Nothing here is empty and even if anything were, QStringBuilder properly
handles empty strings.
In static member function ‘static void QConcatenable<QByteArrayView>::appendTo(QByteArrayView, char*&)’,
inlined from ‘static void QConcatenable<QStringBuilder< <template-parameter-1-1>, <template-parameter-1-2> > >::appendTo(const type&, T*&) [with T = char; A = QByteArrayView; B = const char (&)[20]]’ at qstringbuilder.h:398:37,
inlined from ‘T QStringBuilder< <template-parameter-1-1>, <template-parameter-1-2> >::convertTo() const [with T = QByteArray; A = QByteArrayView; B = const char (&)[20]]’ at qstringbuilder.h:117:54,
...
qstringbuilder.h:178:19: error: ‘void* memcpy(void*, const void*, size_t)’ forming offset [1, 5] is out of the bounds [0, 1] of object ‘QByteArray::_empty’ with type ‘const char’ [-Werror=array-bounds=]
QStringBuilder::convertTo() creates the target as
const qsizetype len = QConcatenable< QStringBuilder<A, B> >::size(*this);
T s(len, Qt::Uninitialized);
We know len can't be zero because GCC is complaining about a memcpy()
when the offset has been changed from 0, meaning QByteArray was given a
non-zero size and therefore its data pointer is not &QByteArray::_empty.
Fixes: QTBUG-116763
Pick-to: 6.5 6.6
Change-Id: I85599ea5ca7a4b79a8bbfffd178af437984080fb
Reviewed-by: Shawn Rutledge (away) <shawn.rutledge@qt.io>
9aaf12ebaa