3.16 State Modification

Contract state modifications made in functions whose mutability is declared as view or pure will revert in contracts compiled with Solidity version greater than or equal to 0.5.0.

This is because this compiler version started using the STATICCALL opcode for such functions, this instruction leads to a revert, if that particular function modifies the contract state.

So when analyzing the security aspects of contracts it's good to pay attention to the mutability of the functions to see, if they are view or pure, but they actually modify the contract state in which case they would lead to reverts at runtime.