cmd/go: add more info in t.Fatal message

Updates #20284

Change-Id: I4d55d6adec4e8efb54285ca27bb4fa39c76582c3
Reviewed-on: https://go-review.googlesource.com/46719
Reviewed-by: Chris Broadfoot <cbro@golang.org>

diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go
index 60c0c6f36978cf05f7a4e032a915d8920b98f7ac..d04759636922b29453b1df2698222ffffe3410ca 100644 (file)
--- a/src/cmd/go/go_test.go
+++ b/src/cmd/go/go_test.go
@@ -4044,7 +4044,7 @@ func TestExecutableGOROOT(t *testing.T) {
                cmd.Env = env
                out, err := cmd.CombinedOutput()
                if err != nil {
-                       t.Fatal(err)
+                       t.Fatalf("%s env GOROOT: %v, %s", exe, err, out)
                }
                goroot, err := filepath.EvalSymlinks(strings.TrimSpace(string(out)))
                if err != nil {