v2.7 validation error when integer starts with +

[cknv]

Initial Checks

• I confirm that I'm using Pydantic V2

Description

Parsing integers starting with unary plus (such as +1) fails to parse to an int using pydantic v2.7.0 - found it from a test that broke when trying to upgrade dependencies.
Unary minus, such as -1 works as expected.

Seems related to some int parsing changes mentioned in #9227

Example Code

from pydantic import BaseModel

class Message(BaseModel):
    recipient: int

Message(recipient="+1")

Python, Pydantic & OS Version

pydantic version: 2.7.0
        pydantic-core version: 2.18.1
          pydantic-core build: profile=release pgo=true
                 install path: /home/..../.venv/lib/python3.11/site-packages/pydantic
               python version: 3.11.8 (main, Feb 12 2024, 14:50:05) [GCC 13.2.1 20230801]
                     platform: Linux-6.8.5-arch1-1-x86_64-with-glibc2.39
             related packages: typing_extensions-4.11.0 fastapi-0.110.1 mypy-1.9.0
                       commit: unknown

[sydney-runkle]

@cknv,

Thanks for the report. Looks like it should be an easy fix in pydantic-core, I'll work on that for our patch release!

[cknv]

Since it seemed easy @sydney-runkle I gave it a shot in pydantic/pydantic-core#1272.

[sydney-runkle]

@cknv,

Amazing, great work. @davidhewitt left a small comment / suggestion - once you resolve that, we can merge :).