While the idea to delay the construction of the QVLAs until we know we
need them is elegant, we're doing a lot of checks twice or thrice this
way, so merely re-set the a, b pointers and otherwise continue
executing.
This requires us to default-construct the QVLAs before potentially
assign()ing to them, but that ought to be cheap, given the compiler
can see everything that's going on in QVLA.
Pick-to: 6.5
Change-Id: I4e42d5ab48711af91cc1785171524be5fb45ae2f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
(cherry picked from commit 4308ab70cafa4398aa72dfe63bc580a6ecff9e52)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 646bea85a5f82b73755f6f1d743b65f90a224d66)
bcd456154c