go build -x .
stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'
! stale runtime/cgo


# After runtime/cgo has been rebuilt and cached, it should not be rebuilt again.

go build -x .
! stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'
! stale runtime/cgo


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

go 1.17
-- m.go --
package m

package main

import (
	"fmt"
	"os"
	"runtime"
)

func main() {
	const N = 10000
	st := new(runtime.MemStats)
	memstats := new(runtime.MemStats)
	runtime.ReadMemStats(st)
	for i := 0; i < N; i++ {
		c := make(chan int, 10)
		_ = c
		if i%100 == 0 {
			for j := 0; j < 4; j++ {
				runtime.GC()
				runtime.Gosched()
				runtime.GC()
				runtime.Gosched()
			}
		}
	}

Not every module contributes to every runtime.

The core-runtime module defines each runtime:

- The target JVM for the runtime. Each runtime has its own JVM compatibility constraints.
- Some base services that are available to code hosted by the runtime. This varies by runtime.
- Additional constraints. For example, the CLI client runtimes limit the libraries that are available to the code in that runtime, for performance reasons. 

	Items []Foo
}

func (s *FooList) DeepCopyObject() runtime.Object { panic("unimplemented") }

type SampleList struct {
	metav1.TypeMeta
	metav1.ListMeta
	Items []Sample
}

func (s *SampleList) DeepCopyObject() runtime.Object { panic("unimplemented") }

type RawExtensionList struct {
	metav1.TypeMeta
	metav1.ListMeta

	Items []runtime.RawExtension
}

	m.gvk = gvk
}

// CacheEncode implements runtime.CacheableObject interface.
func (m *mockCacheableObject) CacheEncode(id runtime.Identifier, encode func(runtime.Object, io.Writer) error, w io.Writer) error {
	return encode(m.obj.DeepCopyObject(), w)
}

// GetObject implements runtime.CacheableObject interface.
func (m *mockCacheableObject) GetObject() runtime.Object {
	return m.obj
}

type mockNamer struct{}

            // Runtime.exec() overloads
            [fromString(), "Runtime.getRuntime().exec(command, new String[] {'FOOBAR=foobar'})", "", "foobar"],
            [fromGroovyString(), "Runtime.getRuntime().exec(command, new String[] {'FOOBAR=foobar'})", "", "foobar"],
            [fromStringArray(), "Runtime.getRuntime().exec(command, new String[] {'FOOBAR=foobar'})", "", "foobar"],

	t.Parallel()
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("no pthreads on %s", runtime.GOOS)
	}
	if testing.Short() {
		switch {
		case runtime.GOOS == "dragonfly":
			t.Skip("see golang.org/issue/11990")
		case runtime.GOOS == "linux" && runtime.GOARCH == "arm":
			t.Skip("too slow for arm builders")
		case runtime.GOOS == "linux" && (runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le"):

		Name:               "runtime",
		StartTime:          cgroupStatsMap["/runtime"].cs.StartTime,
		CPU:                cgroupStatsMap["/runtime"].cs.CPU,
		Memory:             cgroupStatsMap["/runtime"].cs.Memory,
		Accelerators:       cgroupStatsMap["/runtime"].cs.Accelerators,
		UserDefinedMetrics: cgroupStatsMap["/runtime"].cs.UserDefinedMetrics,

func NewFramework(ctx context.Context, fns []RegisterPluginFunc, profileName string, opts ...runtime.Option) (framework.Framework, error) {
	registry := runtime.Registry{}
	profile := &schedulerapi.KubeSchedulerProfile{
		SchedulerName: profileName,
		Plugins:       &schedulerapi.Plugins{},
	}
	for _, f := range fns {
		f(&registry, profile)
	}
	return runtime.NewFramework(ctx, registry, profile, opts...)
}

! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "-"'

env GOFLAGS=--
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "--"'

env GOFLAGS=---oops
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "---oops"'

env GOFLAGS=-=noname
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "-=noname"'

env GOFLAGS=-f
! go list runtime