Bug #6167: String#count: wrong result for multiple complements of multi-byte characters

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.3.0]

[john_firebaugh (John Firebaugh)]

"\u0100\u0101".count("^\u0100", "^\u0101")
=> 2

Since multiple arguments are intersected, the expected result is 0. Compare:

"\u0080\u0081".count("^\u0080", "^\u0081")
=> 0

This takes a different path through tr_setup_table and returns the correct result.

Analogous bugs exists in String#squeeze and String#delete, which also use tr_setup_table.

[john_firebaugh (John Firebaugh)]

Other incorrect results:

"\u0100\u0101".count("a", "\u0100")
=> 1
"\u0100\u0101".count("\u0100", "a")
=> 1

Both should be 0.

[naruse (Yui NARUSE)]

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

This issue was solved with changeset r35127.
John, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• string.c (tr_setup_table): fix multiple non latin argument for
  non latin (over 256 characters) tr-like methods.
  [ruby-core:43371] [Bug #6167]