diff --git a/contrib/bash_completion b/contrib/bash_completion
--- a/contrib/bash_completion
+++ b/contrib/bash_completion
@@ -56,7 +56,7 @@ shopt -s extglob
 
 _hg_paths()
 {
-    local paths="$(hg paths | sed -e 's/ = .*$//')"
+    local paths="$(hg paths 2> /dev/null | sed -e 's/ = .*$//')"
     COMPREPLY=(${COMPREPLY[@]:-} $( compgen -W '$paths' -- "$cur" ))
 }
 
@@ -70,13 +70,14 @@ shopt -s extglob
 
 _hg_status()
 {
-    local files="$( hg status -n$1 . )"
+    local files="$( hg status -n$1 . 2> /dev/null)"
     COMPREPLY=(${COMPREPLY[@]:-} $( compgen -W '$files' -- "$cur" ))
 }
 
 _hg_tags()
 {
-    local tags="$(hg tags | sed -e 's/[0-9]*:[a-f0-9]\{40\}$//; s/ *$//')"
+    local tags="$(hg tags 2> /dev/null |
+                      sed -e 's/[0-9]*:[a-f0-9]\{40\}$//; s/ *$//')"
     COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -W '$tags' -- "$cur") )
 }
 
@@ -145,7 +146,7 @@ shopt -s extglob
     fi
 
     # canonicalize command name
-    cmd=$(hg -q help "$cmd" | sed -e 's/^hg //; s/ .*//; 1q')
+    cmd=$(hg -q help "$cmd" 2> /dev/null | sed -e 's/^hg //; s/ .*//; 1q')
 
     if [ "$cmd" != status ] && [ "$prev" = -r ] || [ "$prev" = --rev ]; then
 	_hg_tags