merge revision(s) 43888: [Backport #9169]

	* common.mk (Doxyfile): tool/file2lastrev.rb needs running with
	  BASERUBY since r43617.  [ruby-dev:47823] [Bug #9169]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43904 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 43853: [Backport #9157]

	* file.c (rb_readlink): fix buffer overflow on a long symlink. since
	  rb_str_modify_expand() expands from its length but not its capacity,
	  need to set the length properly for each expansion.
	  [ruby-core:58592] [Bug #9157]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 39594,39596: [Backport #8010]

	* enumerator.c (enumerator_with_index_i): allow Bignum as offset, to
	  get rid of conversion exception and integer overflow.
	  [ruby-dev:47131] [Bug #8010]

	* enumerator.c (enumerator_with_index):  Restore handling of a nil memo
	  from r39594.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 43929: [Backport #9178]

	* enumerator.c (enumerator_with_index): should not store local variable
	  address to memoise the arguments.  it is invalidated after the return.
	  [ruby-core:58692] [Bug #9178]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e