gcc/testsuite/g++.dg/warn/unused-result1.C

// PR c++/27371

class QByteArray {
public:
  QByteArray(const QByteArray &);
};
class QString {
  QByteArray toLocal8Bit() const __attribute__ ((warn_unused_result));
  void fooWarnHere() const { toLocal8Bit(); } // { dg-warning "ignoring" }
};