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Fix possible crash in layers destruction.

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clearClosingLayers could've called itself from layer->setClosing.
This commit is contained in:
John Preston
2019-03-20 11:39:41 +04:00
parent 2ebbf062d0
commit 6ff8c1de05
1 changed files with 4 additions and 2 deletions
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6
Telegram/SourceFiles/window/layer_widget.cpp
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@@ -801,13 +801,15 @@ void LayerStackWidget::clearClosingLayers() {
// This may destroy LayerStackWidget (by calling Ui::hideLayer).
// So each time we check a weak pointer (if we are still alive).
layer->setClosing();
if (weak) {
// setClosing() could destroy 'this' or could call clearLayers().
if (weak && !_closingLayers.empty()) {
// We could enqueue more closing layers, so we remove by index.
Assert(index < _closingLayers.size());
Assert(_closingLayers[index].get() == layer);
_closingLayers.erase(begin(_closingLayers) + index);
} else {
// All layers were already destroyed in ~LayerStackWidget.
// Everything was destroyed in clearLayers or ~LayerStackWidget.
break;
}
}