From 8a521515ce88802846df8884cabdd3966d0f32a8 Mon Sep 17 00:00:00 2001
From: Daniel Shahaf <d.s@daniel.shahaf.name>
Date: Tue, 13 Apr 2021 13:56:36 +0000
Subject: [PATCH 1/2] vcs_info git docs: ahead/behind commits: Don't run
 rev-list when that would fail

---
 Misc/vcs_info-examples | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Misc/vcs_info-examples b/Misc/vcs_info-examples
index d33d0ceed..065ea6cb3 100644
--- a/Misc/vcs_info-examples
+++ b/Misc/vcs_info-examples
@@ -179,6 +179,9 @@ function +vi-git-st() {
     local ahead behind
     local -a gitstatus
 
+    # Exit early in case the worktree is on a detached HEAD
+    git rev-parse ${hook_com[branch]}@{upstream} >/dev/null 2>&1 || return 0
+
     ahead=$(git rev-list --count ${hook_com[branch]}@{upstream}..HEAD 2>/dev/null)
     (( $ahead )) && gitstatus+=( "+${ahead}" )