[Interest] Raster Engine Issues

[Alper Sağlam]

Hi Everyone,

I am deailing with qt backtrace from a core file, it looks like it is not
reproducible (sporadic) and happened three times in our environments. My
findings shows that some issues occurred in qt raster engine and qt text
engine. I am pasting the bt to here and I just want to know that is there
any known issues (bugs or misuses) of raster engine, text engines and
fonts.





















*#0  qt_alphamapblit_quint32 (rasterBuffer=0x3, x=-8619137, y=<value
optimized out>, color=0, map=0xb5402ffc <Address 0xb5402ffc out of bounds>,
mapWidth=9, mapHeight=<value optimized out>, mapStride=12,    clip=0x0) at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qdrawhelper.cpp:7198#1
0xb613f204 in QRasterPaintEngine::alphaPenBlt (this=<value optimized out>,
src=0xb6159570, bpl=12, depth=62, rx=84, ry=51, w=9, h=11)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qpaintengine_raster.cpp:2605#2
0xb62569ec in QFontEngineQPF::draw (this=0x1d8d738, p=0x1d15640, _x=33,
_y=<value optimized out>, si=...)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/text/qfontengine_qpf.cpp:669#3
0xb6149d70 in QRasterPaintEngine::drawTextItem (this=0x1d15640, p=...,
textItem=...) at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qpaintengine_raster.cpp:3133#4
0xb60e7718 in QPainter::drawTextItem (this=<value optimized out>, p=...,
_ti=...) at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qpainter.cpp:6709#5
0xb61da58c in drawMenuText (this=<value optimized out>, p=0x0, pos=<value
optimized out>, selection=<value optimized out>)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/text/qtextlayout.cpp:2050#6
QTextLine::draw (this=<value optimized out>, p=0x0, pos=<value optimized
out>, selection=<value optimized out>)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/text/qtextlayout.cpp:2425#7
0xb60eaa4c in qt_format_text (fnt=..., _r=<value optimized out>,
tf=134217745, option=0x0, str=..., brect=0x0, tabstops=29021188, ta=0x0,
tabarraylen=0, painter=0xbe9e60f8)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qpainter.cpp:8283#8
0xb60eb3c4 in QPainter::drawText (this=0xbe9e60f8, r=<value optimized out>,
flags=<value optimized out>, str=..., br=0x0)    at
/homes/tr1a5038/tr1a5038-qt/qt-everywhere-opensource-src-4.8.6/src/gui/painting/qpainter.cpp:6199...............................*

Thank you for your contribution.
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