Bug#860509: qtcharts-opensource-src: FTBFS on sparc64: Segmentation fault

["Aaron M. Ucko" <ucko@debian.org>]

Source: qtcharts-opensource-src
Version: 5.7.1-1
Severity: important
Justification: fails to build from source

The qtcharts-opensource-src build for sparc64 (admittedly not a
release architecture) failed:

  make[3]: Leaving directory '/<<PKGBUILDDIR>>/tests/auto/qml'
  JIT is disabled for QML. Property bindings and animations will be very slow. Visit https://wiki.qt.io/V4 to learn about possible solutions for your platform.
  Makefile:287: recipe for target 'check' failed
  make[3]: *** [check] Segmentation fault
  make[3]: Leaving directory '/<<PKGBUILDDIR>>/tests/auto/qml-qtquicktest'
  Makefile:1724: recipe for target 'sub-qml-qtquicktest-check' failed
  make[2]: *** [sub-qml-qtquicktest-check] Error 2
  make[2]: Leaving directory '/<<PKGBUILDDIR>>/tests/auto'
  dh_auto_test: make -j4 check -Ctests/auto QML2_IMPORT_PATH=/<<PKGBUILDDIR>>/test_root/usr/lib/sparc64-linux-gnu/qt5/qml returned exit code 2
  debian/rules:39: recipe for target 'override_dh_auto_test' failed
  make[1]: *** [override_dh_auto_test] Error 2

Could you please take a look?  I don't have further details, but
perhaps you can reproduce the problem on a porterbox.

Thanks!