circular reference hangs getproperty_fallback

[t-bltg]

I have a complicated example where accessing a missing property of an object with nested circular references hangs indefinitely.

I narrowed this down to

ObjectOriented.jl/src/runtime.jl

Line 67 in d2ac014

error("unknown property '$name' for object '$self'")

One solution would be to limit the repr output:

function getproperty_fallback(self::T, name) where T
    rself = repr(self; context = (:limit => true, :compact => true))
    error("unknown property '$name' for object '$rself' of type '$T'")
end

Another would be to avoid displaying the object in the error message, and only display the type:

function getproperty_fallback(_::T, name) where T
    error("unknown property '$name' for object of type '$T'")
end

Unfortunately I couldn't come up with a reduced mwe for adding a regression test in CI, or as a simple reproducer.

[thautwarm]

Thanks for your PR. The limit repr seems not a solid solution.
Only showing type in the error looks fine to me, consider this:

julia> struct S
       end

julia> S().a
ERROR: type S has no field a

[t-bltg]

Thanks for merging !