Sourcemap for '...bootstrap.min.css' points to missing source files

[jez9999]

Describe the bug

I have Vite configured to include CSS source maps in dev:

export default defineConfig({
    ...
    css: {
        devSourcemap: true
    },
    ...
});

My Vue site's code, in main.js, imports Bootstrap's CSS like this:

import 'bootstrap/dist/css/bootstrap.min.css';

When I load a page on the site, Vite gives me the message:

Sourcemap for "C:/Development/SPA/myApp/node_modules/bootstrap/dist/css/bootstrap.min.css" points to missing source files

React's default Webpack config doesn't seem to have the same problem when I import the Bootstrap minified CSS in the same way. I think it's because the Bootstrap bootstrap.min.css.map file, amongst its various source mappings, includes "dist/css/bootstrap.css". This is apparently supposed to be interpreted relative to the node_modules/bootstrap root, but Vite interprets it relative to bootstrap.min.css, and so it looks for bootstrap/dist/css/dist/css/bootstrap.css and doesn't find it, causing the error.

Reproduction

Configure Vite to include CSS sourcemaps, add Bootstrap to project, import it in Vue file

System Info

System:
    OS: Windows 10 10.0.19042
    CPU: (12) x64 Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz
    Memory: 2.06 GB / 15.64 GB
  Binaries:
    Node: 16.15.0 - C:\Program Files\nodejs\node.EXE
    npm: 8.5.5 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.423.0), Chromium (105.0.1343.33)
    Internet Explorer: 11.0.19041.1

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[sapphi-red]

related: #8411

[jez9999]

@sapphi-red I don't think that's the same problem, actually. That seems to be the browser trying to retrieve the sourcemap, whereas here it's Vite trying to inline the sourcemap and failing on one of the files.