vyper.exceptions.TypeCheckFailure: pack_arguments did not return a value

[Eniola4031]

Version Information

• vyper Version (output of vyper --version): 0.2.16
• OS: osx
• Python Version (output of python --version): python3

I tried to compile my codes using "vyper file_name.vy" and this is the error I get

Please include information like:

*Error compiling: bounty.v

y
vyper.exceptions.TypeCheckFailure: pack_arguments did not return a value

This is an unhandled internal compiler error. Please create an issue on Github to notify the developers.

• vyper
• the code that caused the failure (see this link for help with formatting code)
• please try running your example with the --debug flag turned on

How can it be fixed?

Fill this in if you know how to fix it.

[fubuloubu]

you might be missing the return value from the interface, or the fact that you're re-using the same interface that we have defined internally might be causing problems.

[charles-cooper]

Also maybe try v0.3.0?

[Eniola4031]

@fubuloubu I am new to vyper and only trying to implement the withdraw and deposit functions by interfacing the safeTransferFrom function from ERC721. Do you mind simplifying please?

[Eniola4031]

@charles-cooper o.2.16 is the latest release

[charles-cooper]

On v0.3.0 this throws

  File "/home/charles/.venvs/vyper/lib/python3.8/site-packages/vyper-0.3.0-py3.8.egg/vyper/old_codegen/external_call.py", line 124, in _external_call_helper
    assert len(contract_sig.args) == len(args_lll)

which is probably a dup of #2374

[charles-cooper]

closing as this is a dup of #2374

By the way @Eniola4031 v0.3.0 is the latest release but as of yesterday we did not have the binaries uploaded to github. This has been corrected and you can view the released binaries here https://github.com/vyperlang/vyper/releases/tag/v0.3.0