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authorTavian Barnes <tavianator@tavianator.com>2020-03-23 12:59:56 -0400
committerTavian Barnes <tavianator@tavianator.com>2020-03-23 12:59:56 -0400
commit12e93e7c7721f9a581f62a8df9534571d0ec353d (patch)
tree4b352f5a4c940438fb9bcca117a1d330f6134d93 /spawn.h
parentcd76a94a328719df61c15b02f25f984b43cce19e (diff)
downloadbfs-12e93e7c7721f9a581f62a8df9534571d0ec353d.tar.xz
opt: Avoid dangling pointers in de_morgan()
If optimize_{and,or}_expr() relocates expr, we need to update the parent expr or else we might return garbage. It seems impossible to actually trigger this bug right now, since the {and,or} optimizations are symmetric, but it could be hit if the simplifications in de_morgan() expose more information than was known previously.
Diffstat (limited to 'spawn.h')
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