fail := func() {
		var buf bytes.Buffer
		show := func(i int, lines []string) {
			for k := -2; k < 5; k++ {
				marker := ""
				if k == 0 {
					marker = "» "
				}
				if 0 <= i+k && i+k < len(lines) {
					fmt.Fprintf(&buf, "\t%s%s\n", marker, lines[i+k])
				}
			}
			if i >= len(lines) {
				// show marker after end of input
				fmt.Fprintf(&buf, "\t» \n")
			}
		}

[trimpath] env GOROOT=
[trimpath] ! go env GOROOT
[trimpath] stderr '^go: cannot find GOROOT directory: ''go'' binary is trimmed and GOROOT is not set$'
[trimpath] env GOROOT=$TESTGO_GOROOT

[short] stop

# With GOROOT still set, 'go build' and 'go test -c'
# should cause runtime.GOROOT() to report either the correct GOROOT
# (without -trimpath) or no GOROOT at all (with -trimpath).

go build -o example.exe .

! 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

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

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

# GIT_CONFIG_GLOBAL suffices for git 2.32.0 and newer.
# For older git versions we also set $HOME.
env GIT_CONFIG_GLOBAL=$WORK${/}home${/}gopher${/}.gitconfig
env HOME=$WORK${/}home${/}gopher
exec git config --global --show-origin user.name
stdout 'Go Gopher'

# Inject a local repo in place of a remote one, so that we can
# add commits to the repo partway through the test.
env GIT_ALLOW_PROTOCOL=file
env GOPRIVATE=github.com/golang/issue53955

[short] skip
[!cgo] skip '-buildmode=c-shared requires external linking'
[!buildmode:c-shared] stop

env GO111MODULE=on

go get rsc.io/fortune
go build -buildmode=c-shared -o external.so rsc.io/fortune
go version external.so
stdout '^external.so: .+'
go version -m external.so
stdout '^\tpath\trsc.io/fortune'
stdout '^\tmod\trsc.io/fortune\tv1.0.0'

-- go.mod --
module m

-- empty.go --
package main

  int32_t * volatile q = (int32_t *)malloc(sizeof(int32_t) * n);
  memcpy(p, q, n * sizeof(*p));
  free(q);
}

void g(int32_t *p, int n) {
  if (p[4] != 1) {
    // We shouldn't get here; msan should stop us first.
    exit(0);
  }
}
*/
import "C"

import (
	"unsafe"
)

func main() {
	a := make([]int32, 10)
	C.f((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a)))
	a[3] = 1

env GO111MODULE=on

# GOPROXY file paths must provide the "file://" prefix explicitly.
env GOPROXY=$WORK/proxydir
! go list -versions -m golang.org/x/text
stderr 'invalid proxy URL.*proxydir'

[!net:proxy.golang.org] stop

# GOPROXY HTTPS paths may elide the "https://" prefix.
# (See golang.org/issue/32191.)
env GOPROXY=proxy.golang.org
env GOSUMDB=
go list -versions -m golang.org/x/text

-- go.mod --
module example.com
go 1.13

package main

/*
#include <stdlib.h>
#include <stdio.h>

void test(int* a) {
	// Access Go pointer out of bounds.
	a[3] = 300;          // BOOM
	// We shouldn't get here; asan should stop us first.
	printf("a[3]=%d\n", a[3]);
}*/
import "C"

func main() {
	var cIntArray [2]C.int
	C.test(&cIntArray[0]) // cIntArray is moved to heap.

git init

at 2021-08-11T13:52:00-04:00
git add cmd
git commit -m 'add cmd/issue47650'
git branch -m main
git tag v0.1.0

git add go.mod
git commit -m 'add go.mod'

git show-ref --tags --heads
cmp stdout .git-refs

git log --oneline --decorate=short
cmp stdout .git-log

-- .git-refs --
21535ef346c3e79fd09edd75bd4725f06c828e43 refs/heads/main

	go func() {
		f()
		close(done)
	}()

	timer := time.NewTimer(quiescent)
	defer timer.Stop()
	select {
	case <-done:
		t.Fatalf("%s unexpectedly did not block", desc)
	case <-timer.C:
	}

	return func(t *testing.T) {
		logTimer := time.NewTimer(quiescent)
		defer logTimer.Stop()

		select {
		case <-logTimer.C:
			// We expect the operation to have unblocked by now,