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Data type mismatches are detected by calculating a hash value of the data type signature and comparing that hash value: if the hash values are different, the type signatures must have been different too and an error is reported. Because the information about the full type signature at the sender is not available, it has to be deduced from the function call parameters and/or source code locations where the data is transmitted.
If the hash values are identical, then there is some small chance that the signatures were different although no error is reported. Because of the choice of a very advanced hash function this is very unlikely. This hash function can also be calculated more efficiently than traditional hash functions.
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