pc       uintptr
	file     *byte
	lineno   uintptr
	funcName *byte
	entry    uintptr
	more     uintptr
	data     uintptr
}

// printCgoTraceback prints a traceback of callers.
func printCgoTraceback(callers *cgoCallers) {
	if cgoSymbolizer == nil {
		for _, c := range callers {
			if c == 0 {
				break
			}
			print("non-Go function at pc=", hex(c), "\n")
		}