Error on ErrorVault — Developer Error Code Dictionary

Fix go-slice-bounds-out-of-range: Resolve runtime errors due to invalid slice indexing

Wed, 08 Jul 2026 17:51:00 +0800

The go-slice-bounds-out-of-range error is a common runtime panic in Go applications, indicating an attempt to access an element of a slice at an index that does not exist within its current length. This error is a critical safety mechanism in Go, preventing memory corruption and unpredictable program behavior that could arise from accessing memory outside the bounds of an allocated slice. Understanding its causes and systematic debugging is crucial for robust Go development.

Fix StopIteration: Unexpectedly raised from generator or iterator exhaustion

Wed, 08 Jul 2026 09:25:00 +0800

The StopIteration exception in Python is a fundamental part of the iteration protocol. While it’s an expected signal for for loops to terminate gracefully, it can manifest as an error when explicitly calling next() on an exhausted iterator or generator without proper handling. This article will guide you through understanding its symptoms, root causes, and providing robust solutions.

1. Symptoms: Clear description of indicators and shell output.

When StopIteration is raised unexpectedly, your Python program will typically terminate with a traceback. The key indicator is the StopIteration exception itself, often appearing when you’re manually advancing an iterator or generator.

Fix docker-network-not-found: Resolve Docker Compose 'network not found' errors

Sun, 05 Jul 2026 14:34:00 +0800

The docker-network-not-found error typically occurs when Docker Compose attempts to start services that are configured to use a specific network, but that network is either not defined within the docker-compose.yml file or does not exist as an external network on the Docker host. This issue prevents containers from being created and communicating as intended, leading to a failed deployment of your multi-container application. Understanding the various ways networks are declared and managed in Docker Compose is crucial for resolving this common problem.

Fix docker-container-already-in-use: Container name already in use by another Docker container

Fri, 03 Jul 2026 17:51:00 +0800

When working with Docker, encountering the docker-container-already-in-use error indicates a naming conflict. Docker requires that all container names within a given Docker daemon instance are unique. This error prevents you from creating or starting a new container with a name that is already assigned to an existing container, regardless of whether that existing container is currently running, stopped, or exited. Resolving this issue involves either managing the conflicting container or choosing a different name for your new container.