[Issue 12455] New: [uni][reg] Bad lowercase mapping for 'LATIN CAPITAL LETTER I WITH DOT ABOVE'

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12455

           Summary: [uni][reg] Bad lowercase mapping for 'LATIN CAPITAL
                    LETTER I WITH DOT ABOVE'
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: regression
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: monarchdodra at gmail.com


--- Comment #0 from monarchdodra at gmail.com 2014-03-24 14:29:30 PDT ---
Used in Turkish (or so I've heard).

Worked in 2.063.2. Broke in 2.064

void main()
{
    auto c = 'İ'; // '\U0130' LATIN CAPITAL LETTER I WITH DOT ABOVE
    assert(std.uni.isUpper(c)); //Passes
    assert(c != std.uni.toLower(c)); //Fails
}

Seems to be really specific to that particular letter. For example, U+012F to
U+0134 are correctly mapped (excluding U+0130 of course). In particular,
U+0131, which is "LATIN SMALL LETTER DOTLESS I", correctly maps to "LATIN
CAPITAL LETTER I" (U+49)

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