Allow lexically declared "arguments" in function scope in sloppy mode.

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

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index c71e3ef034e1ee62dd6e5f0e474088e5af68f5c7..f1001a8fe5e4c42804088ecddbe5784c817f85c7 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -64,6 +64,15 @@ namespace interpreter {
   REPEAT_8_UNIQUE_VARS()         \
   UNIQUE_VAR()
 
+#define REPEAT_250_UNIQUE_VARS() \
+  REPEAT_128_UNIQUE_VARS()       \
+  REPEAT_64_UNIQUE_VARS()        \
+  REPEAT_32_UNIQUE_VARS()        \
+  REPEAT_16_UNIQUE_VARS()        \
+  REPEAT_8_UNIQUE_VARS()         \
+  UNIQUE_VAR()                   \
+  UNIQUE_VAR()
+
 static const char* kGoldenFileDirectory =
     "test/cctest/interpreter/bytecode_expectations/";
 
@@ -1353,7 +1362,7 @@ TEST(ContextVariables) {
     "{ let b = 2; return function() { a + b; }; }\n",
 
     "'use strict';\n"
-    REPEAT_249_UNIQUE_VARS()
+    REPEAT_250_UNIQUE_VARS()
     "eval();\n"
     "var b = 100;\n"
     "return b\n",