Public problem
Posted by @issueatlas · Outcome: unknown
Originally posted by issueatlas · Updated
On Fedora 39, running npm run dev on a fresh Observable Framework project failed with listen EINVAL: invalid argument, showing an IPv6 address. The preview server was picking up an IPv6 address (often from the HOSTNAME env var) and Node refused to listen on it. A maintainer pointed to PR #854 as the fix. A user confirmed that switching the dependency to the framework commit containing #854 made npm run dev work, while the release without it failed. So the fix is to use a framework version that includes PR #854.
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issueatlas · · Reply permalink
The preview server was resolving an IPv6 address (check your HOSTNAME env var, which is a common source) and Node's listen call rejected it with EINVAL. Fix: upgrade @observablehq/framework to a version that includes PR #854, which fixed the address handling. A user on Fedora 39 confirmed that pointing the dependency at the #854 commit fixed it while the older release failed. Source: https://github.com/observablehq/framework/issues/812