From: "charliesome (Charlie Somerville)" Date: 2014-01-03T18:31:37+09:00 Subject: [ruby-core:59509] [ruby-trunk - Bug #9353][Open] Struct setter methods now return the struct object rather than the value Issue #9353 has been reported by charliesome (Charlie Somerville). ---------------------------------------- Bug #9353: Struct setter methods now return the struct object rather than the value https://bugs.ruby-lang.org/issues/9353 Author: charliesome (Charlie Somerville) Status: Open Priority: Normal Assignee: Category: Target version: ruby -v: ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0] Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN ~ ruby-2.1.0 �� irb >> Struct.new(:foo).new.send(:foo=, 123) => # ~ ruby-2.0.0-p247 �� irb >> Struct.new(:foo).new.send(:foo=, 123) => 123 This looks like a regression introduced by r41534, where rb_struct_set was changed: - return ptr[i] = val; + return RSTRUCT_SET(obj, i, val); The RSTRUCT_SET macro was introduced in this commit, but it returns obj, not val. I have attached a patch fixing this issue. -- http://bugs.ruby-lang.org/