How to debug "type Nothing has no field color"

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1

I hit the following bug: Switch on the tutorial project · Issue #8 · bradcarman/ModelingToolkitDesigner.jl · GitHub

But the author of the package cannot reproduce it. How can we find the reason for this bug?

Can anybody else reproduce it?

2

The stack trace of albheim in that issue say that the problem is on line 578 in src/ModelingToolkitDesigner.jl on version v1.0.0: https://github.com/bradcarman/ModelingToolkitDesigner.jl/blob/f56140e8b4c46583f71ab8d694bff64376cddde5/src/ModelingToolkitDesigner.jl#L569-L579

Looks like there is a isnothing check missing:

if !isnothing(selected_component)
    selected_component.color[] = :pink
else
    all_connectors =
        vcat([s.connectors for s in design.components]...)
    selected_connector = filtersingle(
        c -> is_tuple_approx(c.xy[], (x, y); atol = 1e-3),
        all_connectors,
    )
    selected_connector.color[] = :pink # line nr. 578
end
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3

Thanks a lot! :grinning:

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