From: nagachika00@... Date: 2014-06-16T15:19:47+00:00 Subject: [ruby-core:63189] [ruby-trunk - Bug #9593] Keyword arguments default argument assignment behaviour not consistent with optional argument Issue #9593 has been updated by Tomoyuki Chikanaga. Hi, I think this change should not be backported to stable branch. I agree about that it is a long standing bug. But it lives too long to change a behavior during stable releases. I'm going to fill 'DONTNEED' in 'Backport' field if there's no objection. ---------------------------------------- Bug #9593: Keyword arguments default argument assignment behaviour not consistent with optional argument https://bugs.ruby-lang.org/issues/9593#change-47240 * Author: Jack Chen * Status: Closed * Priority: Normal * Assignee: Yukihiro Matsumoto * Category: syntax * Target version: current: 2.2.0 * ruby -v: 2.1.1 * Backport: 1.9.3: REQUIRED, 2.0.0: REQUIRED, 2.1: REQUIRED ---------------------------------------- Given the following code: def var 100 end def foo(var: var + 1) puts "var: #{var.inspect}" end def bar(var = var + 1) puts "var: #{var.inspect}" end foo(var: 1) foo rescue p $! bar(1) bar Ruby 2.0.0: var: 1 var: 101 var: 1 var: 101 Ruby 2.1.1: var: 1 # var: 1 var: 101 What appears to be happening is that since 2.1.1, the keyword argument defines `var` as a variable before evaluating the default argument. Personally, I prefer 2.0.0 behaviour, but the way 2.1.1 handles default arguments in non keyword arguments is inconsistent. -- https://bugs.ruby-lang.org/