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Fixed crash when unloading certain plugins

When disabling a plugin that does not derive from the Plugin interface,
a crash would occur due to the use of the plugin object after it had
been deleted.
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bjorn committed Aug 21, 2019
1 parent eb294eb commit 0c59eee634ca78e29b527d30ff2cdb3de4d9dc2b
Showing with 4 additions and 9 deletions.
  1. +4 −9 src/libtiled/pluginmanager.cpp
@@ -127,17 +127,12 @@ bool PluginManager::loadPlugin(PluginFile *plugin)

bool PluginManager::unloadPlugin(PluginFile *plugin)
bool derivedPlugin = qobject_cast<Plugin*>(plugin->instance) != nullptr;
if (plugin->instance && !qobject_cast<Plugin*>(plugin->instance))

if (plugin->loader->unload()) {
if (!derivedPlugin)
plugin->instance = nullptr;

plugin->instance = nullptr;
return true;
} else {
return false;
return plugin->loader->unload();

PluginManager *PluginManager::instance()

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