merge revision(s) r46464: [Backport #9959]

	* vm.c (invoke_block_from_c): move call/return event timing for
	  bmethod. It can invoke inconsistent call event if this call raises
	  argument error.
	  [Bug #9959]

	* vm_insnhelper.c (vm_call_bmethod_body): ditto.

	* test/ruby/test_settracefunc.rb: add a test.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@47013 b2dd03c8-39d4-4d8f-98ff-823fe69b080e