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-rw-r--r--src/engine/events/CreatePort.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/engine/events/CreatePort.cpp b/src/engine/events/CreatePort.cpp
index 4aebc0b2..33477400 100644
--- a/src/engine/events/CreatePort.cpp
+++ b/src/engine/events/CreatePort.cpp
@@ -96,7 +96,9 @@ CreatePort::pre_process()
: 0;
Shared::Resource::Properties::const_iterator index_i = _properties.find(uris.lv2_index);
- if (index_i->second.type() != Atom::INT
+ if (index_i == _properties.end()) {
+ index_i = _properties.insert(make_pair(uris.lv2_index, (int)old_num_ports));
+ } else if (index_i->second.type() != Atom::INT
|| index_i->second.get_int32() != static_cast<int32_t>(old_num_ports)) {
QueuedEvent::pre_process();
_error = BAD_INDEX;