From 99e308753b9d5c501a92fc225c2eca1ba634d298 Mon Sep 17 00:00:00 2001
From: Maxim Belkin <maxim.belkin@gmail.com>
Date: Mon, 4 Nov 2019 09:56:03 -0600
Subject: [PATCH 1/4] bin/brew: unset functions that override builtins

Also, enable all Bash builtins
---
 bin/brew | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bin/brew b/bin/brew
index 77bcb906f7..c088bfcd12 100755
--- a/bin/brew
+++ b/bin/brew
@@ -19,6 +19,13 @@ symlink_target_directory() {
   quiet_cd "$directory" && quiet_cd "$target_dirname" && pwd -P
 }
 
+for cmd in $(compgen -A builtin)
+do
+  unset -f $cmd  # Unset functions that override Bash builtins
+  enable $cmd # Enable all Bash builtins
+done
+unset cmd
+
 BREW_FILE_DIRECTORY="$(quiet_cd "${0%/*}/" && pwd -P)"
 HOMEBREW_BREW_FILE="${BREW_FILE_DIRECTORY%/}/${0##*/}"
 HOMEBREW_PREFIX="${HOMEBREW_BREW_FILE%/*/*}"

From 7349178adcd32d0ebc301d7683a8353babfab37d Mon Sep 17 00:00:00 2001
From: Maxim Belkin <maxim.belkin@gmail.com>
Date: Mon, 4 Nov 2019 10:18:53 -0600
Subject: [PATCH 2/4] move comments outside the 'for cmd' loop

---
 bin/brew | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/bin/brew b/bin/brew
index c088bfcd12..c9a881fa32 100755
--- a/bin/brew
+++ b/bin/brew
@@ -19,10 +19,12 @@ symlink_target_directory() {
   quiet_cd "$directory" && quiet_cd "$target_dirname" && pwd -P
 }
 
+# Unset functions that override Bash builtins
+# Enable all Bash builtins
 for cmd in $(compgen -A builtin)
 do
-  unset -f $cmd  # Unset functions that override Bash builtins
-  enable $cmd # Enable all Bash builtins
+  unset -f $cmd
+  enable $cmd
 done
 unset cmd
 

From d0d150ace2a49326122ef60ac4604a4f8e098865 Mon Sep 17 00:00:00 2001
From: Maxim Belkin <maxim.belkin@gmail.com>
Date: Mon, 4 Nov 2019 10:40:53 -0600
Subject: [PATCH 3/4] attempt at rewording the explanatory comment

---
 bin/brew | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/bin/brew b/bin/brew
index c9a881fa32..fd80d71165 100755
--- a/bin/brew
+++ b/bin/brew
@@ -19,8 +19,7 @@ symlink_target_directory() {
   quiet_cd "$directory" && quiet_cd "$target_dirname" && pwd -P
 }
 
-# Unset functions that override Bash builtins
-# Enable all Bash builtins
+# Enable and use default Bash builtins rather than user-defined functions
 for cmd in $(compgen -A builtin)
 do
   unset -f $cmd

From c87d2181269777b64eadb74020de50a57bb05a64 Mon Sep 17 00:00:00 2001
From: Maxim Belkin <maxim.belkin@gmail.com>
Date: Mon, 4 Nov 2019 11:21:13 -0600
Subject: [PATCH 4/4] re-enable disabled builtins and use them

---
 bin/brew | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/bin/brew b/bin/brew
index fd80d71165..5831791a75 100755
--- a/bin/brew
+++ b/bin/brew
@@ -20,10 +20,11 @@ symlink_target_directory() {
 }
 
 # Enable and use default Bash builtins rather than user-defined functions
-for cmd in $(compgen -A builtin)
+builtin enable compgen unset
+for cmd in $(builtin compgen -A builtin)
 do
-  unset -f $cmd
-  enable $cmd
+  builtin unset -f $cmd
+  builtin enable $cmd
 done
 unset cmd