perhaps.diff

diff --git a/src/core/args.c b/src/core/args.c
index 3970dc1..1ffa19f 100644
--- a/src/core/args.c
+++ b/src/core/args.c
@@ -86,6 +86,8 @@ MVMObject * MVM_args_use_capture(MVMThreadContext *tc, MVMFrame *f) {
     MVMCallCapture *capture = (MVMCallCapture *)tc->cur_usecapture;
     if (capture->body.use_mode_frame)
         MVM_frame_dec_ref(tc, capture->body.use_mode_frame);
+    else if (capture->body.apc)
+        free(capture->body.apc);
     capture->body.mode               = MVM_CALL_CAPTURE_MODE_USE;
     capture->body.use_mode_frame     = MVM_frame_inc_ref(tc, f);
     capture->body.apc                = &f->params;