3252e1808c
Don't call style->unpolish()/polish() when the old and new style did not change which might happen when setting a style sheet as this might create an infinite loop and the style (re)sets some window attribute. Bailing out early is not an option here as newStyle might be a nullptr so q->style() will fall back to the application default style. Pick-to: 6.9 Fixes: QTBUG-133332 Change-Id: Ifa9ee4fdfa64b2768337e2d90b7bbaac5f3fcd70 Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>