Articles tagged "error"

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golang go error import gopath
3 min readBeginner

Fix Go Error: "cannot find package" / "cannot find module providing package" (2026)

Fix Go's "cannot find package" and "cannot find module providing package" errors. Covers the GOPATH-era vs module-era message, import path typos, go get, replace directives, vendoring, and internal package rules.

golang go error panic slice
3 min readBeginner

Fix Go Panic: "index out of range" Runtime Error (2026)

Fix Go's "panic: runtime error: index out of range" crash. Learn how to read the panic message, the len vs cap distinction, and defensive patterns that keep slice and array access safe.

golang go error go.sum go.mod
4 min readBeginner

Fix Go Error: "missing go.sum entry for module providing package" (2026)

Fix Go's "missing go.sum entry for module providing package" error. Learn why go.mod and go.sum diverge, how go mod tidy fixes it, the GOFLAGS=-mod=mod caveat, and vendor mode gotchas.

golang go type error type conversion
6 min readIntermediate

Fix 'cannot use X (type Y) as type Z' in Go — Type Mismatch Guide

Fix 'cannot use X (type Y) as type Z' in Go. Covers explicit conversions, interface satisfaction, pointer vs value receivers, and type assertions with the ok pattern.

golang go error compile variables
5 min readBeginner

Fix 'declared and not used' Error in Go (2026)

Fix Go's 'declared and not used' compile error. Learn why Go enforces this, how to use the blank identifier _, and common cases like loop variables and error returns.

golang go error compile main package
6 min readBeginner

Fix: "function main is undeclared in the main package" in Go

Fix the Go error "runtime.main_main·f: function main is undeclared in the main package". Covers all 5 causes with code examples and step-by-step solutions.

golang go error compile import
5 min readBeginner

Go "imported and not used": Fix the Golang Unused Import Compile Error

Fix the Go error "imported and not used": delete the import, use the package, add _ for side effects, fix alias mistakes, or run goimports -w main.go.

golang go error nil pointer
6 min readIntermediate

Fix 'nil pointer dereference' Panic in Go (2026)

Fix Go's 'nil pointer dereference' runtime panic. Covers nil pointers, nil interfaces, nil maps, uninitialized structs, stack trace reading, and nil-safe patterns.

golang go error compile undefined
6 min readBeginner

Fix 'undefined: functionName' Error in Go (2026)

Fix the Go 'undefined: functionName' compile error. Covers wrong package, unexported names, typos, missing imports, and circular imports with before/after code.

golang go undefined error compile
6 min readBeginner

Fix Golang 'undefined: function' Error — All Causes (2026)

Fix the Golang 'undefined: functionName' compile error. Covers missing imports, wrong package, typos, unexported names, and wrong module path with before/after code.