[Newline] Possible regression bug (due to new newline management)?

[The-Lum]

Context

To follow:

• AddBoundaryTag not working with PlantUML 1.2025 plantuml-stdlib/C4-PlantUML#385
• https://forum.plantuml.net/19742/2025-produces-diagrams-wrong-styles-maybe-%25newline-related

Bug observed

• It seems there is a regression bug (due to new newline management)?

See all explanation of @kirchsth here:

• AddBoundaryTag not working with PlantUML 1.2025 plantuml-stdlib/C4-PlantUML#385 (comment)

Minimal not working example

New version

@startuml
!include <C4/C4_Container.puml>

AddBoundaryTag("v1", $bgColor="lightgreen", $fontColor="green", $borderColor="green")

System_Boundary(c1, "Internet Banking", $tags="v1") {
}
@enduml

See preproc output...

Versus old version (tested on V 1.2024.8)

Regards,
Th.

[arnaudroques]

Thanks for the minimal example, but unfortunately, it's not really minimal :-)

The !include <C4/C4_Container.puml> imports a lot of things, it would be nice to have an example without any !include.

From what I'm understanding, the !include builds some dynamic skinparam, but I am getting lost in the different function calls...

[The-Lum]

Hello all,

@kirchsth have you a more minimal example?

Otherwise just to see the new newline char, here is some hints:

@startuml
!include <C4/C4.puml>

AddBoundaryTag("v1", $bgColor="lightgreen", $fontColor="green", $borderColor="green")

System_Boundary(c1, "Internet Banking", $tags="v1") {
}
@enduml

Link

skinparam rectangle<<v1_boundary>> {↵ FontColor green↵ BackgroundColor lightgreen↵ BorderColor green↵}↵skinpara ...

Where you can see ↵ char...

Regards,
Th.

[The-Lum]

Can't see where the bug comes from.. but at least there is a bug on the preproc...

I open an issue about the prerpoc...

[kirchsth]

Thank you @arnaudroques and @The-Lum for the fast fix and the detailed analysis.
I tried it with with then new v1.2025.2beta3 and the color is working.