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bug#11003: Emacs-24 Hangs When Displaying Unicode #x6c0 (ARABIC HEH WITH


From: Achim Gratz
Subject: bug#11003: Emacs-24 Hangs When Displaying Unicode #x6c0 (ARABIC HEH WITH YEH ABOVE) -- gdb backtrace
Date: Tue, 13 Mar 2012 22:16:03 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.94 (gnu/linux)

Achim Gratz <address@hidden> writes:
> M-x describe-face

With Monospace 12 it already replaces the font (which is probably why it
takes so long for the glyph to show up on first try) and apparently
decomposes, too:

M-x describe-char

             position: 193 of 194 (99%), column: 1
            character: ۀ‎ (displayed as ۀ‎) (codepoint 1728, #o3300, #x6c0)
    preferred charset: unicode (Unicode (ISO10646))
code point in charset: 0x06C0
               syntax: w        which means: word
             category: .:Base, R:Right-to-left (strong), b:Arabic
          buffer code: #xDB #x80
            file code: #xDB #x80 (encoded by coding system utf-8-unix)
              display: by this font (glyph code)
    xft:-b&h-Lucida Sans 
Typewriter-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1 (#x3A2)

Character code properties: customize what to show
  name: ARABIC LETTER HEH WITH YEH ABOVE
  old-name: ARABIC LETTER HAMZAH ON HA
  general-category: Lo (Letter, Other)
  decomposition: (1749 1620) ('ە' 'ٔ')

There are text properties here:
  fontified            t

If I start emacs with "Fixed", it choses a different replacement font:

             position: 193 of 195 (98%), column: 1
            character: ۀ‎ (displayed as ۀ‎) (codepoint 1728, #o3300, #x6c0)
    preferred charset: unicode (Unicode (ISO10646))
code point in charset: 0x06C0
               syntax: w        which means: word
             category: .:Base, R:Right-to-left (strong), b:Arabic
          buffer code: #xDB #x80
            file code: #xDB #x80 (encoded by coding system utf-8-unix)
              display: by this font (glyph code)
    x:-mutt-clearlyu-medium-r-normal--17-120-100-100-p-123-iso10646-1 (#x6C0)

Character code properties: customize what to show
  name: ARABIC LETTER HEH WITH YEH ABOVE
  old-name: ARABIC LETTER HAMZAH ON HA
  general-category: Lo (Letter, Other)
  decomposition: (1749 1620) ('ە' 'ٔ')

There are text properties here:
  fontified            t
  rear-nonsticky       t


HTH,
Achim.
-- 
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