Sequence activation bar operator --++ with mixed usages of activate/deactivate results in stacked bars.

Question

This doesn't look intended:

@startuml
alice -> bob: hello
activate bob #gold
bob -> alice --++ #gold: you too
activate alice #LightSkyBlue
alice -> bob: step
deactivate alice
alice -> bob: step
deactivate alice
@enduml

It seems to be the mixture of a regular activated bob with the new --++ operator deactivation ob bob and double activation of alice.

Answer 1

Hello A.,

From documentation here:

• https://plantuml.com/en/sequence-diagram#35480215b426d170

Yes, it doesn't yet intended (it not a bug), but a wanted feature, see also:

• https://forum.plantuml.net/9573/please-shortcut-syntax-deactivate-source-activate-target

If that can help,
Regards,
Th.

Answer 2

Hello A.,

Now, this new functionality is developed (on v1.2021.2), and your observation it is a side effect:

Then a recommendation will be now to not mix the two forms:

• either old form (with color change):

• either new form (without color change due to [only one color on the line]):

bob -> alice --++ #gold: you too

If that can help,
Regards,
Th.