cm/go/internal/test: make vet run when using go test -c

Fixes #26451

Change-Id: Icd8d6d55dc42adb5c8953787eec7eb29ba46b2aa
Reviewed-on: https://go-review.googlesource.com/125215Reviewed-by: Ian Lance Taylor <iant@golang.org>

misc/cgo/testsanitizers/cc_test.go

@@ -381,12 +381,13 @@ func (c *config) checkRuntime() (skip bool, err error) {
 		return false, err
 	}
 	cmd.Args = append(cmd.Args, "-dM", "-E", "../../../src/runtime/cgo/libcgo.h")
+	cmdStr := strings.Join(cmd.Args, " ")
 	out, err := cmd.CombinedOutput()
 	if err != nil {
-		return false, fmt.Errorf("%#q exited with %v\n%s", strings.Join(cmd.Args, " "), err, out)
+		return false, fmt.Errorf("%#q exited with %v\n%s", cmdStr, err, out)
 	}
 	if !bytes.Contains(out, []byte("#define CGO_TSAN")) {
-		return true, fmt.Errorf("%#q did not define CGO_TSAN")
+		return true, fmt.Errorf("%#q did not define CGO_TSAN", cmdStr)
 	}
 	return false, nil
 }

src/cmd/go/internal/test/test.go

@@ -892,8 +892,10 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 		}
 		runAction = installAction // make sure runAction != nil even if not running test
 	}
+	var vetRunAction *work.Action
 	if testC {
 		printAction = &work.Action{Mode: "test print (nop)", Package: p, Deps: []*work.Action{runAction}} // nop
+		vetRunAction = printAction
 	} else {
 		// run test
 		c := new(runCache)
@@ -906,12 +908,7 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 			TryCache:   c.tryCache,
 			Objdir:     testDir,
 		}
-		if len(ptest.GoFiles)+len(ptest.CgoFiles) > 0 {
-			addTestVet(b, ptest, runAction, installAction)
-		}
-		if pxtest != nil {
-			addTestVet(b, pxtest, runAction, installAction)
-		}
+		vetRunAction = runAction
 		cleanAction = &work.Action{
 			Mode:       "test clean",
 			Func:       builderCleanTest,
@@ -928,6 +925,14 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 			IgnoreFail: true, // print even if test failed
 		}
 	}
+
+	if len(ptest.GoFiles)+len(ptest.CgoFiles) > 0 {
+		addTestVet(b, ptest, vetRunAction, installAction)
+	}
+	if pxtest != nil {
+		addTestVet(b, pxtest, vetRunAction, installAction)
+	}
+
 	if installAction != nil {
 		if runAction != installAction {
 			installAction.Deps = append(installAction.Deps, runAction)

src/cmd/go/testdata/script/test_compile_binary.txt

+! go test -c compile_binary/...
+stderr 'build comment'
+
+-- compile_binary/foo_test.go --
+//+build foo
+package foo