Merge pull request #16452 from MikeMcQuaid/brew_upgrade_completions

completions: ignore errors on cask list generation.

Library/Homebrew/completions/bash.erb

@@ -88,7 +88,7 @@ __brew_complete_outdated_formulae() {
 __brew_complete_outdated_casks() {
   local cur="${COMP_WORDS[COMP_CWORD]}"
   local outdated_casks
-  outdated_casks="$(brew outdated --cask --quiet)"
+  outdated_casks="$(brew outdated --cask --quiet 2>/dev/null)"
   while read -r line; do COMPREPLY+=("${line}"); done < <(compgen -W "${outdated_casks}" -- "${cur}")
 }
 

Library/Homebrew/completions/zsh.erb

@@ -98,7 +98,7 @@ __brew_installed_casks() {
 
   local -a list
   local expl
-  list=( $(brew list --cask) )
+  list=( $(brew list --cask 2>/dev/null) )
   _wanted list expl 'installed casks' compadd -a list
 }
 
@@ -106,7 +106,7 @@ __brew_outdated_casks() {
   [[ -prefix '-' ]] && return 0
 
   local -a casks
-  casks=($(brew outdated --cask))
+  casks=($(brew outdated --cask 2>/dev/null))
   _describe -t casks 'outdated casks' casks
 }