* hash.c (w32_getenv): should be static.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43965 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
signal.c: fault address

* signal.c (sigbus, sigsegv): show fault address in the bug message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43966 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rdoc/constant.rb: reapply r43006 for workaround of

 NoMethodError
* lib/rdoc/constant.rb (RDoc::Constant#documented?): workaround for
  NoMethodError when the original of alias is not found.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43967 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* string.c (rb_fstring): Use st_update instead of st_lookup +
  st_insert.
* string.c (fstr_update_callback): New callback for st_update.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43968 b2dd03c8-39d4-4d8f-98ff-823fe69b080e