Stream: helpdesk (published)

Topic: ✔ World age advance in tests

DrChainsaw (Nov 21 2025 at 16:25):

I have a testset for some code generation code which used to work in 1.11 but now fails in 1.12. I realize it might have worked for the wrong reasons before, but I guess now is as good a time to fix it as ever.

The overall structure of the test is like this

@testset "Test Concept XX" begin
     # Do some setup
     @eval module TestModule end # Code will be generated into this module to not mess up other modules (eg Main)

       @testset "Test generation of $x" for x in (....)
            try
                # Test that user gets a nice warning if they ever end up doing this
                 function badfun()
                         generate_code!(TestModule, x)
                         # Call code which uses result of  the above
                         make_use_of_generated_stuff(TestModule)
                 end

                @test_logs (:warn, "Warning about generated code") badfun()
                # In Julia 1.11 it seems the world age had advanced here, but in 1.12 it hasn't
                 @test make_use_of_generated_stuff(TestModule) == expected_result

            finally
                  clear_some_global_caches_in_tested_package()
            end
       end
end

The above is in a file which is included from runtests.jl inside another testcase:

@testset "Test Concepts" begin
        include("the/above/file.jl")
end

Is there any place in this where it is safe to assume that the world age has advanced in 1.12?

Eric Hanson (Nov 21 2025 at 16:29):

https://docs.julialang.org/en/v1/base/base/#include mentions Core.@latestworld, but Core.@latestworld itself doesn't have docs. But it sounds like placing that where you want the world age to advance might work?

Mason Protter (Nov 21 2025 at 17:05):

You can just use invokelatest too, right?

DrChainsaw (Nov 21 2025 at 17:23):

Thanks alot. Both Core.@latestworld and invokelatest worked. I guess invokelatest will also work on earlier versions and I think it is enough for the test to be valid (or else it was not a good test to begin with).

Notification Bot (Nov 21 2025 at 17:23):

DrChainsaw has marked this topic as resolved.

Last updated: Nov 27 2025 at 04:44 UTC