fix: Always assign the (possibly to None) lm_gc property

Author: NeoLegends

recognition/advanced_tree_search.py

@@ -208,7 +208,6 @@ def __init__(
         (
             self.config,
             self.post_config,
-            self.lm_gc_job,
         ) = AdvancedTreeSearchJob.create_config(**kwargs)
         self.feature_flow = feature_flow
         self.exe = self.select_exe(crp.flf_tool_exe, "flf-tool")
@@ -313,6 +312,7 @@ def specialize_lm_config(crp, lm_config):
                 ).out_lm
                 for i, lm in enumerate(arpa_lms)
             }
+            lm_gc = None
         else:
             lm_gc = AdvancedTreeSearchLmImageAndGlobalCacheJob(
                 crp, lmgc_scorer if lmgc_scorer is not None else feature_scorer, extra_config, extra_post_config
@@ -463,11 +463,11 @@ def specialize_lm_config(crp, lm_config):
         config._update(extra_config)
         post_config._update(extra_post_config)
 
-        return config, post_config
+        return config, post_config, lm_gc
 
     @classmethod
     def hash(cls, kwargs):
-        config, post_config = cls.create_config(**kwargs)
+        config, post_config, lm_gc = cls.create_config(**kwargs)
         return super().hash(
             {
                 "config": config,