

I've verified this does indeed work again in 4.45.1. Not sure what @nipkai is having issues with, but looks like you couldn't find it when you tried to install it for some reason. Works for me locally, though.

Thanks for resolving this issue for us!

Works now as well! I did not change anything :D