A bill that would extend the period of time during which child victims of sexual abuse could file claims against their abusers stalled Tuesday night, when the formal legislative session ended with unresolved differences between House and Senate versions and concerns about the bill’s constitutionality.

But advocates say they remain optimistic that a compromise can be forged in a conference committee in the coming weeks. Legislation can still be approved after formal sessions end, as long as no member raises an objection to the measure.