Do not add signature to memory for private function calls #2058
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What I did
Do not write a signature to memory when preparing args for a private function call. Fixes #1695
How I did it
In
vyper/parser/parser_utils.py::pack_arguments, replaced thereturn_placeholderkwarg withis_external_call. WhenFalse, the signature is stored in memory.I had to adjust some memory offsets to make this work, but I think the resulting code is a bit cleaner.
How to verify it
Run the tests. I didn't add any cases, but I did confirm that we have sufficient coverage around this functionality.
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