SIGSEGV on Android using Qml

[florentmpt]

Hello,
I run the QZXing module within an Android app in order to scan barcode.
On my Pocophone F1 which runs Android 10, it works well.
On my Asus tablet which runs Android 7.0 it crashes with an "undebuggable" fatal error:

F libc : Fatal signal 11 (SIGSEGV), code 1, fault addr 0xe in tid 21611 (Thread (pooled))

I tried to use a static lib, I tried dynamic.

When I remove the QZXingFilter from my qml, the camera works just fine but it seems it's coming when entering in this function:
QString QZXing::decodeImage(const QImage &image, int maxWidth, int maxHeight, bool smoothTransformation)

After enabling debug traces, it must occur within this part of the code:

        try {
                qDebug() << "Decoding phase 1: started";
                res = decoder->decode(bb, hints);
                processingTime = t.elapsed();
                lastDecodeOperationSucceded_ = true;
                break;
            } catch(zxing::Exception &/*e*/){
                qDebug() << "Decoding phase 1: failed";
            }

[florentmpt]

the way the lib is used is not compliant with this Qt configuration:
LIBS += -lz

It needs to be removed from the project .pro file.

[florentmpt]

After more research it looks like QZXing is not compliant with Zlib at this point on Android 7.0