Golang on ErrorVault — Developer Error Code Dictionary

Fix go-cannot-use-as-type: Type Mismatch in Assignment or Function Call

Tue, 14 Jul 2026 11:17:00 +0800

The cannot use <variable> (type <actual_type>) as type <expected_type> error in Go is a common compilation error that signals a fundamental type mismatch. Go is a statically typed language, meaning that the type of every variable is known at compile time, and strict rules govern how values of different types can interact. This error occurs when you attempt to assign a value of one type to a variable expecting a different, incompatible type, or when passing an argument of an incorrect type to a function. Resolving this error requires a clear understanding of Go’s type system, including explicit type conversions, interface implementations, and proper handling of pointers versus values.

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 go-import-cycle-not-allowed: Resolve circular dependencies in Go package imports

Sun, 05 Jul 2026 17:51:00 +0800

The import cycle not allowed error is a common compilation issue in Go that indicates a circular dependency between packages. This means that Package A imports Package B, and Package B, in turn, imports Package A, either directly or through a chain of other packages. Go’s design explicitly forbids such cycles to ensure clear dependency graphs, predictable package initialization order, and to prevent potential infinite recursion during compilation. Resolving this error typically involves refactoring your code to break these circular relationships, often by introducing new, independent packages or reorganizing existing functionality.

Fix go-undefined-name: Resolve 'undefined: name not found' errors in Go

Fri, 03 Jul 2026 11:17:00 +0800

The go-undefined-name error is a common compilation error in Go, indicating that the Go compiler cannot find the definition for a specific identifier (variable, function, type, or package) within the current scope. This error prevents your program from compiling and running, as the compiler needs to resolve all names to their corresponding definitions to generate executable code. Understanding the various scenarios that lead to this error is crucial for efficient Go development.