Multiple swimlane + multiple note cause a crash:
Here is an example:
@startuml
|Slowlane|
:walk;
|Fastlane|
:run;
note right
test right
end note
note left
test left
end note
@enduml
http://www.plantuml.com/plantuml/png/gmdEoI_FISnBhU6oAa_CoRRcugfnIomkWGeLbUPPSoaevEMNf2eKPQPdb00v2WebgSKbS6vgNWfOdWkcBYSr3KaPb0TJ1G00