[Merged by Bors] - Lint for sum and product in consensus code #2226
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Issue Addressed
Closes #1621
Proposed Changes
Use the
disallowed_method
lint to ban uses ofIterator::{sum,product}
fromtypes
andstate_processing
.Additional Info
The lint is turned off in the tree hash caching code, as it is performance sensitive and overflowy arithmetic is already allowed there.