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Developer finds subtle bug in .env file loading logic

A developer discovered a subtle bug in their project where the server script's environment variable loader failed to find the `.env` file unless executed from a specific directory. This was due to the server script looking for `.env` relative to the current working directory, unlike the client script which correctly resolved it relative to its own file location. The issue was reproduced by changing the working directory, confirming that the server script relied on an unstated assumption about its execution environment, leading to `KeyError` exceptions when credentials were later accessed. AI

IMPACT Minimal impact; a specific bug fix for a personal project.

RANK_REASON Developer discusses a bug in their own project's code, not a general industry release or event.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Developer finds subtle bug in .env file loading logic

COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Enjoy Kumawat ·

    My MCP Server's .env Loader Only Works If You Launch It From One Specific Directory. My MCP Client Doesn't Promise That.

    <p>This repo has two scripts that both read a local <code>.env</code> file at startup: <code>server.py</code> (the MCP server itself) and <code>publish_devto.py</code> (a standalone CLI the scheduled publishing job calls directly). I went looking for drift between the two, since …