If a Jew converts (becomes a mumar) after an eruv has been set for the year, does he invalidate the eruv for subsequent Shabbatot?
Synopsis
Conversion/apostasy that occurs after an annual eruv is set invalidates the eruv for all subsequent Shabbatot, since each Shabbat is independently evaluated. However, apostasy on Shabbat itself does not retroactively invalidate that Shabbat.
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