all: remove unneeded loop variables in tests

Fixes #76411

Author: plamerdimak

src/cmd/api/api_test.go

@@ -232,7 +232,6 @@ var warmupCache = sync.OnceFunc(func() {
 	// Warm up the import cache in parallel.
 	var wg sync.WaitGroup
 	for _, context := range contexts {
-		context := context
 		wg.Add(1)
 		go func() {
 			defer wg.Done()

src/cmd/cgo/internal/testerrors/errors_test.go

@@ -152,7 +152,6 @@ func TestToleratesOptimizationFlag(t *testing.T) {
 		"",
 		"-O",
 	} {
-		cflags := cflags
 		t.Run(cflags, func(t *testing.T) {
 			testenv.MustHaveGoBuild(t)
 			testenv.MustHaveCGO(t)

src/cmd/cgo/internal/testsanitizers/asan_test.go

@@ -48,7 +48,6 @@ func TestASAN(t *testing.T) {
 		{src: "arena_fail.go", memoryAccessError: "use-after-poison", errorLocation: "arena_fail.go:26", experiments: []string{"arenas"}},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()

src/cmd/cgo/internal/testsanitizers/cshared_test.go

@@ -54,7 +54,6 @@ func TestShared(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		//The memory sanitizer tests require support for the -msan option.
 		if tc.sanitizer == "memory" && !platform.MSanSupported(GOOS, GOARCH) {

src/cmd/cgo/internal/testsanitizers/libfuzzer_test.go

@@ -43,7 +43,6 @@ func TestLibFuzzer(t *testing.T) {
 		{goSrc: "libfuzzer2.go", cSrc: "libfuzzer2.c", expectedError: "panic: found it"},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.goSrc, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()

src/cmd/cgo/internal/testsanitizers/msan_test.go

@@ -62,7 +62,6 @@ func TestMSAN(t *testing.T) {
 		{src: "arena_fail.go", wantErr: true, experiments: []string{"arenas"}},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()

src/cmd/cgo/internal/testsanitizers/tsan_test.go

@@ -59,7 +59,6 @@ func TestTSAN(t *testing.T) {
 		{src: "tsan_tracebackctxt", needsRuntime: true}, // Subdirectory
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()

src/cmd/cgo/internal/teststdio/stdio_test.go

@@ -56,7 +56,6 @@ func TestTestRun(t *testing.T) {
 		"fib.go",
 		"hello.go",
 	} {
-		file := file
 		wantFile := strings.Replace(file, ".go", ".out", 1)
 		t.Run(file, func(t *testing.T) {
 			cmd := exec.Command(testenv.GoToolPath(t), "run", file)

src/cmd/compile/internal/test/reproduciblebuilds_test.go

@@ -26,7 +26,6 @@ func TestReproducibleBuilds(t *testing.T) {
 	}
 	t.Parallel()
 	for _, test := range tests {
-		test := test
 		t.Run(test, func(t *testing.T) {
 			t.Parallel()
 			var want []byte

src/cmd/compile/internal/test/ssa_test.go

@@ -163,7 +163,6 @@ func TestCode(t *testing.T) {
 
 		// Now we have a test binary. Run it with all the tests as subtests of this one.
 		for _, test := range tests {
-			test := test
 			if flag == ",softfloat" && !test.usesFloat {
 				// No point in running the soft float version if the test doesn't use floats.
 				continue