Equivalent of antlr#3537

parrt · Mar 26, 2022 · ad21ee9 · ad21ee9
1 parent 3cccfdb
commit ad21ee9
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/runtime/Go/antlr/error_strategy.go b/runtime/Go/antlr/error_strategy.go
@@ -738,7 +738,11 @@ func (b *BailErrorStrategy) Recover(recognizer Parser, e RecognitionException) {
 	context := recognizer.GetParserRuleContext()
 	for context != nil {
 		context.SetException(e)
-		context = context.GetParent().(ParserRuleContext)
+		if parent, ok := context.GetParent().(ParserRuleContext); ok {
+			context = parent
+		} else {
+			context = nil
+		}
 	}
 	panic(NewParseCancellationException()) // TODO we don't emit e properly
 }