fix: Adjust recursive cycle detection to fix EXC_BAD_ACCESS

[maximkrouk]

Prev implementation triggered EXC_BAD_ACCESS exception on line 711

fieldPathIndexByTypeName[inputObj.name] = fieldPath.count could not access count since fieldPath was <uninitialized> even tho it clearly was

This commit wraps this logic into a class so createInputObjectCircularRefsValidator function no longer mutably captures a value type

Note

I also added .editorconfig file, this will help potential contributors to avoid switching their default formatting to "4-spaces" while working on graphql package

[maximkrouk]

Exception was raised here on fieldPath.count access, for some reason it was only reproducible in release builds, debug ones worked fine 💁‍♂️

[NeedleInAJayStack]

Thanks for the PR! Out of curiosity, in which version of Swift were you experiencing the issue?

[maximkrouk]

Thanks for the PR! Out of curiosity, in which version of Swift were you experiencing the issue?

I believe it was the latest one (seems to be 4.1.0), probably the issue might also be environment-related maybe specific swift versions work fine with it, but I managed to reproduce it both in local macos release build and linux build in docker container

From my Dockerfile:

ARG SWIFT_IMAGE=swift:6.3
ARG SWIFT_RUNTIME_IMAGE=swift:6.3-slim

From my local env (Xcode 26.4 Beta (17E5159k)):

swift --version
swift-driver version: 1.148.6 Apple Swift version 6.3 (swiftlang-6.3.0.119.2 clang-2100.0.119.1)
Target: arm64-apple-macosx26.0

[NeedleInAJayStack]

Hey, sorry about the delay. I'm also able to recreate this on Swift 6.3 in release mode, and I've validated that the fix works. It's kinda strange that it works - this seems like a bug with closure variable capture with the compiler, so I may raise it up to the Swift team as well.

I'm going to go ahead and merge this.

Thanks for contributing!