Details
P1: Critical Description
I tried to use emoji symbols "⏸️" and "▶️" as player buttons (quick prototype). On Ubuntu 16.04 it worked fine, but on Android (Xiaomi Mi6 MIUI 9) I can't see any text on buttons, just little blue dot (see screenshot). But even worse, my app started to crash in random moments - sometimes during startup, sometimes on exit, sometimes between. I am pretty sure that these symbols causes failures - I did a lot of tests and provided minimal example (see below).
Crash log of minimal reproducible demo (more logs of my app in attachments logs.txt
):
* * * * * * * * * * * * * * * * Build fingerprint: 'Xiaomi/sagit/sagit:7.1.1/NMF26X/V9.0.1.0.NCAMIEI:user/release-keys' Revision: '0' ABI: 'arm' pid: 20143, tid: 20167, name: QtThread >>> org.qtproject.example.emojibugdemo <<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x7a1e5c6e r0 bf2fd798 r1 7a1e5c6e r2 00000001 r3 00000001 r4 c8c57410 r5 00000004 r6 bf2fd798 r7 e7652008 r8 c8c57468 r9 00000001 sl 00000001 fp c8c57400 ip c9b38dd8 sp bf2fd758 lr c970ae7b pc c970a784 cpsr 600b0030 backtrace: #00 pc 001ad784 /data/app/org.qtproject.example.emojibugdemo-1/lib/arm/libQt5Gui.so (_ZNK18QTextureGlyphCache18textureMapForGlyphEj6QFixed+19) #01 pc 001ade77 /data/app/org.qtproject.example.emojibugdemo-1/lib/arm/libQt5Gui.so (_ZN23QImageTextureGlyphCache11fillTextureERKN18QTextureGlyphCache5CoordEj6QFixed+26)
Here is minimal example:
import QtQuick 2.7 import QtQuick.Controls 2.0 import QtQuick.Layouts 1.3 ApplicationWindow { visible: true width: 640 height: 480 title: qsTr("Hello World") StackView { anchors.fill: parent initialItem: Page { id: apage property bool isPlaying: false Button { anchors.centerIn: parent text: apage.isPlaying ? "⏸️" : "▶️" // <--------- This causes random failures in adreno. onClicked: apage.isPlaying = !apage.isPlaying } } } }
