return nil, nil, err
		}

		compressed, contents, err := machoCompressSection(data)
		if err != nil {
			return nil, nil, err
		}

		newSec := *sect
		newSec.Offset = uint32(dwarfseg.Offset) + uint32(buf.Len())
		newSec.Addr = dwarfseg.Addr + uint64(buf.Len())
		if compressed {
			newSec.Name = "__z" + sect.Name[2:]
			newSec.Size = uint64(len(contents))
		}
		sects = append(sects, &newSec)

	}

	return flows, nil
}

// tempFile creates a temp file containing contents and returns its path.
func tempFile(contents string) string {
	file, err := os.CreateTemp("", "go-tls-test")
	if err != nil {
		panic("failed to create temp file: " + err.Error())
	}
	path := file.Name()
	file.WriteString(contents)
	file.Close()
	return path
}

	// offset of the name field in a 9P directory entry - see syscall.UnmarshalDir()
	nameOffset = 39
)

// goenvs caches the Plan 9 environment variables at start of execution into
// string array envs, to supply the initial contents for os.Environ.
// Subsequent calls to os.Setenv will change this cache, without writing back
// to the (possibly shared) Plan 9 environment, so that Setenv and Getenv

			}
		}

		// deduplicate Content-Length
		header.Del("Content-Length")
		header.Add("Content-Length", first)

		contentLens = header["Content-Length"]
	}

	// Reject requests with invalid Content-Length headers.
	if len(contentLens) > 0 {
		n, err = parseContentLength(contentLens)
		if err != nil {
			return -1, err
		}
	}

	return h.client.Sum(out)
}

// clientSum returns the contents of the verify_data member of a client's
// Finished message.
func (h finishedHash) clientSum(masterSecret []byte) []byte {
	out := make([]byte, finishedVerifyLength)
	h.prf(out, masterSecret, clientFinishedLabel, h.Sum())
	return out
}

// serverSum returns the contents of the verify_data member of a server's
// Finished message.

// includes it in a Last-Modified header in the response. If the
// request includes an If-Modified-Since header, ServeContent uses
// modtime to decide whether the content needs to be sent at all.
//
// The content's Seek method must work: ServeContent uses
// a seek to the end of the content to determine its size.
//
// If the caller has set w's ETag header formatted per RFC 7232, section 2.3,

# run outside the go command.
go test -c -o t.exe -cover
exec ./t.exe

-- go.mod --
module hello

go 1.20
-- hello.go --
package hello

func Hello() {
	println("hello")
}

// contents not especially interesting, just need some code
func foo(n int) int {
	t := 0
	for i := 0; i < n; i++ {
		for j := 0; j < i; j++ {
			t += i ^ j
			if t == 1010101 {
				break
			}
		}
	}
	return t

}

#pragma GCC diagnostic ignored "-Wunknown-pragmas"
#pragma GCC push_options
#pragma GCC target("xsave")
#pragma clang attribute push (__attribute__((target("xsave"))), apply_to=function)

// xgetbv reads the contents of an XCR (Extended Control Register)
// specified in the ECX register into registers EDX:EAX.
// Currently, the only supported value for XCR is 0.
void
gccgoXgetbv(uint32_t *eax, uint32_t *edx)
{

go list -f '{{if eq .ImportPath "example.com/generics"}}{{.Module.GoVersion}}{{end}}' -deps -test example.com/m2/q
stdout 1.18


# At go 1.20 or earlier, 'go mod tidy' should preserve the historical go.sum
# contents, but 'go test' should flag the missing checksums (instead of trying
# to build the test dependency with the wrong language version).

go mod tidy -go=1.20
! go test -o $devnull -c all

	overwrite bool                                   // if true, overwrite go.sum without incorporating its contents
	enabled   bool                                   // whether to use go.sum at all
}

type modSumStatus struct {
	used, dirty bool
}

// Reset resets globals in the modfetch package, so previous loads don't affect
// contents of go.sum files.
func Reset() {
	GoSumFile = ""
	WorkspaceGoSumFiles = nil