Fix edge case for case independent regexp character classes.

src/jsregexp.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4208 matching lines @@
     // Once we've found the end point we look up its uncanonicalization
     // and produce a range for each element.  For instance for [c-f]
     // we look up ['z', 'Z'] and produce [c-f] and [C-F].  We then only
     // add a range if it is not already contained in the input, so [c-f]
     // will be skipped but [C-F] will be added.  If this range is not
     // completely contained in a block we do this for all the blocks
     // covered by the range (handling characters that is not in a block
     // as a "singleton block").
     unibrow::uchar range[unibrow::Ecma262UnCanonicalize::kMaxWidth];
     int pos = bottom;
-    while (pos < top) {
+    while (pos <= top) {
       int length = isolate->jsregexp_canonrange()->get(pos, '\0', range);
       uc16 block_end;
       if (length == 0) {
         block_end = pos;
       } else {
         ASSERT_EQ(1, length);
         block_end = range[0];
       }
       int end = (block_end > top) ? top : block_end;
       length = isolate->jsregexp_uncanonicalize()->get(block_end, '\0', range);
@@ skipping 1094 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal