IndexOutOfBoundsException when {% endautoescape %} is missing

[waltkb]

When parsing any template with Pebble 3.1.4, an IndexOutOfBoundsException occurs when one places an {% autoescape false %} without additionally adding an {% endautoescape %} in the template.

Pebble template:

This is a test
{% autoescape false %}
this is still a test

Stack trace:

Caused by: java.lang.IndexOutOfBoundsException: Index 7 out of bounds for length 7
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
	at java.base/java.util.Objects.checkIndex(Objects.java:373)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at com.mitchellbosecke.pebble.lexer.TokenStream.next(TokenStream.java:42)
	at com.mitchellbosecke.pebble.tokenParser.AutoEscapeTokenParser.parse(AutoEscapeTokenParser.java:49)
	at com.mitchellbosecke.pebble.parser.ParserImpl.subparse(ParserImpl.java:195)
	at com.mitchellbosecke.pebble.parser.ParserImpl.subparse(ParserImpl.java:104)
	at com.mitchellbosecke.pebble.parser.ParserImpl.parse(ParserImpl.java:97)
	at com.mitchellbosecke.pebble.PebbleEngine.getPebbleTemplate(PebbleEngine.java:169)
	at com.mitchellbosecke.pebble.PebbleEngine.lambda$getTemplate$2(PebbleEngine.java:151)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
	at com.mitchellbosecke.pebble.cache.template.ConcurrentMapTemplateCache.computeIfAbsent(ConcurrentMapTemplateCache.java:24)
	at com.mitchellbosecke.pebble.cache.template.ConcurrentMapTemplateCache.computeIfAbsent(ConcurrentMapTemplateCache.java:9)
	at com.mitchellbosecke.pebble.PebbleEngine.getTemplate(PebbleEngine.java:151)
	at com.mitchellbosecke.pebble.PebbleEngine.getTemplate(PebbleEngine.java:122)
	at X.Y.Z.X.Y.Z.XYZService.<clinit>(XYZ.kt:27)
	... 2 more

[ogrammer]

Were you expecting the rest of the document to follow that rule or a more descriptive exception?