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[Bug 27878] Big5 : handling of U+5341(and potentially other dupe points) is incompatible with Firefox, Chrome and IE 11

From: <bugzilla@jessica.w3.org>
Date: Wed, 21 Jan 2015 20:41:17 +0000
To: www-international@w3.org
Message-ID: <bug-27878-4285-HtH5BkjH3h@http.www.w3.org/Bugs/Public/>

--- Comment #2 from Jungshik Shin <jshin@chromium.org> ---
I meant to copy'n'paste these steps for Big5 encoding, which makes most of
HKSCSC extension decoding-only (toUnicode). 

5. Let lead be pointer / 157 + 0x81.

6. If lead is less than 0xA1, return error with code point.

  * Avoid returning Hong Kong Supplementary Character Set extensions literally.

Anyway, I found another problematic character: 

U+5345 has the same problem (at least, it's incompatible with Chrome's ICU -

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