Looks like they use a mailing list for bug reports:
dnsmasq-disc...@lists.thekelleys.org.uk
http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
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I am happy to report this bug upstream however I've been unable to find
a bug tracker for DNSMASQ specifically.
Take Care
Jason
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https://bugs.launchpad.net/bugs/1686192
Title:
DHCP Rel
Hi! Thanks for reporting this and including your configuration file.
Given you are seeing this across distros I think this warrants an
upstream report. Would you be willing to file something upstream and
provide a link back in this bug report? Thanks!
** Tags added: needs-upstream-report
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You