[QGIS-Developer] bigger precision on qDebug() stream ?

[Sandro Santilli]

I tried getting more precision for printing doubles in a qDebug() with
std::setprecision (which works on iostream) but failed:

  error: no match for ‘operator<<’ (operand types are ‘QDebug’ and ‘std::_Setprecision’)

This double-double comparison is driving me nuts so would love to read
more about the actual difference in those to QgsIntervals:

  https://travis-ci.org/qgis/QGIS/jobs/318577492#L1955-L1958

How do you raise precision in a qDebug ?

--strk;