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-rw-r--r--src/state.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/state.c b/src/state.c
index e5c789b..9b44c42 100644
--- a/src/state.c
+++ b/src/state.c
@@ -192,6 +192,11 @@ store_callback(LV2_State_Handle handle,
uint32_t flags)
{
LilvState* const state = (LilvState*)handle;
+
+ if (find_property((const LilvState*)handle, key)) {
+ return LV2_STATE_ERR_UNKNOWN; // TODO: Add status for duplicate keys
+ }
+
append_property(state, &state->props, key, value, size, type, flags);
return LV2_STATE_SUCCESS;
}