# Test that we can unset variables, even if initially invalid,
# as long as resulting config is valid.

env GOENV=badenv
env GOOS=
env GOARCH=
env GOEXPERIMENT=

! go env
stderr '^go(\.exe)?: unknown GOEXPERIMENT badexp$'

go env -u GOEXPERIMENT

! go env
stderr '^go: unsupported GOOS/GOARCH pair bados/badarch$'

! go env -u GOOS
stderr '^go: unsupported GOOS/GOARCH pair \w+/badarch$'

! go env -u GOARCH

! go env -w GOMODCACHE=./test
stderr 'go: GOMODCACHE entry is relative; must be absolute path: "./test"'

# go env -w checks validity of GOEXPERIMENT
env GOEXPERIMENT=
! go env -w GOEXPERIMENT=badexp
stderr 'unknown GOEXPERIMENT badexp'
go env -w GOEXPERIMENT=fieldtrack

# go env -w and go env -u work on unknown fields already in the go/env file
cp bad.env $GOENV
go env GOENV
cat $GOENV
go env
! stdout UNKNOWN

package math

// Ldexp is the inverse of [Frexp].
// It returns frac × 2**exp.
//
// Special cases are:
//
//	Ldexp(±0, exp) = ±0
//	Ldexp(±Inf, exp) = ±Inf
//	Ldexp(NaN, exp) = NaN
func Ldexp(frac float64, exp int) float64 {
	if haveArchLdexp {
		return archLdexp(frac, exp)
	}
	return ldexp(frac, exp)
}

func ldexp(frac float64, exp int) float64 {
	// special cases
	switch {

	switch n.(type) {
	case *ast.ArrayType:
		return 1 << nArrayType
	case *ast.AssignStmt:
		return 1 << nAssignStmt
	case *ast.BadDecl:
		return 1 << nBadDecl
	case *ast.BadExpr:
		return 1 << nBadExpr
	case *ast.BadStmt:
		return 1 << nBadStmt
	case *ast.BasicLit:
		return 1 << nBasicLit
	case *ast.BinaryExpr:
		return 1 << nBinaryExpr
	case *ast.BlockStmt:
		return 1 << nBlockStmt

			assert.False(t, uidExp.SatisfiedExpectations(logger, rcKey),
				"Controller %v satisfied expectations before deletion", rcKey)

			for _, p := range rcPodNames {
				uidExp.DeletionObserved(logger, rcKey, p)
			}

			assert.True(t, uidExp.SatisfiedExpectations(logger, rcKey),
				"Controller %v didn't satisfy expectations after deletion", rcKey)

			uidExp.DeleteExpectations(logger, rcKey)

go tool covdata percent -i=data/goodexit
stdout  'coverage:.*[1-9][0-9.]+%'

# Program makes a direct call to os.Exit(1).
env GOCOVERDIR=data/badexit
! exec ./example.exe badexit
! stderr '^warning: GOCOVERDIR not set, no coverage data emitted'
go tool covdata percent -i=data/badexit
stdout  'coverage:.*[1-9][0-9.]+%'

# Program invokes panic.
env GOCOVERDIR=data/panic
! exec ./example.exe panic

go get ./baddep
! go build ./baddep
stderr golang.org[/\\]notx[/\\]useinternal
stderr 'use of internal package golang.org/x/.* not allowed'

# Replacing an internal module should keep it internal to the same paths.
go mod edit -module=golang.org/notx
go mod edit -replace golang.org/x/internal=./replace/golang.org/notx/internal
go get ./throughdep

go get ./baddep
! go build ./baddep

! go test badtest/badexec
! stdout ^ok
stdout ^FAIL\tbadtest/badexec

! go test badtest/badsyntax
! stdout ^ok
stdout ^FAIL\tbadtest/badsyntax

! go test badtest/badvar
! stdout ^ok
stdout ^FAIL\tbadtest/badvar

! go test notest
! stdout ^ok
stderr '^notest.hello.go:6:1: syntax error: non-declaration statement outside function body' # Exercise issue #7108

-- badtest/badexec/x_test.go --
package badexec

func init() {

env GO111MODULE=on

! go get rsc.io/badzip
stderr 'zip for rsc.io/badzip@v1.0.0 has unexpected file rsc.io/badzip@v1.0.0.txt'
! grep rsc.io/badzip go.mod

go mod edit -require rsc.io/badzip@v1.0.0
! go build -mod=mod rsc.io/badzip
stderr 'zip for rsc.io/badzip@v1.0.0 has unexpected file rsc.io/badzip@v1.0.0.txt'

-- go.mod --

		// TODO determine a better range for BadExpr below
		par.List = []*ast.Field{{Type: &ast.BadExpr{pos, pos}}}
		return par
	}

	// recv type must be of the form ["*"] identifier
	recv := par.List[0]
	base := deref(recv.Type)
	if _, isIdent := base.(*ast.Ident); !isIdent {
		p.errorExpected(base.Pos(), "(unqualified) identifier")
		par.List = []*ast.Field{{Type: &ast.BadExpr{recv.Pos(), recv.End()}}}
	}