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-rw-r--r--gtk2_ardour/lv2_plugin_ui.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 96f2a182b7..5f9f024636 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -86,7 +86,11 @@ LV2PluginUI::touch(void* controller,
uint32_t port_index,
bool grabbed)
{
- LV2PluginUI* me = (LV2PluginUI*)controller;
+ LV2PluginUI* me = (LV2PluginUI*)controller;
+ if (port_index >= me->_controllables.size()) {
+ return;
+ }
+
ControllableRef control = me->_controllables[port_index];
if (grabbed) {
control->start_touch(control->session().transport_frame());