if (consoleMetaData.isStdOut() && consoleMetaData.isStdErr()) {
            // Redirect stderr to stdout when both stdout and stderr are attached to a console. Assume that they are attached to the same console
            // This avoids interleaving problems when stdout and stderr end up at the same location

! stderr switching
stderr 'rsc.io/needgo122@v0.0.1 requires go >= 1.22'
stderr 'rsc.io/needgo123@v0.0.1 requires go >= 1.23'
stderr 'rsc.io/needall@v0.0.1 requires go >= 1.23'
stderr 'requires go >= 1.23'
! stderr 'requires go >= 1.21' # that's us!


# JSON output should be emitted exactly once,
# and non-JSON output should go to stderr instead of stdout.
env GOTOOLCHAIN=auto

! go run -unknownflag rsc.io/fortune/nonexist@v0.0.1
! stderr switching
stderr '^flag provided but not defined: -unknownflag'

! go run -unknownflag oops rsc.io/fortune/nonexist@v0.0.1
! stderr switching
stderr '^flag provided but not defined: -unknownflag'

# go run can handle unknown flag with argument.
! go run -unknown=flag rsc.io/fortune/nonexist@v0.0.1

! stdout '^example.com/noread$'
! stderr 'matched no packages'

! go list example.com/noread
! stdout '^example.com/noread$'
! stderr 'matched no packages'

# Check filesystem-relative patterns.

! go list ./...
! stdout '^example.com/noread$'
! stderr 'matched no packages'
stderr '^pattern ./...: '

! go list ./noread/...
! stdout '^example.com/noread$'
! stderr 'matched no packages'

# Building a nonexistent std package directly should fail usefully.

! go build -mod=readonly nonexist
! stderr 'import lookup disabled'
! stderr 'missing dot'
stderr '^package nonexist is not in std \('$GOROOT'[/\\]src[/\\]nonexist\)$'

! go build nonexist
! stderr 'import lookup disabled'
! stderr 'missing dot'
stderr '^package nonexist is not in std \('$GOROOT'[/\\]src[/\\]nonexist\)$'

# go doc --help
! go doc --help
stderr 'go doc'
stderr 'go doc <pkg>'
stderr 'go doc <sym>\[\.<methodOrField>\]'
stderr 'go doc \[<pkg>\.\]<sym>\[\.<methodOrField>\]'
stderr 'go doc \[<pkg>\.\]\[<sym>\.\]<methodOrField>'
stderr 'go doc <pkg> <sym>\[\.<methodOrField>\]'

# go help doc
go help doc
stdout 'go doc'
stdout 'go doc <pkg>'
stdout 'go doc <sym>\[\.<methodOrField>\]'
stdout 'go doc \[<pkg>\.\]<sym>\[\.<methodOrField>\]'

go list -x -m all  # Download go.mod files.
! stderr github
stderr proxy.golang.org/rsc.io/quote
! stderr sum.golang.org/tile
! stderr sum.golang.org/lookup/rsc.io/quote

go list -x -deps rsc.io/quote  # Download module source.
! stderr github
stderr proxy.golang.org/rsc.io/quote
! stderr sum.golang.org/tile
! stderr sum.golang.org/lookup/rsc.io/quote

cmp go.sum saved.sum

stderr -count=3 'compile.*dep2(/|\\\\)dep2.go'
stderr -count=2 'compile.*-pgoprofile=.*dep2(/|\\\\)dep2\.go'

stderr -count=3 'compile.*dep3(/|\\\\)dep3.go'
stderr -count=2 'compile.*-pgoprofile=.*dep3(/|\\\\)dep3\.go'

# check that pgo appears or not in build info as expected
stderr 'path\\ttest/a\\n.*build\\t-pgo=.*a(/|\\\\)default\.pgo'
stderr 'path\\ttest/b\\n.*build\\t-pgo=.*b(/|\\\\)default\.pgo'
! stderr 'path\\ttest/nopgo\\n.*build\\t-pgo='

		exit(EXIT_FAILURE);
	}

	if (verbose) {
		fprintf(stderr, "calling dlsym\n");
	}

	// Make sure that a SIGSEGV in Go causes a run-time panic.
	fn = (void (*)(void))dlsym(handle, "TestSEGV");
	if (fn == NULL) {
		fprintf(stderr, "%s\n", dlerror());
		exit(EXIT_FAILURE);
	}

	if (verbose) {
		fprintf(stderr, "calling TestSEGV\n");
	}

	fn();

        expect:
        detector.console != null
        detector.console.stdOut
        !detector.console.stdErr
    }

    @Requires(UnitTestPreconditions.SmartTerminalAvailable)
    def "returns metadata when only stderr is attached to console"() {
        given:
        terminals.isTerminal(Terminals.Output.Stdout) >> false
        terminals.isTerminal(Terminals.Output.Stderr) >> true