[ASan] Fix heap-use-after-free issue with groups#1279
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==2317==ERROR: AddressSanitizer: heap-use-after-free on address 0x6170000633c0 at pc 0x55ed1d8e8d8b bp 0x7ffda4bef580 sp 0x7ffda4bef578
WRITE of size 8 at 0x6170000633c0 thread T0
#0 0x55ed1d8e8d8a in Group::SetLeader(Mob*) ../zone/groups.h:80
#1 0x55ed1d8e8d8a in Group::DisbandGroup(bool) ../zone/groups.cpp:1016
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KimLS
approved these changes
Mar 6, 2021
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