xserver bug?

Charles Wilson cygwin@cwilson.fastmail.fm
Tue Jan 19 23:59:00 GMT 2010

I've noticed that with XWin 1.7.3 (and perhaps earlier versions; not
sure), the key combination CTRL-SHIFT-0 (zero) doesn't generate any
events.  CTRL-SHIFT-1 thru -9, alphabetic keys, no problem -- just not zero.

This came up as I was testing the new rxvt-unicode release; it has a
special "ISO14755" entry mode, where you hold down CTRL-SHIFT and type
the unicode value (in hex) of the codepoint you want, and then release
the CTRL-SHIFT keys -- urxvt inserts the correct character. This works
-- as long as the unicode value doesn't contain 0.

e.g. CTRL-SHIFT 3-b-2 gives 'beta'
     CTRL-SHIFT 2-0-a-c should be the Euro symbol, but the '0' never has
any effect.

As I said, you can verify this behavior (this missing 0 events) using
xev, so it's not specific to rxvt-unicode.

Is this a bug, or a designed behavior, in XWin?


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