[es6] Implement proper TDZ for parameters

test/test262-es6/test262-es6.status

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@@ skipping 418 matching lines @@
 
   # https://code.google.com/p/v8/issues/detail?id=4245
   'built-ins/String/prototype/split/S15.5.4.14_A2_T37': [FAIL],
 
   # The order of adding the name property is wrong
   # https://code.google.com/p/v8/issues/detail?id=4199
   'language/computed-property-names/class/static/method-number': [FAIL, FAIL_SLOPPY],
   'language/computed-property-names/class/static/method-symbol': [FAIL, FAIL_SLOPPY],
   'language/computed-property-names/class/static/method-string': [FAIL, FAIL_SLOPPY],
 
+  # This should work as soon as rest parameters are re-implemented via desaguring.
+  'language/expressions/arrow-function/syntax/early-errors/arrowparameters-cover-no-duplicates-rest': [PASS, FAIL],
+
   # https://code.google.com/p/v8/issues/detail?id=2160
   'language/expressions/arrow-function/syntax/arrowparameters-cover-initialize-1': [FAIL],
   'language/expressions/arrow-function/syntax/arrowparameters-cover-initialize-2': [FAIL],
   'language/expressions/object/method-definition/generator-super-prop-param': [FAIL],
   'language/expressions/object/method-definition/name-param-init-yield': [FAIL],
   'language/expressions/object/method-definition/name-super-prop-param': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=3673
   'language/statements/class/definition/basics': [FAIL],
 
@@ skipping 303 matching lines @@
 
   # BUG(3251225): Tests that timeout with --nocrankshaft.
   'built-ins/decodeURI/S15.1.3.1_A2.4_T1': [SKIP],
   'built-ins/decodeURI/S15.1.3.1_A2.5_T1': [SKIP],
   'built-ins/decodeURIComponent/S15.1.3.2_A2.4_T1': [SKIP],
   'built-ins/decodeURIComponent/S15.1.3.2_A2.5_T1': [SKIP],
   'built-ins/encodeURI/S15.1.3.3_A2.3_T1': [SKIP],
   'built-ins/encodeURIComponent/S15.1.3.4_A2.3_T1': [SKIP],
 }],  # 'arch == arm or arch == mipsel or arch == mips or arch == arm64'
 ]