From 4c7d33fc5a63a767be00b9f0460e6c2ceb0ddd67 Mon Sep 17 00:00:00 2001
From: Tres Finocchiaro <tres.finocchiaro@gmail.com>
Date: Fri, 7 Jan 2022 11:25:44 -0500
Subject: [PATCH] Guard empty printer tray names Closes #904

---
 src/qz/printer/PrintOptions.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/qz/printer/PrintOptions.java b/src/qz/printer/PrintOptions.java
index 5714ab177..84e01250b 100644
--- a/src/qz/printer/PrintOptions.java
+++ b/src/qz/printer/PrintOptions.java
@@ -314,6 +314,10 @@ public PrintOptions(JSONObject configOpts, PrintOutput output, PrintingUtilities
         }
         if (!configOpts.isNull("printerTray")) {
             psOptions.printerTray = configOpts.optString("printerTray", null);
+            // Guard empty string value; will break pattern matching
+            if(psOptions.printerTray != null && psOptions.printerTray.trim().equals("")) {
+                psOptions.printerTray = null;
+            }
         }
         if (!configOpts.isNull("rasterize")) {
             try { psOptions.rasterize = configOpts.getBoolean("rasterize"); }