On Sunday, 23 November 2025 at 12:43:05 UTC, Jabba Laci wrote: > auto m1 = matchFirst(s, regex(r"(..).*\1")); > > returns an empty m1 object. What am I doing wrong? The same > regex works in Python. This is a bug, first reported in 2015: https://issues.dlang.org/show_bug.cgi?id=15489