[Minor] Fix learning with symbols that have no static scores

diff --git a/src/lua/lua_task.c b/src/lua/lua_task.c
index 1fbf988a9b648d6cbdb89a081009f2d12de4a2e8..4a604014515c955975ba9c543c73f5e07f5a263c 100644 (file)
--- a/src/lua/lua_task.c
+++ b/src/lua/lua_task.c
@@ -4791,7 +4791,7 @@ lua_task_process_ann_tokens (lua_State *L)
 
                                        gdouble norm_score;
 
-                                       if (!isnan (sres->sym->score)) {
+                                       if (sres->sym && !isnan (sres->sym->score)) {
                                                if (sres->sym->score == 0) {
 
                                                        if (sres->score == 0) {