Bug #5968: Encoding.compatible? with binary string

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin10.8.0]

[john_firebaugh (John Firebaugh)]

=begin
According to #5920:

The original meaning of Encoding.compatible?(str1, str2) is the encoding of concatenated string.
In other codes, it is
str = str1.dup.concat str2
str.encoding <- this!

But observe:
a = "a".force_encoding("binary")
b = "b".force_encoding("us-ascii")
a.dup.concat(b).encoding #=> #Encoding:ASCII-8BIT
Encoding.compatible?(a, b) #=> #Encoding:US-ASCII

I believe the latter should return #Encoding:ASCII-8BIT.
=end

[naruse (Yui NARUSE)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r34433.
John, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

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• encoding.c (rb_enc_compatible): return ASCII-8BIT even if 2nd string
  is ascii only string. [ruby-core:42354] [Bug #5968]