Don't use broken qHash< QList<...> > on Qt < 5.6

nyalldawson · nyalldawson · commit 3a31f54b15aa · 2017-07-07T13:50:52.000+10:00
Results in infinite recursion
diff --git a/src/core/qgis.cpp b/src/core/qgis.cpp
@@ -247,9 +247,30 @@ uint qHash( const QVariant &variant )
     case QVariant::Char:
       return qHash( variant.toChar() );
     case QVariant::List:
+
+#if QT_VERSION >= 0x050600
       return qHash( variant.toList() );
+#else
+      {
+        QVariantList list = variant.toList();
+        if ( list.isEmpty() )
+          return -1;
+        else
+          return qHash( list.at( 0 ) );
+      }
+#endif
     case QVariant::StringList:
+#if QT_VERSION >= 0x050600
       return qHash( variant.toStringList() );
+#else
+      {
+        QStringList list = variant.toStringList();
+        if ( list.isEmpty() )
+          return -1;
+        else
+          return qHash( list.at( 0 ) );
+      }
+#endif
     case QVariant::ByteArray:
       return qHash( variant.toByteArray() );
     case QVariant::Date:
