12133: Protect completion system from stray error output and assorted fatal

errors when expanding strings taken from the command line.

ChangeLog

@@ -1,3 +1,10 @@
+2000-07-02  Bart Schaefer  <schaefer@zsh.org>
+
+	* 12133: Completion/Core/_expand, Completion/Core/_path_files:
+	Discard error output from parameter expansions and use "eval" to
+	protect the completion system from parse errors and other garbage
+	in the strings taken from the command line.
+
 2000-06-29  Sven Wischnowsky  <wischnow@zsh.org>
 
 	* 12125: Src/parse.c, Test/09funcdef.ztst: fix for `foo () print

Completion/Core/_expand

@@ -63,7 +63,7 @@ if [[ "$force" = *s* ]] ||
       eval exp\=\( ${${(q)exp}:gs/\\{/\{/:gs/\\}/\}/} \)
   exp=( ${${(e)exp//\\[ 	
 ]/ }//(#b)([ 	
-])/\\$match[1]} )
+])/\\$match[1]} ) 2>/dev/null
 else
   exp=( ${exp:s/\\\$/\$} )
 fi
@@ -77,7 +77,7 @@ subd=("$exp[@]")
 # Now try globbing.
 
 [[ "$force" = *g* ]] || zstyle -T ":completion:${curcontext}:" glob &&
-    exp=( ${~exp} )
+    eval 'exp=( ${~exp} )' 2>/dev/null
 
 # If we don't have any expansions or only one and that is the same
 # as the original string, we let other completers run.

Completion/Core/_path_files

@@ -322,7 +322,7 @@ for prepath in "$prepaths[@]"; do
     else
       compfiles -p$cfopt tmp1 accex "$skipped" "$_matcher" '' fake "$pats[@]"
     fi
-    tmp1=( $~tmp1 )
+    eval 'tmp1=( $~tmp1 )' 2>/dev/null
 
     if [[ -n "$PREFIX$SUFFIX" ]]; then
       # See which of them match what's on the line.