Bug#359006: xterm: unicode glyph rendering glitch

[Andrew Pimlott <andrew@pimlott.net>]

Package: xterm
Version: 210-2
Severity: minor

Unicode characters generally render properly in my xterm, using
LANG=en_US.UTF-8, however I just noticed a glitch.  When U+2218 is
rendered in some colors, it turns into the dashed box that usually
denotes a bad character.  To reproduce:

- start vim in an xterm, with LANG=en_US.UTF
- enter insert mode and type the sequence

    ctrl-V u2218

  You should see a nice function composition symbol, U+2218: ∘
- Now colorise it by typing ":set ft=mail" and then entering "> " before
  the symbol.  When it changes color, it turns into a dashed box.

If I cut and past it into another application, it shows up correctly as
a function composition symbol, so xterm clearly still knows what it
should be; it just doesn't render it properly.  Also, I don't see the
same problem with most other unicode characters, but it does seem to
afflict others in the same range.

Andrew

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages xterm depends on:
ii  libc6                     2.3.6-4        GNU C Library: Shared libraries an
ii  libfontconfig1            2.3.2-5        generic font configuration library
ii  libice6                   6.9.0.dfsg.1-5 Inter-Client Exchange library
ii  libncurses5               5.5-1          Shared libraries for terminal hand
ii  libsm6                    6.9.0.dfsg.1-5 X Window System Session Management
ii  libx11-6                  6.9.0.dfsg.1-5 X Window System protocol client li
ii  libxaw7                   6.9.0.dfsg.1-5 X Athena widget set library
ii  libxext6                  6.9.0.dfsg.1-5 X Window System miscellaneous exte
ii  libxft2                   2.1.8.2-5.1    FreeType-based font drawing librar
ii  libxmu6                   6.9.0.dfsg.1-5 X Window System miscellaneous util
ii  libxt6                    6.9.0.dfsg.1-5 X Toolkit Intrinsics
ii  xlibs-data                6.9.0.dfsg.1-5 X Window System client data

Versions of packages xterm recommends:
ii  xutils                    6.9.0.dfsg.1-5 X Window System utility programs

-- no debconf information