QTest::toString() returns a new[]'ed char array, which needs to be
manually deleted and QVERIFY2() doesn't take ownership of its second
argument.
Fix by wrapping in unique_ptr<char[]>(...).get().
Bug exists since the dawn of the public history.
Pick-to: 6.6 6.5 6.2 5.15
Change-Id: I19ec09f46ec0ce5eacf1437f62dc625bc9343831
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
d3c08df330