QML Particles QVector<T>::operator[]: "index out of range"

Galbarad

Hi all
I have some problem with particles. I'll try create effect of burning ground.
but I see C++ exception instead of burning ground))
maybe somebody found mistake in my code
thank you

update1

I create new particles so each ImageParticle belong to only one group, but without result
error raise only when emitter enabled first time or never, looks like a bug?

update 2
there is small project for watching error
(just pres mouse when application started)
https://drive.google.com/open?id=0B_sjcKIz2wKGQUM0OUY0djdOTXM

update 3
I leave in GroupGoal only one group by still take same error
looks like I miss some basic

update 4
my particle system has very bad performance also ((

thank you

ParticleSystem {
        id: psMain
        anchors.fill: parent
        z: 50
    }

    ImageParticle {
        id: ipSmoke
        system: psMain

        groups: ["smoke", "flame_ground"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#FF000011"
        colorVariation: 0
        z: 50
    }

    ImageParticle {
        id: ipFlame
        system: psMain

        groups: ["flame", "flame_ground"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#11ff400f"
        colorVariation: 0.1
        z: 50
    }

    AngleDirection {
        id: agFire
        angle: 40
        magnitude: 500
        angleVariation: 2
        magnitudeVariation: 5
    }

    AngleDirection {
        id: agGround
        angle: 270
        magnitude: 500
        angleVariation: 180
        magnitudeVariation: 50
    }

    GroupGoal {
        id: ggGround
        groups: ["flame", "smoke"]
        goalState: "burn_ground"
        system: psMain

        height: 100
        anchors.bottom: parent.bottom
        anchors.left: parent.left
        anchors.right: parent.right
        jump: true
    }

    ParticleGroup {
        name: "burn_ground"
        duration: 500
        system: psMain

        TrailEmitter {
            group: "flame_ground"
            //system: psMain
            enabled: true
            anchors.fill: parent
            lifeSpan: 300
            emitRatePerParticle: 5
            size: 10
            velocity: agGround
            acceleration: PointDirection {y: 20}
        }
    }

    Emitter {
        id: eFire
        x: 0
        y: 0
        z: 50

        group: "flame"
        system: psMain

        width: 10
        height: 10

        enabled: false
        emitRate: 1500
        lifeSpan: 1500
        size: 15
        endSize: 15
        sizeVariation: 10
        acceleration: PointDirection { y: 80; x: 100 }
        velocity: agFire
    }

    TrailEmitter {
        id: eSmoke
        group: "smoke"
        follow: "flame"
        system: psMain

        emitRatePerParticle: 1
        lifeSpan: 1400
        lifeSpanVariation: 400
        size: 16
        endSize: 8
        sizeVariation: 8
        acceleration: PointDirection { y: -120;}
        velocity: agFire
    }

Galbarad

looks like problem with few groups in ImageParticle
there same minimal project where problem fixed
https://drive.google.com/file/d/0B_sjcKIz2wKGd2xHS21Db0ZfQms/view?usp=sharing

ImageParticle {
        id: ipSmoke
        system: psMain

        groups: ["smoke"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#FF000011"
        colorVariation: 0
        z: 50
    }

    ImageParticle {
        id: ipFlame
        system: psMain

        groups: ["flame"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#11ff400f"
        colorVariation: 0.1
        z: 50
    }

    ImageParticle {
        id: ipGroundSmoke
        system: psMain

        groups: ["smoke_ground"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#FF000011"
        colorVariation: 0
        z: 50
    }

    ImageParticle {
        id: ipGroundFlame
        system: psMain

        groups: ["flame_ground"]
        source: "qrc:///particleresources/glowdot.png"
        color: "#11ff400f"
        colorVariation: 0.1
        z: 50
    }

but performance still too bad (((