PVS-Studio warning V519 for QT

QV4::ReturnedValue
QQuickJSContext2DPrototype::method_createPattern(....)
{
  ....
  if (repetition == QStringLiteral("repeat") ||
      repetition.isEmpty()) {
    pattern->patternRepeatX = true;
    pattern->patternRepeatY = true;
  } else if (repetition == QStringLiteral("repeat-x")) {
    pattern->patternRepeatX = true;
  } else if (repetition == QStringLiteral("repeat-y")) {
    pattern->patternRepeatY = true;
  } else if (repetition == QStringLiteral("no-repeat")) {
    pattern->patternRepeatY = false;
    pattern->patternRepeatY = false;
  } else {
    //TODO: exception: SYNTAX_ERR
  }
  ....
}

This suspicious code was found in QT project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'pattern->patternRepeatY' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 1775, 1776. qquickcontext2d.cpp 1776

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