Type assertion fails when converting an empty interface value.
A single-value type assertion `val := i.(T)` panics at runtime if the interface `i` does not hold a value of type `T`.
Assuming an `interface{}` / `any` holds a specific type without using the safe comma-ok type assertion pattern.
1package main2 3func main() {4 var val any = "hello world"5 num := val.(int) // Panic: interface conversion: interface {} is string, not int6 println(num)7}1package main2 3import "fmt"4 5func main() {6 var val any = "hello world"7 8 // Fix: Use comma-ok pattern9 if num, ok := val.(int); ok {10 fmt.Println("Integer:", num)11 } else {12 fmt.Println("Value is not an integer")13 }14}Simulate standard system builds to trigger compiler trace records and track memory crashes locally.
`val` holds a string. Asserting `val.(int)` fails because `string` cannot be converted directly to `int` via interface assertion.