The Android and Windows-portable jobs fetched the existing updater
manifest with `curl -sL .../latest.json -o latest.json`. Without `-f`,
curl writes the server's 404 body ("Not Found") into the file and exits
0, after which `gh release upload --clobber` uploads that invalid JSON as
the release's latest.json.
tauri-action's updater step then downloads the existing latest.json and
runs `JSON.parse(...)` to merge new platforms in. Parsing "Not Found"
throws `Unexpected token 'N', "Not Found" is not valid JSON`, failing
every build-tauri matrix leg after its bundles were already uploaded.
Use `curl -fsSL` so an HTTP error fails the step instead of writing the
error body, and validate the download with `jq empty` before merging, so
a corrupt manifest can never be clobbered onto the release again.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
53fe8c2683