Kumar Ujjawal fc813af4c8
Better error handling for negative integer exponents in ** operator (#15882)
**Title**: Better error handling for negative integer exponents in `**`
operator

---

### Bug Fix

This PR addresses an issue where attempting to raise an integer to a
negative power (e.g. `10 ** -1`) incorrectly triggered an
`OperatorOverflow` error. This behavior was misleading since the
overflow isn't actually the root problem — it's the unsupported
operation of raising integers to negative powers.

---

###  Fix Summary

* Updated `Value::pow` to:

  * Check for negative exponents when both operands are integers.
* Return a `ShellError::IncorrectValue` with a helpful message guiding
users to use floating point values instead.

#### Example:

```bash
> 10 ** -1
Error: nu:🐚:incorrect_value

  × Incorrect value.
   ╝─[entry #2:1:4]
 1 │ 10 ** -1
   ·    ─┬┬
   ·     │╰── encountered here
   ·     ╰── Negative exponent for integer power is unsupported; use floats instead.
```

---

### Testing

Manual testing:

* `10 ** -1` → now returns a clear and appropriate `IncorrectValue`
error.
* `10.0 ** -1`, `10 ** -1.0`, etc. continue to work as expected.

---

### Related

Fixes #15860



---------

Co-authored-by: Kumar Ujjawal <kumar.ujjawal@greenpista.com>
2025-06-04 10:06:41 +02:00
..
2025-05-13 16:49:30 +02:00
2021-09-02 13:29:43 +12:00

nu-protocol

The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.