cmp [-q] file1 file2
	compare files for differences

	By convention, file1 is the actual data and file2 is the
	expected data.
	The command succeeds if the file contents are identical.
	File1 can be 'stdout' or 'stderr' to compare the stdout or
	stderr buffer from the most recent command.

cmpenv [-q] file1 file2
	compare files for differences, with environment expansion

	By convention, file1 is the actual data and file2 is the

## For developers

Release notes should be added to `next` by editing existing files or creating
new files. **Do not add RELNOTE=yes comments in CLs.** Instead, add a file to
the CL (or ask the author to do so).

At the end of the development cycle, the files will be merged by being
concatenated in sorted order by pathname. Files in the directory matching the
glob "*stdlib/*minor" are treated specially. They should be in subdirectories

//go:generate echo Fail b

// +build b

package excluded


-- nopkg/a.go --
// Go file with package clause after comment.
// Go generate should process this file.

/* Pre-comment */ package nopkg
//go:generate echo Success a

-- nopkg/b.go --
// Go file with commented package clause.
// Go generate should ignore this file.

//package nopkg

//go:generate echo Fail b

cd mod
go list -e -json=ImportPath,Error ./foo
stdout '"Err": "no Go files in .*(/|\\\\)src(/|\\\\)mod(/|\\\\)foo"'

-- mod/go.mod --
module example.com/foo

go 1.21
-- mod/foo/README.md --

cd rundir

! go run x.go sub/sub.go
stderr 'named files must all be in one directory; have . and sub'
! go run sub/sub.go x.go
stderr 'named files must all be in one directory; have sub and .'

cd ../
go run rundir/foo.go ./rundir/bar.go
stderr 'hello world'

-- rundir/sub/sub.go --
package main
-- rundir/x.go --
package main
-- rundir/foo.go --
package main
func main() { println(msg) }
-- rundir/bar.go --
package main

The zoneinfo.zip archive contains time zone files compiled using
the code and data maintained as part of the IANA Time Zone Database.
The IANA asserts that the database is in the public domain.

For more information, see
https://www.iana.org/time-zones
ftp://ftp.iana.org/tz/code/tz-link.html
https://datatracker.ietf.org/doc/html/rfc6557

env GO111MODULE=off
[short] skip

# This test tests that we can link in-package syso files that provides symbols
# for cgo. See issue 29253.
[!cgo] stop
[!compiler:gc] stop
cc -c -o pkg/o.syso ext.c
go build main.go

-- ext.c --
// +build ignore

int f() { return 42; }
-- pkg/pkg.go --
package pkg

// extern int f(void);
import "C"

func init() {
	if v := C.f(); v != 42 {
		panic(v)
	}
}
-- main.go --

The [Stat] function now sets the [ModeSocket] bit for
files that are Unix sockets on Windows. These files are identified

env GOCACHE=$WORK/cache

# Initial run with simple coverage.
go test -cover ./pkg1 ./pkg2 ./pkg3 ./pkg4
[!GOEXPERIMENT:coverageredesign] stdout 'pkg1	\[no test files\]'
[GOEXPERIMENT:coverageredesign] stdout 'pkg1		coverage: 0.0% of statements'
stdout 'pkg2	\S+	coverage: 0.0% of statements \[no tests to run\]'
stdout 'pkg3	\S+	coverage: 100.0% of statements'

	return cmd.Run()
}

// readCache repeatedly globs for go.mod files in the given cache, then opens
// those files for reading. When the done chan is closed, readCache closes
// files and returns.
func readCache(gopath string, done <-chan struct{}) {
	files := make(map[string]*os.File)
	defer func() {
		for _, f := range files {
			f.Close()
		}
	}()