The message to ignore is given in source code, hence UTF-8; it was
being ingested as local 8-bit, which lead to problems when a debug
message wasn't 7-bit clean and the system's native encoding wasn't
UTF-8. Modified QtTest's selftest to check encoding failure.
Pick-to: 5.15
Change-Id: I898744a450115b6d2ee992f1d3b36d8efaeeff7e
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2491ee98b1