Realm Crashing on iOS 18 with Xcode 26 and Generable Macro. Crash on iOS 16 with Xcode 26 without any Generable Macro

[yasheedv]

How frequently does the bug occur?

Always

Description

Realm crashing at RLMSchema.m line number 300, malloc_ptr classes(objc_copyClassList(&numClasses), &free); with the error Task 4: EXC_BAD_ACCESS (code=1, address=0x0).

The crash is happening when Im using latest Generable Macro data model in the project.

Im running the project from Xcode 26 with an iOS 18 device.

I removed all the Generable Macro and the app is crashing in iOS 16.

Stacktrace & log output

Can you reproduce the bug?

Always

Reproduction Steps

Create a project with minimum target below iOS 26. Add a model with Generable macro. Run the project in iOS 18 device from Xcode 26

Version

20.0.3

What Atlas Services are you using?

Local Database only

Are you using encryption?

No

Platform OS and version(s)

iOS 18

Build environment

Xcode version: 26 beta 7
Dependency manager and version: SPM, 20.0.3

[alfredcc]

crash on iOS 16 when build with Xcode 26 RC

[yasheedv]

The same crash is happening below iOS 18 even without using any Generable macro

[yasheedv]

@alfredcc did you find any solution?

[alfredcc]

@yasheedv, we have moved to GRDB.

[alfredcc]

It looks like no one is maintaining this library anymore, so it’s better to migrate sooner. @yasheedv

[yasheedv]

@alfredcc, yeah will consider that. Our app is very large and contains at least 100 Objects

[RobeGarcia]

Did you guys found any solution for the problem? I cannot fix it and is crashing my app :(