Async function declared in $derived() results in HierarchyRequestError on hydration from SSR #16904
Description
Describe the bug
It seems that #16806 introduced a regression for traditional {#await} blocks. Calling an async function declared with $derived results in hydration from SSR failing catastrophically.
Reproduction
On StackBlitz due to specifically happening in hydration
Logs
Uncaught (in promise) HierarchyRequestError: Failed to execute 'appendChild' on 'Node': This node type does not support this method.System Info
System: OS: Linux 5.0 undefined CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz Memory: 0 Bytes / 0 Bytes Shell: 1.0 - /bin/jsh Binaries: Node: 20.19.1 - /usr/local/bin/node Yarn: 1.22.19 - /usr/local/bin/yarn npm: 10.8.2 - /usr/local/bin/npm pnpm: 8.15.6 - /usr/local/bin/pnpm npmPackages: svelte: 5.39.4 => 5.39.4Severity
blocking an upgrade