// Common case
		return nil
	}
	if len(cmdOut) == 0 && cmdErr != nil {
		// Just return the error.
		//
		// TODO: This is what we've done for a long time, but it may be a
		// mistake because it loses all of the extra context and results in
		// ultimately less descriptive output. We should probably just take the
		// text of cmdErr as the output in this case and do everything we

			p.StaleReason = "build -a flag in use"
		}
		// Begin saving output for later writing to cache.
		a.output = []byte{}
		return false
	}

	defer func() {
		// Increment counters for cache hits and misses based on the return value
		// of this function. Don't increment counters if we return early because of
		// cfg.BuildA above because we don't even look at the cache in that case.
		if ok {
			counterCacheHit.Inc()

	if tw.err != nil {
		return 0, tw.err
	}
	n, err := tw.curr.ReadFrom(r)
	if err != nil && err != ErrWriteTooLong {
		tw.err = err
	}
	return n, err
}

// Close closes the tar archive by flushing the padding, and writing the footer.
// If the current file (from a prior call to [Writer.WriteHeader]) is not fully written,
// then this returns an error.
func (tw *Writer) Close() error {

	// patterns that did not match any packages.
	SilenceUnmatchedWarnings bool

	// Resolve the query against this module.
	MainModule module.Version

	// If Switcher is non-nil, then LoadPackages passes all encountered errors
	// to Switcher.Error and tries Switcher.Switch before base.ExitIfErrors.
	Switcher gover.Switcher
}

// LoadPackages identifies the set of packages matching the given patterns and

// the low byte is for type info, and the rest of a pointer
// (32 or 64-bit) is for payload, whatever the tagged class.
//
// Note that the specific integers used to identify the
// specific tagged classes can and will change from release
// to release (that's why this stuff is in CF*Internal*.h),
// as can the definition of type info vs payload above.
//
#if __LP64__

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

package gover

import "golang.org/x/mod/modfile"

const (
	// narrowAllVersion is the Go version at which the
	// module-module "all" pattern no longer closes over the dependencies of
	// tests outside of the main module.
	NarrowAllVersion = "1.16"

	// DefaultGoModVersion is the Go version to assume for go.mod files
	// that do not declare a Go version. The go command has been

	conds["verbose"] = script.BoolCondition("testing.Verbose()", testing.Verbose())
	return conds
}

// Run runs the script from the given filename starting at the given initial state.
// When the script completes, Run closes the state.
func Run(t testing.TB, e *script.Engine, s *script.State, filename string, testScript io.Reader) {
	t.Helper()
	err := func() (err error) {
		log := new(strings.Builder)

		var first, last int
		if mask == "*" {
			first = 0
			last = len(passes) - 1
		} else {
			first = passIdxByName(spl[0])
			last = passIdxByName(spl[len(spl)-1])
		}
		if first < 0 || last < 0 || first > last {
			fmt.Printf("range is not valid: %v\n", r)
			return nil
		}
		for p := first; p <= last; p++ {
			ph[passes[p].name] = true
		}
	}

	path, err := exec.LookPath("dot")

	// that if "foo := bar" is unused and removed, we can then detect if
	// "bar" becomes unused as well.
	defining *object
}

// scoped opens a new scope when called, and returns a function which closes
// that same scope. When a scope is closed, unused variables are recorded.
func (u *unusedInspector) scoped() func() {
	outer := u.scope
	u.scope = &scope{outer: outer, objects: map[string]*object{}}
	return func() {

// The answers are correct for an optimizer
// or code generator, but not necessarily typechecking.
// The order chosen is arbitrary, only consistency and division
// into equivalence classes (Types that compare CMPeq) matters.
func (t *Type) Compare(x *Type) Cmp {
	if x == t {
		return CMPeq
	}
	return t.cmp(x)
}

func cmpForNe(x bool) Cmp {
	if x {
		return CMPlt
	}