Crash using qml FileDialog

[Lionel21190]

Hi everyone,

I am facing a weird issue.

Under ubuntu 18.04 and Qt 5.12.2, when i open FileDialog, my application crash.

Here is a simple example :

import QtQuick 2.7
import QtQuick.Window 2.2
import QtQuick.Controls 2.1
import QtQuick.Controls.Material 2.1
import QtQuick.Dialogs 1.2

Item {
    id:item1


    FileDialog {
        id: fD
        title: "Test Dialog"

        folder: shortcuts.home
        onAccepted: {
            console.log("You chose: " + fileDialog.fileUrls)
        }
        onRejected: {
            console.log("Canceled")
        }
    }

    Component.onCompleted:
    {
        fD.open();
    }

}

It's a simple example, normally i use a button to trigger the opening.

Here is the stack trace i got , when running under an IDE:

__Gl_raise
__Gl_abort
__libc_message
malloc_printerr
munmap_chunk
_Gl__libc_free
png_free
png_read_destroy
png_destroy_read_struct

From a terminal i only got :

munmap_chunk(): invalid pointer
Abandon (core dumped)

Thank you in advance, if you have any idea.

[J.Hilk]

HI @Lionel21190 and welcome

I'm not sure but shouldn't this

fileDialog.fileUrls

be

fD.fileUrls

?

[Lionel21190]

Hi thank you !

Well you are right, this is a mistake.

I found why te crash appear, it's not because of Qt.

It's a conflict, with a static version libpng which i use and Qt's libpng (dynamic).

I use a third party library which need libpng, now i use the same as Qt and it work fine.