Lv2Proc: Fix shutdown routine (LMMS#6944)

include/Lv2Options.h

@@ -84,6 +84,8 @@ class Lv2Options
 		return m_options.data();
 	}
 
+	void clear();
+
 private:
 	//! Initialize an option internally
 	void initOption(LV2_URID key,

include/Lv2Proc.h

@@ -175,7 +175,7 @@ class Lv2Proc : public LinkedModelGroup
 	bool m_valid = true;
 
 	const LilvPlugin* m_plugin;
-	LilvInstance* m_instance;
+	LilvInstance* m_instance = nullptr;
 	Lv2Features m_features;
 
 	// options

src/core/lv2/Lv2Features.cpp

@@ -109,7 +109,12 @@ void *&Lv2Features::operator[](const char *featName)
 
 void Lv2Features::clear()
 {
-	m_featureByUri.clear();
+	m_features.clear();
+	for (auto& [uri, feature] : m_featureByUri)
+	{
+		(void) uri;
+		feature = nullptr;
+	}
 }
 
 

src/core/lv2/Lv2Options.cpp

@@ -94,6 +94,16 @@ void Lv2Options::initOption(LV2_URID key, uint32_t size, LV2_URID type,
 }
 
 
+
+
+void Lv2Options::clear()
+{
+	m_options.clear();
+	m_optionValues.clear();
+	m_optionByUrid.clear();
+}
+
+
 } // namespace lmms
 
 #endif // LMMS_HAVE_LV2

src/core/lv2/Lv2Proc.cpp

@@ -477,6 +477,7 @@ void Lv2Proc::shutdownPlugin()
 		m_instance = nullptr;
 
 		m_features.clear();
+		m_options.clear();
 	}
 	m_valid = true;
 }