Git subtree pull fatal error reproduce

#!/bin/bash

echo ''
echo '-- Create the library repository.'
echo ''

mkdir repoLib
cd repoLib
git init
echo test > test.txt
git add .
git commit -m 'Adding test.txt'
cd ..

echo ''
echo '-- Create a bare repository that we can push into (emulating what we are doing in gitolite).'
echo ''

mkdir repoMain_Server
cd repoMain_Server
git init --bare
cd ..

echo ''
echo '-- Clone the server repository.'
echo ''

git clone repoMain_Server repoMain
cd repoMain

echo ''
echo '-- Write a file and push to the server repo.'
echo ''

echo test > test2.txt
git add .
git commit -m 'Adding test2.txt'
git push origin master

echo ''
echo '-- subtree add the library repository and push the results to the server.  If --squash is removed everything will work.'
echo ''

git subtree add -P Subtree/librepoLib --squash ../repoLib master
git push origin master
cd ..

echo ''
echo '-- clone the main repo and attempt to split out Subtree/librepoLib, should succeed'
echo ''

git clone repoMain repoMainClone
cd repoMainClone
git subtree split -P Subtree/librepoLib -b libABranch
cd ..

echo ''
echo '-- pull the main repo and attempt to split out Subtree/librepoLib, should error (fatal: bad object ...)'
echo ''

mkdir repoMainPull
cd repoMainPull
git init
git pull ../repoMain
git subtree split -P Subtree/librepoLib -b libABranch
cd ..

echo ''
echo '-- clone the server repository as if we were a separate user on a separate computer.'
echo '-- attempt to split out Subtree/librepoLib, should error (fatal: bad object ...)'
echo ''

git clone repoMain_Server repoMain_ServerWorking
cd repoMain_ServerWorking
git subtree split -P Subtree/librepoLib -b libABranch