---
title: Exit codes
description: What exit codes 0, 1, and 2 mean, and when a parse failure fails the run.
---

| Code | Meaning |
| --- | --- |
| `0` | The scan completed and no requested gate failed. |
| `1` | `--fail-above` or `--fail-regression` failed. |
| `2` | Usage, input, parsing, coverage, or output failed. |

Without a gate flag, poly-crap always exits `0`, however bad the scores. A
source file with a syntax error produces a warning and is skipped; the run
fails only when candidate files exist and none of them parse.