# E4070

Unknown intrinsic. This intrinsic is not known to the MoonBit compiler.

Intrinsics are not intended for usage outside of `moonbitlang/core`. They are
subject to change without notice, and we highly recommend **against** using them.

## Erroneous example

```{literalinclude} /sources/error_codes/4070_error/top.mbt
:language: moonbit
```

## Suggestion

You probably want to use the `abort` function from `moonbitlang/core`:

```{literalinclude} /sources/error_codes/4070_fixed/top.mbt
:language: moonbit
```

If you really need to use the intrinsic, you can check the source code of
`moonbitlang/core` for further usage of the corresponding intrinsic.