mpatch.c in Mercurial before 4.6.1 mishandles integer addition and subtraction, aka OVE-20180430-0002.Referenceshttps://www.mercurial-scm.org/repo/hg-committed/log?rev=modifies%28%22mercurial%2Fmpatch.c%22%29+and+4.5%3A%3Ahttps://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.6.1_.282018-06-06.29https://www.mercurial-scm.org/repo/hg/rev/1acfc35d478chttps://access.redhat.com/errata/RHSA-2019:2276https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
