* compile.c (iseq_compile_each): remove duplicated line event.
  [Bug #10449]
* test/ruby/test_settracefunc.rb: add and fix tests.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48609 b2dd03c8-39d4-4d8f-98ff-823fe69b080e