After updating to versions 5.1.1 and 5.2.0, our codebase encounters exceptions when using absolute paths with the iterfind method of an ElementTree object. This behavior deviates from the expected, where a FutureWarning should be logged instead of raising an exception directly.

Expected Behavior:
Absolute paths should trigger a FutureWarning indicating that absolute paths should not be used without interrupting the execution flow.

Actual Behavior:
A SyntaxError exception is raised, which prevents further execution of the script.

Affected Methods:
ElementTree. iterfind raises an exception when used with an absolute path.

Environment tested with:
Python version: 3.12.2
lxml versions: 5.1.1 and 5.2.0

Attachments:
Python script to reproduce the exception.

Steps to Reproduce:
Use the lxml library version 5.1.1 or 5.2.0.
Run the following Python script:

```python
from lxml import etree

xml_string = """
<concept>
    <concept> Content 1</concept>
    <concept> Content 2</concept>
</concept>
"""

root_tree = etree.fromstrin g(xml_string) .getroottree( )
root_tree. iterfind( "//concept" )

```