pkg math/big, type RoundingMode uint8
pkg mime, const BEncoding = 98
pkg mime, const BEncoding WordEncoder
pkg mime, const QEncoding = 113
pkg mime, const QEncoding WordEncoder
pkg mime, func ExtensionsByType(string) ([]string, error)
pkg mime, method (*WordDecoder) Decode(string) (string, error)
pkg mime, method (*WordDecoder) DecodeHeader(string) (string, error)
pkg mime, method (WordEncoder) Encode(string, string) string

pkg net/http, type Client struct, Timeout time.Duration
pkg net/http, type ConnState int
pkg net/http, type Response struct, TLS *tls.ConnectionState
pkg net/http, type Server struct, ConnState func(net.Conn, ConnState)
pkg net/http, type Server struct, ErrorLog *log.Logger
pkg net/http, type Transport struct, TLSHandshakeTimeout time.Duration
pkg regexp/syntax, method (*Inst) MatchRunePos(int32) int

pkg database/sql, type NullInt32 struct
pkg database/sql, type NullInt32 struct, Int32 int32
pkg database/sql, type NullInt32 struct, Valid bool
pkg database/sql, type NullTime struct
pkg database/sql, type NullTime struct, Time time.Time
pkg database/sql, type NullTime struct, Valid bool
pkg debug/dwarf, method (*UnsupportedType) Common() *CommonType
pkg debug/dwarf, method (*UnsupportedType) Size() int64

pkg mime/multipart, method (*Form) RemoveAll() error
pkg mime/multipart, method (*Part) Close() error
pkg mime/multipart, method (*Part) FileName() string
pkg mime/multipart, method (*Part) FormName() string
pkg mime/multipart, method (*Part) Read([]uint8) (int, error)
pkg mime/multipart, method (*Reader) NextPart() (*Part, error)
pkg mime/multipart, method (*Reader) ReadForm(int64) (*Form, error)

pkg syscall (darwin-arm64), const ESPIPE = 29
pkg syscall (darwin-arm64), const ESRCH = 3
pkg syscall (darwin-arm64), const ESTALE = 70
pkg syscall (darwin-arm64), const ETIME = 101
pkg syscall (darwin-arm64), const ETIME Errno
pkg syscall (darwin-arm64), const ETIMEDOUT = 60
pkg syscall (darwin-arm64), const ETOOMANYREFS = 59
pkg syscall (darwin-arm64), const ETXTBSY = 26

pkg syscall (freebsd-arm64), const VSTOP ideal-int
pkg syscall (freebsd-arm64), const VSUSP = 10
pkg syscall (freebsd-arm64), const VSUSP ideal-int
pkg syscall (freebsd-arm64), const VTIME = 17
pkg syscall (freebsd-arm64), const VTIME ideal-int
pkg syscall (freebsd-arm64), const VWERASE = 4
pkg syscall (freebsd-arm64), const VWERASE ideal-int
pkg syscall (freebsd-arm64), const WCONTINUED = 4

### Timer changes

Go 1.23 makes two significant changes to the implementation of
[time.Timer] and [time.Ticker].

First, `Timer`s and `Ticker`s that are no longer referred to by the program
become eligible for garbage collection immediately, even if their
`Stop` methods have not been called.
Earlier versions of Go did not collect unstopped `Timer`s until after
they had fired and never collected unstopped `Ticker`s.

pkg math/bits, func TrailingZeros32(uint32) int
pkg math/bits, func TrailingZeros64(uint64) int
pkg math/bits, func TrailingZeros8(uint8) int
pkg mime, var ErrInvalidMediaParameter error
pkg mime/multipart, type FileHeader struct, Size int64
pkg mime/multipart, var ErrMessageTooLarge error
pkg net, method (*IPConn) SyscallConn() (syscall.RawConn, error)
pkg net, method (*TCPConn) SyscallConn() (syscall.RawConn, error)

### Go 1.23

Go 1.23 changed the channels created by package time to be unbuffered
(synchronous), which makes correct use of the [`Timer.Stop`](/pkg/time/#Timer.Stop)
and [`Timer.Reset`](/pkg/time/#Timer.Reset) method results much easier.
The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,

pkg testing, method (*B) Elapsed() time.Duration #43620
pkg time, const DateOnly = "2006-01-02" #52746
pkg time, const DateOnly ideal-string #52746
pkg time, const DateTime = "2006-01-02 15:04:05" #52746
pkg time, const DateTime ideal-string #52746
pkg time, const TimeOnly = "15:04:05" #52746
pkg time, const TimeOnly ideal-string #52746
pkg time, method (Time) Compare(Time) int #50770