A decimal integer literal with a leading 0 is now an error in strict mode.

src/parsing/scanner.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Features shared by parsing and pre-parsing scanners.
 
 #include "src/parsing/scanner.h"
 
 #include <stdint.h>
 
@@ skipping 60 matching lines @@
 bool Scanner::BookmarkScope::HasBeenApplied() {
   return bookmark_ == kBookmarkWasApplied;
 }
 
 // ----------------------------------------------------------------------------
 // Scanner
 
 Scanner::Scanner(UnicodeCache* unicode_cache)
     : unicode_cache_(unicode_cache),
       octal_pos_(Location::invalid()),
-      decimal_with_leading_zero_pos_(Location::invalid()),
-      found_html_comment_(false) {
-}
-
+      octal_message_(MessageTemplate::kNone),
+      found_html_comment_(false) {}
 
 void Scanner::Initialize(Utf16CharacterStream* source) {
   source_ = source;
   // Need to capture identifiers in order to recognize "get" and "set"
   // in object literals.
   Init();
   // Skip initial whitespace allowing HTML comment ends just like
   // after a newline and scan first token.
   has_line_terminator_before_next_ = true;
   SkipWhiteSpace();
@@ skipping 815 matching lines @@
     x = nx;
     Advance<capture_raw>();
   }
   // Anything except '\0' is an octal escape sequence, illegal in strict mode.
   // Remember the position of octal escape sequences so that an error
   // can be reported later (in strict mode).
   // We don't report the error immediately, because the octal escape can
   // occur before the "use strict" directive.
   if (c != '0' || i > 0) {
     octal_pos_ = Location(source_pos() - i - 1, source_pos() - 1);
+    octal_message_ = MessageTemplate::kStrictOctalEscape;
   }
   return x;
 }
 
 
 Token::Value Scanner::ScanString() {
   uc32 quote = c0_;
   Advance<false, false>();  // consume quote
 
   LiteralScope literal(this);
@@ skipping 193 matching lines @@
         kind = IMPLICIT_OCTAL;
         while (true) {
           if (c0_ == '8' || c0_ == '9') {
             at_start = false;
             kind = DECIMAL_WITH_LEADING_ZERO;
             break;
           }
           if (c0_  < '0' || '7'  < c0_) {
             // Octal literal finished.
             octal_pos_ = Location(start_pos, source_pos());
+            octal_message_ = MessageTemplate::kStrictOctalLiteral;
             break;
           }
           AddLiteralCharAdvance();
         }
       } else if (c0_ == '8' || c0_ == '9') {
         kind = DECIMAL_WITH_LEADING_ZERO;
       }
     }
 
     // Parse decimal digits and allow trailing fractional part.
     if (kind == DECIMAL || kind == DECIMAL_WITH_LEADING_ZERO) {
       if (at_start) {
         uint64_t value = 0;
         while (IsDecimalDigit(c0_)) {
           value = 10 * value + (c0_ - '0');
 
           uc32 first_char = c0_;
           Advance<false, false>();
           AddLiteralChar(first_char);
         }
 
         if (next_.literal_chars->one_byte_literal().length() <= 10 &&
             value <= Smi::kMaxValue && c0_ != '.' && c0_ != 'e' && c0_ != 'E') {
           next_.smi_value_ = static_cast<uint32_t>(value);
           literal.Complete();
           HandleLeadSurrogate();
 
-          if (kind == DECIMAL_WITH_LEADING_ZERO)
-            decimal_with_leading_zero_pos_ = Location(start_pos, source_pos());
+          if (kind == DECIMAL_WITH_LEADING_ZERO) {
+            octal_pos_ = Location(start_pos, source_pos());
+            octal_message_ = MessageTemplate::kStrictOctalLiteral;
+          }
           return Token::SMI;
         }
         HandleLeadSurrogate();
       }
 
       ScanDecimalDigits();  // optional
       if (c0_ == '.') {
         AddLiteralCharAdvance();
         ScanDecimalDigits();  // optional
       }
@@ skipping 19 matching lines @@
   // The source character immediately following a numeric literal must
   // not be an identifier start or a decimal digit; see ECMA-262
   // section 7.8.3, page 17 (note that we read only one decimal digit
   // if the value is 0).
   if (IsDecimalDigit(c0_) ||
       (c0_ != kEndOfInput && unicode_cache_->IsIdentifierStart(c0_)))
     return Token::ILLEGAL;
 
   literal.Complete();
 
-  if (kind == DECIMAL_WITH_LEADING_ZERO)
-    decimal_with_leading_zero_pos_ = Location(start_pos, source_pos());
+  if (kind == DECIMAL_WITH_LEADING_ZERO) {
+    octal_pos_ = Location(start_pos, source_pos());
+    octal_message_ = MessageTemplate::kStrictOctalLiteral;
+  }
   return Token::NUMBER;
 }
 
 
 uc32 Scanner::ScanIdentifierUnicodeEscape() {
   Advance();
   if (c0_ != 'u') return -1;
   Advance();
   return ScanUnicodeEscape<false>();
 }
@@ skipping 423 matching lines @@
   // 2, reset the source to the desired position,
   source_->Seek(position);
   // 3, re-scan, by scanning the look-ahead char + 1 token (next_).
   c0_ = source_->Advance();
   Next();
   DCHECK_EQ(next_.location.beg_pos, position);
 }
 
 }  // namespace internal
 }  // namespace v8