[strong] deprecate empty sub-statements

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index f0c3703b99819c7697c303023e4362cb53804fd7..95ce793405b9d28f74175ccfb0a564796519ed3a 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -5517,3 +5517,33 @@ TEST(VarForbiddenInStrongMode) {
   RunParserSyncTest(sloppy_context_data, let_declarations, kError, NULL, 0,
                     always_flags, arraysize(always_flags));
 }
+
+
+TEST(StrongEmptySubStatements) {
+  const char* sloppy_context_data[][2] = {{"", ""}, {NULL}};
+  const char* strict_context_data[][2] = {{"'use strict';", ""}, {NULL}};
+  const char* strong_context_data[][2] = {{"'use strong';", ""}, {NULL}};
+
+  const char* data[] = {
+      "if (1);",
+      "if (1) {} else;",
+      "while (1);",
+      "do; while (1);",
+      "for (;;);",
+      "for (x in []);",
+      "for (x of []);",
+      "for (const x = 0;;);",
+      "for (const x in []);",
+      "for (const x of []);",
+      NULL};
+
+  static const ParserFlag always_flags[] = {
+      kAllowStrongMode, kAllowHarmonyScoping
+  };
+  RunParserSyncTest(sloppy_context_data, data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
+  RunParserSyncTest(strict_context_data, data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
+  RunParserSyncTest(strong_context_data, data, kError, NULL, 0, always_flags,
+                    arraysize(always_flags));
+}