---
title: MARKLESS_ASYNC_POST_AWAIT_READ
description: "An async computed() reads state after an await."
sidebar: { hidden: true }
search: { keywords: ["ASYNC_POST_AWAIT_READ","async post await read","markless error"] }
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---

**Error** from the compiler, while it builds your `.tsrx` files.

## What happened

Markless records which state an async `computed()` reads before its first `await`. A read after the `await` is invisible to it.

Markless prints the message, the reason, and a suggestion:

```text
MARKLESS_ASYNC_POST_AWAIT_READ: Cannot read "<source>" after await in async computed "<computedName>". Snapshot the value before awaiting.
Async computed dependency keys are captured before the first await. Reading graph state after suspension would make revalidation and resume depend on hidden async timing.
Read the graph value before the first await, or split post-await formatting into a separate sync computed().
https://markless.dev/errors/MARKLESS_ASYNC_POST_AWAIT_READ
```

Words in angle brackets change from case to case.

## How to fix it

Copy the value into a local before the first `await`. Use the local after it.

```tsrx
const details = computed(async ({ signal }) => {
	const q = name;
	return { title: await loadGreeting(q, signal) };
});
```

## Where it comes from

`@markless/compiler` raises this code. Source:

- [packages/compiler/src/passes/semantic-graph/diagnostics.ts](https://github.com/compiled-run/markless/blob/main/packages/compiler/src/passes/semantic-graph/diagnostics.ts)

Read [how to read a Markless error](/tooling/diagnostics), or go back to [all error codes](/errors).