.

go/internal/xtracing/tracetest/tracetest.go

@@ -559,7 +559,10 @@ func run(t testing.TB, f func(t *T), delayInjectTab map[string]*delayInjectState
 }
 
 // Verify verifies a test system.
-// XXX
+//
+// It runs f under T environment, catching race conditions, deadlocks and
+// unexpected events. f is rerun several times and should not alter its
+// behaviour from run to run.
 func Verify(t *testing.T, f func(t *T)) {
 	tT0 := run(t, f, nil)