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psalm/docs/running_psalm/issues/Trace.md

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# Trace
Not really an issue. Just reports the type of a variable when using
[`@psalm-trace`](../annotating_code/supported_annotations.md#psalm-trace).
```php
<?php
/** @psalm-trace $x */
$x = getmypid();
```
## How to fix
Use it for debugging purposes, not for production