Bug #10990: bug in regex char class casefold for certain chars

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 1.8.7p374, 1.9.3p194, 2.0.0p481
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[gene91 (Haozhun Jin)]

> "\u00c2" =~ /[\u0­0e0-\u00e5­]/i
=> nil
> "\u00c2" =~ /[\u0­0e2]/i
=> nil
> "\u00c2" =~ /\u00­e2/i
=> 0

The above is the result for 1.9.3p194.

• For 1.9.3p194, it is nil, nil, 0
• For 1.8.7p374, it is 0, 0, nil
• For 2.0.0p481, it is nil, 0, 0

[gene91 (Haozhun Jin)]

The expected result is 0, 0, 0

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

2.0.0p643 works as expected.
1.8 and 1.9 had ended.