Ship ES2015 sloppy-mode const semantics

This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.

R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1571873004

Cr-Commit-Position: refs/heads/master@{#33218}

src/flag-definitions.h

@@ -185,9 +185,9 @@ DEFINE_BOOL(harmony, false, "enable all completed harmony features")
 DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
 DEFINE_IMPLICATION(es_staging, harmony)
 
-DEFINE_BOOL(legacy_const, true, "legacy semantics for const in sloppy mode")
-// ES2015 const semantics are staged
-DEFINE_NEG_IMPLICATION(harmony, legacy_const)
+DEFINE_BOOL(legacy_const, false, "legacy semantics for const in sloppy mode")
+// ES2015 const semantics are shipped
+DEFINE_NEG_VALUE_IMPLICATION(harmony_shipping, legacy_const, true)
 
 DEFINE_BOOL(promise_extra, true, "additional V8 Promise functions")
 // Removing extra Promise functions is staged

test/cctest/compiler/test-run-jsops.cc

@@ -395,6 +395,7 @@ TEST(GlobalLoad) {
 
 
 TEST(GlobalStoreSloppy) {
+  FLAG_legacy_const = true;
   FunctionTester T("(function(a,b) { g = a + b; return g; })");
 
   T.CheckCall(T.Val(33), T.Val(22), T.Val(11));

test/cctest/compiler/test-run-variables.cc

@@ -48,6 +48,7 @@ static const char* bind_tests[] = {
 
 
 static void RunVariableTests(const char* source, const char* tests[]) {
+  i::FLAG_legacy_const = true;
   EmbeddedVector<char, 512> buffer;
 
   for (int i = 0; tests[i] != NULL; i += 3) {

test/cctest/interpreter/test-bytecode-generator.cc

@@ -29,6 +29,7 @@ class BytecodeGeneratorHelper {
     i::FLAG_ignition_filter = StrDup(kFunctionName);
     i::FLAG_always_opt = false;
     i::FLAG_allow_natives_syntax = true;
+    i::FLAG_legacy_const = true;
     CcTest::i_isolate()->interpreter()->Initialize();
   }
 

test/cctest/test-decls.cc

@@ -227,6 +227,7 @@ v8::Local<Integer> DeclarationContext::Query(Local<Name> key) {
 // Test global declaration of a property the interceptor doesn't know
 // about and doesn't handle.
 TEST(Unknown) {
+  i::FLAG_legacy_const = true;
   HandleScope scope(CcTest::isolate());
   v8::V8::Initialize();
 
@@ -276,6 +277,7 @@ class AbsentPropertyContext: public DeclarationContext {
 
 
 TEST(Absent) {
+  i::FLAG_legacy_const = true;
   v8::Isolate* isolate = CcTest::isolate();
   v8::V8::Initialize();
   HandleScope scope(isolate);
@@ -359,6 +361,7 @@ class AppearingPropertyContext: public DeclarationContext {
 
 
 TEST(Appearing) {
+  i::FLAG_legacy_const = true;
   v8::V8::Initialize();
   HandleScope scope(CcTest::isolate());
 
@@ -415,6 +418,7 @@ class ExistsInPrototypeContext: public DeclarationContext {
 
 
 TEST(ExistsInPrototype) {
+  i::FLAG_legacy_const = true;
   HandleScope scope(CcTest::isolate());
 
   // Sanity check to make sure that the holder of the interceptor
@@ -524,6 +528,7 @@ class ExistsInHiddenPrototypeContext: public DeclarationContext {
 
 
 TEST(ExistsInHiddenPrototype) {
+  i::FLAG_legacy_const = true;
   HandleScope scope(CcTest::isolate());
 
   { ExistsInHiddenPrototypeContext context;
@@ -607,6 +612,7 @@ class SimpleContext {
 
 
 TEST(CrossScriptReferences) {
+  i::FLAG_legacy_const = true;
   v8::Isolate* isolate = CcTest::isolate();
   HandleScope scope(isolate);
 

test/cctest/test-parsing.cc

@@ -3571,6 +3571,7 @@ TEST(UseAsmUseCount) {
 
 
 TEST(UseConstLegacyCount) {
+  i::FLAG_legacy_const = true;
   i::Isolate* isolate = CcTest::i_isolate();
   i::HandleScope scope(isolate);
   LocalContext env;
@@ -6425,6 +6426,7 @@ TEST(ArrowFunctionASIErrors) {
 
 TEST(StrongModeFreeVariablesDeclaredByPreviousScript) {
   i::FLAG_strong_mode = true;
+  i::FLAG_legacy_const = true;
   v8::V8::Initialize();
   v8::HandleScope scope(CcTest::isolate());
   v8::Context::Scope context_scope(v8::Context::New(CcTest::isolate()));

test/mjsunit/compiler/regress-96989.js

@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 // Test correct handling of uninitialized const.
 

test/mjsunit/compiler/regress-const.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 // Test const initialization and assignments.
 function f() {

test/mjsunit/const-declaration.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Test handling of const variables in various settings.
 
 (function () {

test/mjsunit/const-eval-init.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 // Test the handling of initialization of deleted const variables.
 // This only makes sense in local scopes since the declaration and

test/mjsunit/const-redecl.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Test for const semantics.
 
 

test/mjsunit/const.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Test const properties and pre/postfix operation.
 function f() {
   const x = 1;

test/mjsunit/constant-folding.js

@@ -29,6 +29,8 @@
 // The code generator now handles compile-time constants specially.
 // Test the code generated when operands are known at compile time
 
+// Flags: --legacy-const
+
 // Test count operations involving constants
 function test_count() {
   var x = "foo";

test/mjsunit/debug-evaluate-const.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug --debug-eval-readonly-locals
+// Flags: --expose-debug-as debug --debug-eval-readonly-locals --legacy-const
 
 Debug = debug.Debug
 

test/mjsunit/declare-locally.js

@@ -33,7 +33,7 @@
 // This exercises the code in runtime.cc in
 // DeclareGlobal...Locally().
 
-// Flags: --es52-globals
+// Flags: --legacy-const
 
 this.__proto__.foo = 42;
 this.__proto__.bar = 87;

test/mjsunit/es6/block-eval-var-over-legacy-const.js

@@ -3,8 +3,10 @@
 // found in the LICENSE file.
 
 // Flags: --harmony-sloppy --harmony-sloppy-let --harmony-sloppy-function
+// Flags: --legacy-const
 
-// Var-let conflict in a function throws, even if the var is in an eval
+// Legacy-const-let conflict in a function throws, even if the legacy const
+// is in an eval
 
 // Throws at the top level of a function
 assertThrows(function() {
@@ -56,7 +58,7 @@ try {
 }
 assertFalse(caught);
 
-// var across with doesn't conflict
+// legacy const across with doesn't conflict
 caught = false;
 try {
   (function() {
@@ -69,7 +71,7 @@ try {
 }
 assertFalse(caught);
 
-// var can still conflict with let across a with
+// legacy const can still conflict with let across a with
 caught = false;
 try {
   (function() {

test/mjsunit/es6/block-let-contextual-sloppy.js

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 // Flags: --harmony-sloppy --harmony-sloppy-let --harmony-destructuring-bind
+// Flags: --legacy-const
 
 // let is usable as a variable with var or legacy const, not let or ES6 const
 

test/mjsunit/global-const-var-conflicts.js

@@ -28,6 +28,8 @@
 // Check that dynamically introducing conflicting consts/vars
 // is silently ignored (and does not lead to exceptions).
 
+// Flags: --legacy-const
+
 var caught = 0;
 
 eval("const a");

test/mjsunit/parallel-optimize-disabled.js

@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --nodead-code-elimination --concurrent-recompilation
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");

test/mjsunit/property-load-across-eval.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Tests loading of properties across eval calls.
 
 var x = 1;

test/mjsunit/regress/regress-1178598.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Regression test cases for issue 1178598.
 
 // Make sure const-initialization doesn't conflict

test/mjsunit/regress/regress-1182832.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 var caught = false;
 try {
   (function () {

test/mjsunit/regress/regress-1199637.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --es52-globals
+// Flags: --allow-natives-syntax --legacy-const
 
 // Make sure that we can introduce global variables (using
 // both var and const) that shadow even READ_ONLY variables

test/mjsunit/regress/regress-1201933.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Make sure this doesn't fail with an assertion
 // failure during lazy compilation.
 

test/mjsunit/regress/regress-1207276.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 try {
   const x=n,Glo0al;
 } catch(e){}

test/mjsunit/regress/regress-1213575.js

@@ -28,6 +28,8 @@
 // Make sure that a const definition does not try
 // to pass 'the hole' to a defined setter.
 
+// Flags: --legacy-const
+
 this.__defineSetter__('x', function(value) { assertTrue(value === 1); });
 
 var caught = false;

test/mjsunit/regress/regress-186.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Make sure that eval can introduce a local variable called __proto__.
 // See http://code.google.com/p/v8/issues/detail?id=186
 

test/mjsunit/regress/regress-3138.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --legacy-const
+
 (function f(){
    assertEquals("function", typeof f);
 })();

test/mjsunit/regress/regress-436896.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 function f(x) {
   const x = 0;

test/mjsunit/regress/regress-641.js

@@ -27,6 +27,8 @@
 
 // Regression test for http://code.google.com/p/v8/issues/detail?id=641.
 
+// Flags: --legacy-const
+
  function f(){
  while (window + 1) {
    const window=[,];

test/mjsunit/regress/regress-799761.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // const variables should be read-only
 const c = 42;
 c = 87;

test/mjsunit/regress/regress-88591.js

@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 // Regression test for a crash.  A data property in the global object's
 // prototype shadowed by a setter in the global object's prototype's
 // prototype would crash or assert when seen by Runtime_DeclareContextSlot.

test/mjsunit/regress/regress-debugger-redirect.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-debug-as debug
+// Flags: --expose-debug-as debug --legacy-const
 
 function f(x) {
   // This function compiles into code that only throws a redeclaration

test/mjsunit/regress/regress-handle-illegal-redeclaration.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --always-opt
+// Flags: --always-opt --legacy-const
 
 var x = 0;
 

test/mozilla/mozilla.status

@@ -98,6 +98,17 @@
   # (https://bugzilla.mozilla.org/show_bug.cgi?id=1220457)
   'js1_5/Regress/regress-418504': [FAIL],
 
+  # ES2015 const redefinition throws, initializers are required, and no
+  # global object properties are made, unlike Mozilla legacy const
+  'js1_5/Regress/regress-103602': [FAIL],
+  'js1_5/Regress/regress-321874': [FAIL],
+  'js1_5/Regress/regress-383674': [FAIL],
+  'js1_5/extensions/regress-452565': [FAIL],
+  'js1_5/extensions/scope-001': [FAIL],
+  # To add insult to injury, these tests time out in debug mode
+  'js1_5/Regress/regress-360969-03': [FAIL, ['mode == debug', TIMEOUT, NO_VARIANTS]],
+  'js1_5/Regress/regress-360969-04': [FAIL, ['mode == debug', TIMEOUT, NO_VARIANTS]],
+
   ##################### SKIPPED TESTS #####################
 
   # This test checks that we behave properly in an out-of-memory
@@ -161,8 +172,6 @@
   ##################### FLAKY TESTS #####################
 
   # These tests time out in debug mode but pass in product mode
-  'js1_5/Regress/regress-360969-03': [PASS, ['mode == debug', TIMEOUT, NO_VARIANTS]],
-  'js1_5/Regress/regress-360969-04': [PASS, ['mode == debug', TIMEOUT, NO_VARIANTS]],
   'js1_5/Regress/regress-360969-05': [PASS, ['mode == debug', TIMEOUT, NO_VARIANTS]],
   'js1_5/Regress/regress-360969-06': [PASS, ['mode == debug', TIMEOUT, NO_VARIANTS]],
   'js1_5/extensions/regress-365527': [PASS, SLOW, ['mode == debug', TIMEOUT, NO_VARIANTS]],

test/test262/test262.status

@@ -62,10 +62,6 @@
   # https://code.google.com/p/v8/issues/detail?id=4405
   'language/block-scope/leave/outermost-binding-updated-in-catch-block-nested-block-let-declaration-unseen-outside-of-block': [PASS, FAIL],
 
-  # https://code.google.com/p/v8/issues/detail?id=3305
-  # This times out in sloppy mode because sloppy const assignment does not throw.
-  'language/statements/const/syntax/const-invalid-assignment-next-expression-for': [SKIP],
-
   # It's unclear what the right behavior for [[Enumerate]] is; we're awaiting
   # clarification in the spec. Currently, our for-in implementation for
   # Proxies checks all trap result values for being strings...

test/webkit/const-without-initializer.js

@@ -21,6 +21,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 description(
 'Tests that declaring a const variable without initializing has the correct behavior and does not crash'
 );

test/webkit/constant-count.js

@@ -21,6 +21,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 description(
 "This test checks exceptional cases for constant counting in the parser."
 );

test/webkit/fast/js/arguments-expected.txt

@@ -157,7 +157,7 @@ PASS access_after_delete_extra_5(1, 2, 3, 4, 5) is 5
 PASS argumentsParam(true) is true
 PASS argumentsFunctionConstructorParam(true) is true
 PASS argumentsVarUndefined() is '[object Arguments]'
-FAIL argumentsConstUndefined() should be [object Arguments]. Threw exception SyntaxError: Identifier 'arguments' has already been declared
+FAIL argumentsConstUndefined() should be [object Arguments]. Threw exception SyntaxError: Missing initializer in const declaration
 PASS argumentCalleeInException() is argumentCalleeInException
 PASS shadowedArgumentsApply([true]) is true
 PASS shadowedArgumentsLength([]) is 0

test/webkit/fast/js/function-toString-parentheses-expected.txt

@@ -512,8 +512,8 @@ PASS compileAndSerializeLeftmostTest('var a, b, c') is 'var a, b, c'
 PASS compileAndSerializeLeftmostTest('var a = 1, b = 2, c = 3') is 'var a = 1, b = 2, c = 3'
 PASS compileAndSerializeLeftmostTest('const a = 1') is 'const a = 1'
 PASS compileAndSerializeLeftmostTest('const a = (1, 2)') is 'const a = (1, 2)'
-PASS compileAndSerializeLeftmostTest('const a, b = 1') is 'const a, b = 1'
-PASS compileAndSerializeLeftmostTest('const a = 1, b') is 'const a = 1, b'
+FAIL compileAndSerializeLeftmostTest('const a, b = 1') should be const a, b = 1. Threw exception SyntaxError: Missing initializer in const declaration
+FAIL compileAndSerializeLeftmostTest('const a = 1, b') should be const a = 1, b. Threw exception SyntaxError: Missing initializer in const declaration
 PASS compileAndSerializeLeftmostTest('const a = 1, b = 1') is 'const a = 1, b = 1'
 PASS compileAndSerializeLeftmostTest('const a = (1, 2), b = 1') is 'const a = (1, 2), b = 1'
 PASS compileAndSerializeLeftmostTest('const a = 1, b = (1, 2)') is 'const a = 1, b = (1, 2)'

test/webkit/fast/js/parser-syntax-check-expected.txt

@@ -325,16 +325,16 @@ PASS Invalid: "function f() { throw }"
 var and const statements
 PASS Valid:   "var a, b = null"
 PASS Valid:   "function f() { var a, b = null }"
-PASS Valid:   "const a = 5, b, c"
-PASS Valid:   "function f() { const a = 5, b, c }"
+FAIL Valid:   "const a = 5, b, c" should NOT throw
+FAIL Valid:   "function f() { const a = 5, b, c }" should NOT throw
 PASS Invalid: "var"
 PASS Invalid: "function f() { var }"
 PASS Invalid: "var = 7"
 PASS Invalid: "function f() { var = 7 }"
 PASS Invalid: "var c (6)"
 PASS Invalid: "function f() { var c (6) }"
-PASS Valid:   "if (a) var a,b; else const b, c"
-PASS Valid:   "function f() { if (a) var a,b; else const b, c }"
+FAIL Valid:   "if (a) var a,b; else const b, c" should NOT throw
+FAIL Valid:   "function f() { if (a) var a,b; else const b, c }" should NOT throw
 PASS Invalid: "var 5 = 6"
 PASS Invalid: "function f() { var 5 = 6 }"
 PASS Valid:   "while (0) var a, b, c=6, d, e, f=5*6, g=f*h, h"
@@ -343,8 +343,8 @@ PASS Invalid: "var a = if (b) { c }"
 PASS Invalid: "function f() { var a = if (b) { c } }"
 PASS Invalid: "var a = var b"
 PASS Invalid: "function f() { var a = var b }"
-PASS Valid:   "const a = b += c, a, a, a = (b - f())"
-PASS Valid:   "function f() { const a = b += c, a, a, a = (b - f()) }"
+FAIL Valid:   "const a = b += c, a, a, a = (b - f())" should NOT throw
+FAIL Valid:   "function f() { const a = b += c, a, a, a = (b - f()) }" should NOT throw
 PASS Invalid: "var a %= b | 5"
 PASS Invalid: "function f() { var a %= b | 5 }"
 PASS Invalid: "var (a) = 5"
@@ -357,8 +357,8 @@ PASS Invalid: "var var = 3"
 PASS Invalid: "function f() { var var = 3 }"
 PASS Valid:   "var varr = 3 in 1"
 PASS Valid:   "function f() { var varr = 3 in 1 }"
-PASS Valid:   "const a, a, a = void 7 - typeof 8, a = 8"
-PASS Valid:   "function f() { const a, a, a = void 7 - typeof 8, a = 8 }"
+FAIL Valid:   "const a, a, a = void 7 - typeof 8, a = 8" should NOT throw
+FAIL Valid:   "function f() { const a, a, a = void 7 - typeof 8, a = 8 }" should NOT throw
 PASS Valid:   "const x_x = 6 /= 7 ? e : f"
 PASS Valid:   "function f() { const x_x = 6 /= 7 ? e : f }"
 PASS Invalid: "var a = ?"
@@ -412,8 +412,8 @@ PASS Valid:   "for (var a = b, c, d ; ; 1 in a()) break"
 PASS Valid:   "function f() { for (var a = b, c, d ; ; 1 in a()) break }"
 PASS Invalid: "for ( ; var a ; ) break"
 PASS Invalid: "function f() { for ( ; var a ; ) break }"
-FAIL Invalid: "for (const a; ; ) break" should throw undefined
-FAIL Invalid: "function f() { for (const a; ; ) break }" should throw undefined
+PASS Invalid: "for (const a; ; ) break"
+PASS Invalid: "function f() { for (const a; ; ) break }"
 PASS Invalid: "for ( %a ; ; ) { }"
 PASS Invalid: "function f() { for ( %a ; ; ) { } }"
 PASS Valid:   "for (a in b) break"