> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sifr.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# SIFR-INTERNAL-0001: Unclassified compiler panic after a panic boundary.

> Unclassified compiler panic after a panic boundary.

`SIFR-INTERNAL-0001` belongs to the **Internal compiler recovery** diagnostic family. It means: unclassified compiler panic after a panic boundary.

## Why It Happens

This diagnostic indicates compiler recovery from an internal invariant failure or missing recovery capability.

<Info>
  Use `sifr --explain SIFR-INTERNAL-0001` locally to see the renderer's exact message template and any machine-applicable suggestions for the compiler version you are running.
</Info>

## Erroneous Code

```text theme={null}
compiler emitted SIFR-INTERNAL-0001
```

## How To Fix It

Do not try to silence an internal diagnostic with user-code workarounds. Reduce the program and report it.

## Fixed Code

```text theme={null}
report the smallest reproducer with the Sifr version and diagnostic output
```

## Details

| Field                  | Value                                                                   |
| ---------------------- | ----------------------------------------------------------------------- |
| Code                   | `SIFR-INTERNAL-0001`                                                    |
| Family                 | `INTERNAL`                                                              |
| Severity               | Error                                                                   |
| Stability              | stable                                                                  |
| Owner                  | `sifr_driver::diagnostics`                                              |
| Representative fixture | `crates/sifr_driver/src/tests/panic_boundary.rs::planned_internal_0001` |

See the [Error Codes index](/diagnostics/error-codes) for the complete catalog.