We believe that your issue has been closed by the upload of
Version 0.9.4 of grml-etc-core from Michael Prokop <mika@grml.org>.
The explanation is attached below

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Hash: SHA1

Format: 1.8
Date: Sat, 19 Apr 2014 15:44:35 +0200
Source: grml-etc-core
Binary: grml-etc-core
Architecture: source all
Version: 0.9.4
Distribution: grml-testing
Urgency: medium
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml-etc-core - core etcetera files for the grml system
Changes: 
 grml-etc-core (0.9.4) grml-testing; urgency=medium
 .
   [ Erik Bernstein ]
   * [46c723f] zshrc: introduce variable for the compdump file
     [Closes: issue1275]
 .
   [ Frank Terbeck ]
   * [5afe1a2] Make ‘egrep’ use the same options as ‘grep’
     [Closes: issue1230]
   * [1317ff5] zshrc: Make options of gpasswd complete via _gnu_generic
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Hey, I'd like to close this bug report. Do we want to apply the patch as it is?

Right. How about this patch?


diff --git a/etc/zsh/zshrc b/etc/zsh/zshrc
index 50fac90..61fd010 100644
--- a/etc/zsh/zshrc
+++ b/etc/zsh/zshrc
@@ -2412,8 +2412,13 @@ modified() {
 check_com new || alias new=modified
 
 # use colors when GNU grep with color-support
-#a2# Execute \kbd{grep -{}-color=auto}
-(( $#grep_options > 0 )) && alias grep='grep '${grep_options:+"${grep_options[*]}"}
+if (( $#grep_options > 0 )); then
+    o=${grep_options:+"${grep_options[*]}"}
+    #a2# Execute \kbd{grep -{}-color=auto}
+    alias grep='grep '$o
+    alias egrep='egrep '$o
+    unset o
+fi
 
 # Translate DE<=>EN
 # 'translate' looks up fot a word in a file with language-to-language


-- 
In protocol design, perfection has been reached not when there is
nothing left to add, but when there is nothing left to take away.
                                                  -- RFC 1925

Hello.

_grep --color=auto_ dont work with _egrep_
I fixed it with string:
(( $#grep_options > 0 )) && alias egrep='egrep 
'${grep_options:+"${grep_options[*]}"}

after that colors work normally with egrep.