`srcset` causes adapter-static build to fail

[johnknoop]

Describe the bug

I initially posted a comment in a separate issue but didn't get any response from that, so I'm creating a separate one instead.

Since upgrading from version 1.0.0-next.224 of SvelteKit, I can no longer have srcset attributes with multiple paths (which is the whole point with srcset attributes.

Current versions:

@sveltejs/kit: 1.9.3
@sveltejs/adapter-static: 2.0.1
svelte: 3.55.1
vite: 4.1.4

The versions I had before, where it worked:

@sveltejs/kit: 1.0.0-next.224
@sveltejs/adapter-static: 1.0.0-next.26
svelte: 3.48.0
vite: 2.7.13

Reproduction

<img
    srcset="/order_thumbnail_400px.png,
            /order_thumbnail_800px.png 1.5x"
    src="/order_thumbnail_400px.png"
    alt="" />

(Both png files are located in /static folder)

Expected result

A successful build

Observed result

Error: Not found: /order_thumbnail_400px.png,/order_thumbnail_800px.png
at resolve (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2711:18)
at resolve (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2586:34)
at #options.hooks.handle (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2755:59)
at respond (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2584:43)
file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:53
throw new Error(format(details));
^

Error: 404 /order_thumbnail_400px.png,/order_thumbnail_800px.png (linked from /)
at file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:53:12
at save (file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:355:4)
at visit (file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:204:3)

If I remove one of the paths from the srcset attribute:

<img
    srcset="/order_thumbnail_800px.png 1.5x"
    src="/order_thumbnail_400px.png"
    alt="" />

...then it builds successfully.

Logs

Error: Not found: /order_thumbnail_400px.png,/order_thumbnail_800px.png
at resolve (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2711:18)
at resolve (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2586:34)
at #options.hooks.handle (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2755:59)
at respond (file:///C:/work/hublinwebsite/.svelte-kit/output/server/index.js:2584:43)
file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:53
throw new Error(format(details));
^

Error: 404 /order_thumbnail_400px.png,/order_thumbnail_800px.png (linked from /)
at file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:53:12
at save (file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:355:4)
at visit (file:///C:/work/hublinwebsite/node_modules/@sveltejs/kit/src/core/postbuild/prerender.js:204:3)

System Info

System:
    OS: Windows 10 10.0.22000
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Memory: 12.78 GB / 31.73 GB
  Binaries:
    Node: 18.14.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.19 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 9.3.1 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.22000.120.0), Chromium (110.0.1587.63)
    Internet Explorer: 11.0.22000.120

Severity

blocking an upgrade

Additional Information

No response

[li6in9muyou]

I'd like to work on this issue.