Decimal Precision Override disabled? | raised exception on `vyper --version`

Anindya-Prithvi commented 2 years ago

Version Information

vyper Version (output of vyper --version): 0.3.1
OS: Arch Linux
Python Version (output of python --version): 3.9.9

What's your issue about?

Error:

└─(00:17:20)──> vyper                                 ──(Tue,Dec07)─┘
Traceback (most recent call last):
  File "/home/kern/.local/bin/vyper", line 5, in <module>
    from vyper.cli.vyper_compile import _parse_cli_args
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/__init__.py", line 1, in <module>
    from vyper.compiler import compile_code, compile_codes  # noqa: F401
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/compiler/__init__.py", line 4, in <module>
    from vyper.compiler import output
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/compiler/output.py", line 7, in <module>
    from vyper.ast import ast_to_dict, parse_natspec
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/ast/__init__.py", line 19, in <module>
    from . import expansion, folding  # noqa: E402
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/ast/folding.py", line 5, in <module>
    from vyper.builtin_functions import DISPATCH_TABLE
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/builtin_functions/__init__.py", line 1, in <module>
    from .functions import *  # noqa: F403
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/builtin_functions/functions.py", line 9, in <module>
    from vyper.builtin_functions.convert import convert
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/builtin_functions/convert.py", line 6, in <module>
    from vyper.builtin_functions.signatures import signature
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/builtin_functions/signatures.py", line 5, in <module>
    from vyper.old_codegen.expr import Expr
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/old_codegen/expr.py", line 13, in <module>
    from vyper.old_codegen import external_call, self_call
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/old_codegen/external_call.py", line 4, in <module>
    from vyper.old_codegen.abi import abi_encode, abi_type_of
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/old_codegen/abi.py", line 4, in <module>
    from vyper.old_codegen.parser_utils import (
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/old_codegen/parser_utils.py", line 42, in <module>
    setcontext(DecimalContextOverride(prec=78))
  File "/usr/lib/python3.9/_pydecimal.py", line 3898, in __init__
    self.prec = prec if prec is not None else dc.prec
  File "/home/kern/.local/lib/python3.9/site-packages/vyper/old_codegen/parser_utils.py", line 38, in __setattr__
    raise DecimalOverrideException("Overriding decimal precision disabled")
vyper.exceptions.DecimalOverrideException: <exception str() failed>

what command you ran (can be replicated with any):
1. vyper (--some args)
2. import vyper (in a python shell)
the code that caused the failure (see this link for help with formatting code) NA
please try running your example with the --debug flag turned on NA

How can it be fixed?

Just comment out the lines

class DecimalContextOverride(Context):
    def __setattr__(self, name, value):
#        if name == "prec":
#            raise DecimalOverrideException("Overriding decimal precision disabled")
        super().__setattr__(name, value)

setcontext(DecimalContextOverride(prec=78))

More context:

I installed eth-brownie without explicitly handling any vyper packages, upon running brownie --version I was greeted with some errors, following the trace I found that the exception was forced? It maybe due to some other issues that such an exception was created which I am honestly unaware of. However, the programs (brownie, vyper) seem to "run" now.