// then the merged phi is
		//    v = φ(v0, v1, ..., u0, ..., vk, u1, ..., un)
		v.SetArg(i, u.Args[0])
		v.AddArgs(u.Args[1:]...)
	} else {
		// If the original block contained u = φ(u0, u1, ..., un) and
		// the current phi is
		//    v = φ(v0, v1, ...,  vi, ..., vk)
		// i.e. it does not use a value from the predecessor block,
		// then the merged phi is
		//    v = φ(v0, v1, ..., vk, vi, vi, ...)

# (this also populates tiles on the sumdb server).
cp go.mod.orig go.mod
env GOSUMDB=$sumdb' '$proxy/sumdb-wrong
! go get rsc.io/quote
stderr 'go: rsc.io/quote@v1.5.2: verifying module: checksum mismatch'
stderr 'downloaded: h1:3fEy'
stderr 'localhost.localdev/sumdb: h1:wrong'
stderr 'SECURITY ERROR\nThis download does NOT match the one reported by the checksum server.'
! go get rsc.io/sampler
! go get golang.org/x/text

func (m *mstate) Usage(msg string) {
	if len(msg) > 0 {
		fmt.Fprintf(os.Stderr, "error: %s\n", msg)
	}
	fmt.Fprintf(os.Stderr, "usage: go tool covdata merge -i=<directories> -o=<dir>\n\n")
	flag.PrintDefaults()
	fmt.Fprintf(os.Stderr, "\nExamples:\n\n")
	fmt.Fprintf(os.Stderr, "  go tool covdata merge -i=dir1,dir2,dir3 -o=outdir\n\n")
	fmt.Fprintf(os.Stderr, "  \tmerges all files in dir1/dir2/dir3\n")
	fmt.Fprintf(os.Stderr, "  \tinto output dir outdir\n")

// license that can be found in the LICENSE file.

// Test that the error message for an unrepresentable typedef in a
// union appears on the right line. This test is only run if the size
// of long double is larger than 64.

package main

/*
typedef long double             Float128;

typedef struct SV {
    union {
        Float128         float128;
    } value;
} SV;
*/
import "C"

type ts struct {

env GO111MODULE=off

# Coverage analysis should use 'set' mode by default,
# and should merge coverage profiles correctly.

[short] skip
[compiler:gccgo] skip # gccgo has no cover tool

go test -short -cover encoding/binary errors -coverprofile=$WORK/cover.out
! stderr '[^0-9]0\.0%'
! stdout '[^0-9]0\.0%'

grep -count=1 '^mode: set$' $WORK/cover.out
grep 'errors\.go' $WORK/cover.out
grep 'binary\.go' $WORK/cover.out

[!race] stop

	if err != nil {
		base.Fatalf("%v", err)
	}
	_, err = fmt.Fprintf(f, "mode: %s\n", cfg.BuildCoverMode)
	if err != nil {
		base.Fatalf("%v", err)
	}
	coverMerge.f = f
}

// mergeCoverProfile merges file into the profile stored in testCoverProfile.
// It prints any errors it encounters to ew.
func mergeCoverProfile(ew io.Writer, file string) {
	if coverMerge.f == nil {
		return
	}
	coverMerge.Lock()

	// Plan 9 uses a mode bit instead of explicit lock/unlock syscalls.
	//
	// Per http://man.cat-v.org/plan_9/5/stat: “Exclusive use files may be open
	// for I/O by only one fid at a time across all clients of the server. If a
	// second open is attempted, it draws an error.”
	//
	// So we can try to open a locked file, but if it fails we're on our own to
	// figure out when it becomes available. We'll use exponential backoff with

grep 'rsc.io' $WORK/covdata/out.txt
grep 'bufio/bufio.go:' $WORK/covdata/out.txt

# Use the covdata tool to select a specific set of module paths
mkdir $WORK/covdata2
go tool covdata merge -pkg=rsc.io/quote -i=$WORK/covdata -o=$WORK/covdata2

# Examine the result.
go tool covdata percent -i=$WORK/covdata2
stdout  'coverage:.*[1-9][0-9.]+%'

// license that can be found in the LICENSE file.

package syntax

import "fmt"

// PosMax is the largest line or column value that can be represented without loss.
// Incoming values (arguments) larger than PosMax will be set to PosMax.
//
// Keep this consistent with maxLineCol in go/scanner.
const PosMax = 1 << 30

// A Pos represents an absolute (line, col) source position

[short] skip

env GO111MODULE=on
env GOSUMDB=off
env GOPROXY=direct

# Server responses should be truncated to some reasonable number of lines.
# (For now, exactly eight.)
! go list -m vcs-test.golang.org/auth/ormanylines@latest
stderr '\tserver response:\n(.|\n)*\tline 8\n\t\[Truncated: too many lines.\]$'

# Server responses should be truncated to some reasonable number of characters.
! go list -m vcs-test.golang.org/auth/oronelongline@latest