How to Fix Go cgo Compilation Error: C Compiler Not Found in PATH on Windows/macOS
Building a Go project that uses cgo (directly, or indirectly through a dependency that wraps a C library) fails because Go can't find a C compiler on your...
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Go AWS Lambda Function Cold Start Latency: How to Optimize Package Size
Your Go Lambda function responds quickly once warm, but the first invocation after a period of inactivity is noticeably slower. Cold starts are an inherent...
How to Fix Go net/http Client Leaking File Descriptors Under Heavy Load
Your Go service makes a lot of outbound HTTP requests, and under sustained load, it starts hitting file descriptor limits or degraded performance over time....
How to Fix "MySQL Server Has Gone Away" Error During Query Execution
A query that was working fine suddenly fails mid-execution with MySQL claiming the server disappeared, even though MySQL is clearly still running and other...
How to Fix "panic: runtime error: invalid memory address or nil pointer dereference" in Go
Your Go program crashes at runtime with a panic pointing at memory address 0x0 instead of running normally. This means somewhere in your code, you're calling a...
How to Resolve "Cannot Find Package" Error in Go Modules
Your Go build fails because the compiler can't locate a package you're importing, even though you're fairly sure it exists. In modern Go this almost always...
How to Fix "Goroutine Leak Detected" in Long-Running Go Services
Your Go service's memory and goroutine count climb steadily over time instead of staying stable, and profiling confirms goroutines are piling up without ever...
How to Fix "cannot use type X as type Y in assignment" in Go Interfaces
The Go compiler refuses to let you assign a struct to an interface variable or pass it to a function expecting that interface, even though you're sure your...
How to Fix "go build: command ignored in directory without Go files"
You run go build and nothing happens — no binary, no error output that points at your actual code, just a message saying the directory has no Go files. This...