Segmentation fault when using QML Map and images

Boaschtel

Hello,
I'm recently encountering a strange behavior with one of my applications. Basically it became impossible for me to use a QML Map: My application compiles fine without any errors, but immediately crashes during runtime giving me a segmentation fault. I first suspected some issues with my C++ backend code, however after systematically switching off everything related to C++ I was able to narrow down the issue to QML Map.

The code execution stops here:

0x7767a225  <+0x0015>        f0 0f ba 30 00           lock btrl $0x0,(%eax)

My first attempt at diagnosing the problem was to run one of the provided map examples, in this case "Map Viewer", which also crashes. Thus I continued by creating a minimal working example with some of the functionalities I wanted my application to have.

main.qml:

import QtQuick 2.10
import QtQuick.Window 2.3
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.3

Window {
    id: appMainWindow
    visible: true
    width: 1920
    height: 1080

    SwipeView {
        id: swipeView
        currentIndex: 1
        interactive: false
        anchors.bottom: parent.bottom
        anchors.bottomMargin: 300
        anchors.right: parent.right
        anchors.rightMargin: 250
        anchors.left: parent.left
        anchors.leftMargin: 250
        anchors.top: parent.top
        anchors.topMargin: 100

        MinimalMap {

        }

    }

}

MinimalMap.qml:

import QtQuick 2.10
import QtLocation 5.9
import QtPositioning 5.8

Item {
    visible: true

    Plugin {
        id: mapPlugin
        name: "osm"
        locales: "en_US"
    }

    Map {
        anchors.fill: parent
        plugin: mapPlugin

        center: QtPositioning.coordinate(0,0)
        zoomLevel: 14
    }
}

This example runs and compiles just fine.

However, when I add an image with:

    Image {
        id: image
        source: "images/logo_full.png"
    }

To my main.qml, the application compiles fine but crashes with the previously described error.
Once I remove the image or the map the application runs fine again. I suspect a problem with my system, however I have no clue where to start, any help is highly appreciated.

I'm working with QT 5.10, using MinGW 32-bit.
Thank you.

EDIT: I continued playing around with my build configuration and I figured out that my application does not crash when changing the qmake configuration to Release.

? Offline

Hi, welcome to the forum. And thank you for your detailed report. I can't reproduce it on desktop Linux so far. Also I don't have minGW installed on Windows, so it would be great if someone else (cough @mrjj cough) could check it on that platform first before we file an actual bug report.

mrjj

@Boaschtel said in Segmentation fault when using QML Map and images:

MinimalMap.qml:

Hi, how can i run it ?
Just create a std quick app and copy files?
Not sure what to do with MinimalMap.qml:

Anyway, the example "Map Viewer" just crashes
alt text

but only with mingw compiler

with visual studio 2015
alt text
it works