📝 Error Never Lies: A Systems Programmer's Guide to Truth

Short summary

A systems programmer shares a debugging philosophy: errors never lie, your assumptions do. Using a real Express bug where chaining .json() after .send(200) caused an ERR_HTTP_HEADERS_SENT error, the author illustrates that most bugs occur at interface boundaries and stack traces point directly to the problem. The post advocates reading tracebacks line by line rather than assuming your logic is correct.

• •Most bugs occur at interface boundaries where systems interact
• •Stack traces point directly to the exact line of your mistake
• •The computer executes what you wrote, not what you intended

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