line, err = b.ReadSlice('\n')
	if err == ErrBufferFull {
		// Handle the case where "\r\n" straddles the buffer.
		if len(line) > 0 && line[len(line)-1] == '\r' {
			// Put the '\r' back on buf and drop it from line.
			// Let the next call to ReadLine check for "\r\n".
			if b.r == 0 {
				// should be unreachable
				panic("bufio: tried to rewind past start of buffer")
			}
			b.r--

// It returns (0, io.EOF) when it reaches the end of that file,
// until [Next] is called to advance to the next file.
//
// If the current file is sparse, then the regions marked as a hole
// are read back as NUL-bytes.
//
// Calling Read on special types like [TypeLink], [TypeSymlink], [TypeChar],
// [TypeBlock], [TypeDir], and [TypeFifo] returns (0, [io.EOF]) regardless of what
// the [Header.Size] claims.

The rewritten code does <code>*p = 1</code> and then <code>*p = 3</code>,
allowing a racing thread to read 1 as well.
</p>

<p>
Note that all these optimizations are permitted in C/C++ compilers:
a Go compiler sharing a back end with a C/C++ compiler must take care
to disable optimizations that are invalid for Go.
</p>

<p>
Note that the prohibition on introducing data races
does not apply if the compiler can prove that the races

# CL 108030044 text/scanner: provide facility for custom identifiers, Robert Griesemer <******@****.***>
pkg text/scanner, type Scanner struct, IsIdentRune func(int32, int) bool

# CL 130620043 text/template: add back pointer to Nodes for better error generation, Rob Pike <******@****.***>
pkg text/template/parse, type DotNode struct, embedded NodeType
pkg text/template/parse, type NilNode struct, embedded NodeType

pkg syscall (openbsd-386), const TCP_MAX_SACK ideal-int
pkg syscall (openbsd-386), const TCP_MAX_WINSHIFT ideal-int
pkg syscall (openbsd-386), const TCP_MD5SIG ideal-int
pkg syscall (openbsd-386), const TCP_MSS ideal-int
pkg syscall (openbsd-386), const TCP_NSTATES ideal-int
pkg syscall (openbsd-386), const TCP_SACK_ENABLE ideal-int
pkg syscall (openbsd-386), const TCSAFLUSH ideal-int