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These are some of the most minor yet pernicious errors in smart contract development — minor spelling, syntax, or structural issues that will lead to fundamentally different execution than what the authors expect. For example, a typographical error can occur when the intent of a defined operation is to sum a number to a variable (+=) but it has accidentally been defined in a wrong way (=+), introducing a typo which happens to be a valid operator. Instead of calculating the sum it initializes the variable again. Another example is the statement require(x = true) which sets x to true instead of checking that the value of x is true. Octane searches for these small, pernicious errors that—while valid code—may not be the intended flow of the smart contract developers.