fix: #3718 Correct DFAState index in Lexer ATN Simulator

Signed-off-by: Jim.Idle <[email protected]>
antlr · Aug 15, 2022 · e99022e · e99022e
1 parent 4c54ee1
commit e99022e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/runtime/Go/antlr/lexer_atn_simulator.go b/runtime/Go/antlr/lexer_atn_simulator.go
@@ -606,7 +606,7 @@ func (l *LexerATNSimulator) addDFAState(configs ATNConfigSet, suppressEdge bool)
 		// The proposed state has already been added to the DFA. We still have the pointer, so
 		// we can modify it even though it is stored already.
 		//
-		proposed.stateNumber = dfa.states.Len()
+		proposed.stateNumber = dfa.states.Len() - 1
 		configs.SetReadOnly(true)
 		proposed.configs = configs
 	}