Marcel Taeumel uploaded a new version of Regex-Tests-Core to project The Trunk:
http://source.squeak.org/trunk/Regex-Tests-Core-ct.13.mcz

==================== Summary ====================

Name: Regex-Tests-Core-ct.13
Author: ct
Time: 8 July 2021, 12:45:29.187695 am
UUID: 77b31977-aedb-324b-b792-fc32346ff596
Ancestors: Regex-Tests-Core-ct.12

Adds a regression test for lookbehinds in optional/repeatable groups which should work.

=============== Diff against Regex-Tests-Core-ct.12 ===============

Item was added:
+ ----- Method: RxParserTest>>testOptionalLookbehind (in category 'tests') -----
+ testOptionalLookbehind
+ 
+ 	self assert: ['A' matchesRegex: '((?<=^)A)+']!