This only happened on one specific repository I have, doesn't happen in other repos.
```
[2015-05-07 14:55:43] ERROR 2: max(): Array must contain at least one element at [/Users/cspeck/Projects/phacility/arcanist/src/workflow/ArcanistFeatureWorkflow.php:332]
arcanist(head=master, ref.master=8919a9c5b55e), phutil(head=master, ref.master=cb8cdccb1a50)
#0 max(array) called at [<arcanist>/src/workflow/ArcanistFeatureWorkflow.php:332]
#1 ArcanistFeatureWorkflow::printBranches(array, array) called at [<arcanist>/src/workflow/ArcanistFeatureWorkflow.php:94]
#2 ArcanistFeatureWorkflow::run() called at [<arcanist>/scripts/arcanist.php:378]
[2015-05-07 14:55:43] ERROR 2: max(): Array must contain at least one element at [/Users/cspeck/Projects/phacility/arcanist/src/workflow/ArcanistFeatureWorkflow.php:333]
arcanist(head=master, ref.master=8919a9c5b55e), phutil(head=master, ref.master=cb8cdccb1a50)
#0 max(array) called at [<arcanist>/src/workflow/ArcanistFeatureWorkflow.php:333]
#1 ArcanistFeatureWorkflow::printBranches(array, array) called at [<arcanist>/src/workflow/ArcanistFeatureWorkflow.php:94]
#2 ArcanistFeatureWorkflow::run() called at [<arcanist>/scripts/arcanist.php:378]
```
Arcanist on my machine is at 6f7bedaceb6857a084b4914679a43fdedfb720da
I'm not sure what information you would want about my repo, but here's some exploratory output:
```
host128:product cspeck$ hg book
master 93075:745f2fa99cb7
host128:product cspeck$ hg head
changeset: 93076:166ff857f1e5
tag: tip
user: cspeck
date: Wed May 06 16:10:58 2015 -0400
summary: Task #12345 - Cleaned up the report template wizard which was also leaking report.
host128:product cspeck$ hg par
changeset: 93076:166ff857f1e5
tag: tip
user: cspeck
date: Wed May 06 16:10:58 2015 -0400
summary: Task #12345 - Cleaned up the report template wizard which was also leaking report.
host128:product cspeck$ hg out
comparing with ssh://machine/repos/release-6.5/product
searching for changes
changeset: 93076:166ff857f1e5
tag: tip
user: cspeck
date: Wed May 06 16:10:58 2015 -0400
summary: Task #12345 - Cleaned up the report template wizard which was also leaking report.
host128:product cspeck$ cat .arcconfig
{
"project.name" : "product release-6.5",
"phabricator.uri" : "https://repo.mycompany.com/",
"repository.callsign" : "PRODUCT",
"history.immutable" : false,
"arc.land.onto.default" : "master"
}
host128:product cspeck$ hg glog -l 3 --template="{node}"
@ 166ff857f1e5469a4964196480c77348d6aa9578
|
o 745f2fa99cb711a38d98abd739d7eeb7aab5e2c1
|
o 401ad66dae4fa07570f5f09126ab87ee153f9c2b
|
```