return true
	}
	for _, dotPath := range dotPaths {
		if strings.HasPrefix(arg, dotPath) {
			return true
		}
	}
	return false
}

// importDir is just an error-catching wrapper for build.ImportDir.
func importDir(dir string) *build.Package {
	pkg, err := build.ImportDir(dir, build.ImportComment)
	if err != nil {
		log.Fatal(err)
	}
	return pkg
}

	if len(pkgArgs) == 0 {
		// Caching does not apply to "go test",
		// only to "go test foo" (including "go test .").
		if cache.DebugTest {
			fmt.Fprintf(os.Stderr, "testcache: caching disabled in local directory mode\n")
		}
		c.disableCache = true
		return false
	}

	if a.Package.Root == "" {
		// Caching does not apply to tests outside of any module, GOPATH, or GOROOT.

//	    element in the sequence, if any. Possible parents of matches
//	    are run with b.N=1 to identify sub-benchmarks. For example,
//	    given -bench=X/Y, top-level benchmarks matching X are run
//	    with b.N=1 to find any sub-benchmarks matching Y, which are
//	    then run in full.
//
//	-benchtime t
//	    Run enough iterations of each benchmark to take t, specified

		default:
			return fmt.Sprintf("Did not find a flag matching %s in -d=ssa/%s debug option (expected ssa/build/{debug,test,stats,dump=function_name})", flag, phase)
		}
		return ""
	}
	if phase == "genssa" {
		switch flag {
		case "dump":
			GenssaDump[valString] = true
		default:
			return fmt.Sprintf("Did not find a flag matching %s in -d=ssa/%s debug option (expected ssa/genssa/dump=function_name)", flag, phase)

				// defined type. This ensures that in a series of types, all matching against the
				// same type parameter, we infer a defined type if there is one, independent of
				// order. Type inference or assignment may fail, which is ok.
				// Selecting a defined type, if any, ensures that we don't lose the type name;
				// and since we have inexact unification, a value of equally named or matching
				// undefined type remains assignable (go.dev/issue/43056).

# nopgo should be built without PGO.
! stderr 'compile.*-pgoprofile=.*nopgo(/|\\\\)nopgo\.go'

# Dependencies should also be built with and without PGO.
# Here we want to match a compile action without -pgoprofile,
# by matching 3 occurrences of "compile dep.go", among which
# 2 of them have -pgoprofile (therefore one without).
stderr -count=3 'compile.*dep(/|\\\\)dep.go'
stderr -count=2 'compile.*-pgoprofile=.*dep(/|\\\\)dep\.go'

					err.addAltDecl(alt)
					err.report()
					// ok to continue
				} else {
					b.insert(s)
					check.recordDef(s.Label, lbl)
				}
				// resolve matching forward jumps and remove them from fwdJumps
				i := 0
				for _, jmp := range fwdJumps {
					if jmp.Label.Value == name {
						// match
						lbl.used = true
						check.recordUse(jmp.Label, lbl)

	// that occur while matching or loading packages, and should not terminate the
	// process if such an error occurs.
	//
	// Errors encountered in the module graph will still be reported.
	//
	// The caller may retrieve the silenced package errors using the Lookup
	// function, and matching errors are still populated in the Errs field of the
	// associated search.Match.)

each of which can match any string, including the empty string and
strings containing slashes. Such a pattern expands to all package
directories found in the GOPATH trees with names matching the
patterns.

To make common patterns more convenient, there are two special cases.
First, /... at the end of the pattern can match an empty string,

stderr '^\tTo ignore the vendor directory, use -mod=readonly or -mod=mod.\n\tTo sync the vendor directory, run:\n\t\tgo mod vendor$'

# If the go version is still 1.13, 'go mod vendor' should write a
# matching vendor/modules.txt containing the corrected 1.13 data.
go mod vendor
cmp $WORK/modules-1.13.txt vendor/modules.txt

go list -mod=vendor -f {{.Dir}} -tags tools -e all
stdout '^'$WORK'[/\\]auto$'