* Add better debug message for illegal move

2015-11-07 05:34:37 +11:00 · 2015-11-07 05:34:37 +11:00 · 19136b0e7d
parent 2733816b7b
commit 19136b0e7d
1 changed files with 5 additions and 2 deletions
--- a/spacy/syntax/parser.pyx
+++ b/spacy/syntax/parser.pyx
@ -105,9 +105,12 @@ cdef class Parser:
            self.moves.set_valid(eg.is_valid, stcls)
            self.model.set_prediction(&eg)

-            assert eg.is_valid[eg.guess]
-            
            action = self.moves.c[eg.guess]
+            if not eg.is_valid[eg.guess]:
+                raise ValueError(
+                    "Illegal action: %s" % self.moves.move_name(action.move, action.label)
+                )
+            
            action.do(stcls, action.label)
        self.moves.finalize_state(stcls)
        tokens.set_parse(stcls._sent)