| errors | Package errors implements functions to manipulate errors. |
| internal/bytealg | |
| internal/godebug | Package godebug makes the settings in the $GODEBUG environment variable available to other packages. |
| internal/stringslite | Package stringslite implements a subset of strings, only using packages that may be imported by "os". |
| internal/syscall/windows/registry | Package registry provides access to the Windows registry. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |
| unsafe | Package unsafe contains operations that step around the type safety of Go programs. |