Bug #4650: sub/gsub with named group captures discards numbered group captures

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]

[Phlogistique (Noé Rubinstein)]

puts "ab".sub(/(?.)(.)/, "0=\0 1=\1 2=\2 g=\k") # outputs "0=ab 1= 2= g=a"

Expected: "0=ab 1=b 2= g=a"
(or maybe "0=ab 1= 2=b g=a"? Though I think it's the former)

[nobu (Nobuyoshi Nakada)]

It's spec.

Cited from doc/re.rdoc:

Note: A regexp can't use named backreferences and numbered
backreferences simultaneously.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Rejected