Fix integer overflow in analysis around gas cost of undefined instruction#93

Merged

chfast merged 3 commits intomasterfrom analysis-overflow

Jul 16, 2019

+33-1

Commits on Jul 16, 2019

test: Add test for block cost becoming negative
chfast
committed
Test for incorrect analysis result

gumb0
authored and
chfast
committed
Prevent integer overflow in analysis

gumb0
authored and
chfast
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