TypeError: null is not an object (evaluating 'socket.write')

[evelant]

I'm seeing the following crop up on my Sentry errors for my backend functions

TypeError: null is not an object (evaluating 'socket.write')
  File "/node_modules/postgres/src/connection.js", line 250, col 15, in nextWrite

running postgres 3.4.5 on Bun 1.2.10 in production. Sorry this issue is so light on details, I don't have many yet, but I wanted to put this here in case others are running into the same thing and we can figure out a solution together.

This seems to happen more or less randomly with postgres running on Bun on fly.io connected to a supabase database. Looking at the code I'm not sure how socket could become null unexpectedly. It's only assigned null in closed so I wouldn't expect it to be writing to the socket if closed were already called.

postgres/src/connection.js

Lines 249 to 254 in b0d8c8f

	function nextWrite(fn) {
	const x = socket.write(chunk, fn)
	nextWriteTimer !== null && clearImmediate(nextWriteTimer)
	chunk = nextWriteTimer = null
	return x
	}

I suspect maybe a bug in Bun, possibly with setImmediate? Any ideas about how this might happen?

I'm running postgres via Effect-ts sql-pg with the following options

    database: "postgres",
    url: Bun.env["SUPABASE_DB_URL"]!,
    fetchTypes: false,
    maxConnections: 15,
    idleTimeout: `30 seconds`,
    connectionTTL: `5 minutes`,
    prepare: false

If this is too little information to be helpful or useful feel free to close the issue. I'm sorry it's vague!