Go Rake for Beginners: 5 Mistakes That Turn Code into Hell

Why Does Go Seem Simple but Breaks Beginners?

Go (or Golang) is a language that was created with one goal: to make programmers suffer less. Minimalistic syntax, built-in concurrency, fast compilation — it seems like you can learn it in a week. And yes, you can learn it. But "writing good code" and "writing code in Go" are two different stories.

Beginners often bring habits from Python, JavaScript, or Java and try to force them onto Go. The result is bugs that are hard to catch, runtime panics, and the feeling that "Go is somehow broken." Spoiler: Go is not broken. It just thinks differently.

In this article, we'll break down the 5 most common mistakes when learning Go. If you're just starting out — read carefully. If you already write in Go — check if you're still making them.

Mistake #1: Ignoring Errors (and the Python Habit)

In Python or JavaScript, you're used to a function returning a result or throwing an exception. You wrap the call in try/catch and live peacefully. In Go, it's different: there are no exceptions. There are only return values, and one of them is an error.

The most popular beginner mistake is writing result, _ := someFunc() and forgetting about the error. Or, even worse, simply not checking it:

// BAD: error is ignored\nfile, _ := os.Open("config.yaml")\n// If the file doesn't exist — file == nil, and the next line will panic\ndefer file.Close()\n

In Go, an error is not something scary. It's just a value. You need to check it. Always. Without exception.

How to do it right?

// GOOD: check the error immediately\nfile, err := os.Open("config.yaml")\nif err != nil {\n    log.Fatalf("failed to open file: %v", err)\n}\ndefer file.Close()\n

This is not paranoia. This is discipline. Go teaches you to be careful. If you ignore an error in production — get ready for a service crash at 3 AM with silence in the logs.

Tip: never use _ for an error unless you are 100% sure it will never occur. And such situations are almost non-existent in real code.

Mistake #2: Panicking Where an Error is Needed

Go has the panic and recover mechanism. Beginners often confuse them with exceptions and start panicking at any problem. This is a mistake.

panic is an emergency stop of the program. It is intended for situations where continuing execution is impossible: for example, dereferencing a nil pointer or accessing an array out of bounds. Using panic for business logic handling is bad form.

// BAD: panic instead of an error\nfunc divide(a, b int) int {\n    if b == 0 {\n        panic("division by zero!")\n    }\n    return a / b\n}\n

The correct approach is to return an error:

// GOOD: return an error\nfunc divide(a, b int) (int, error) {\n    if b == 0 {\n        return 0, fmt.Errorf("division by zero")\n    }\n    return a / b, nil\n}\n

Use panic only for truly critical situations. Everything else is errors. Go gives you error for a reason.

Mistake #3: Incorrect Work with Goroutines and Lack of Synchronization

Goroutines are perhaps the coolest feature of Go. But they are also the most dangerous for beginners. A typical scenario: you launch 1000 goroutines, write to a shared variable — and get a data race.

// BAD: data race\nvar counter int\nfor i := 0; i < 1000; i++ {\n    go func() {\n        counter++ // unsafe!\n    }()\n}\ntime.Sleep(time.Second)\nfmt.Println(counter) // result is unpredictable\n

Why is this a problem? Because counter++ is not an atomic operation. It consists of reading, incrementing, and writing. Two goroutines can read the same value, increment