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Martin Flöser authored
Summary: Another change mostly for KWin (Wayland compositor). KWin destroys it's internal Wayland connection prior to the QStyle getting destroyed. As the ShadowHelper initialized Wayland objects those would be destroyed after the connection is destroyed. With latest Wayland library this would cause a crash. Thus unpolish is implemented in the style and deletes the ShadowHelper. KWin can on tear down invoke the unpolish and thus make sure it doesn't crash. CCBUG: 372001 Reviewers: #plasma, broulik, hpereiradacosta Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D3240
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