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    Bug 
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    Resolution: Duplicate
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    P3: Somewhat important 
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    None
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    5.15.0
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    None
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        8
All of the QByteArray .toInt() .toLong(), etc methods call the internal function nulTerminated() which ensures that the buffer being processed is terminated with a NUL character.
.toDouble() doesn't do this – which would not be a problem except for the fact that the numLen argument being passed to qt_asciiToDouble is not being respected inside that function (it may read past the end of buffer).  See related issue: QTBUG-85580.
As such, I suggest either fixing QTBUG-85580 above or if not, then making .toDouble() operate on an enforced nulTerminated() buffer.
- relates to
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                    QTBUG-74286 Reimplement QLocaleData::stringTo(Uns|)LongLong() to take size of string -         
- Closed
 
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                    QTBUG-66115 Let (QString|QLocale)::toFloat ignore trailing non-digits -         
- Open
 
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- resulted in
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                    QTBUG-85580 Often-used function `qt_asciiToDouble` may read past end of buffer -         
- Closed
 
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