From 181f32d80a9fb7887e93666b2f1ef10d62622789 Mon Sep 17 00:00:00 2001
From: Adrien Hopkins <adrien.p.hopkins@gmail.com>
Date: Sun, 14 Apr 2019 16:18:20 -0400
Subject: Bugfix: Entering an empty string into To no longer crashes.

---
 src/org/unitConverter/converterGUI/UnitConverterGUI.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/org/unitConverter/converterGUI/UnitConverterGUI.java b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
index aecb64f..1f59e3a 100755
--- a/src/org/unitConverter/converterGUI/UnitConverterGUI.java
+++ b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
@@ -216,6 +216,10 @@ final class UnitConverterGUI {
 				this.view.showErrorDialog("Parse Error", "Please enter a unit expression in the From: box.");
 				return;
 			}
+			if (toUnitString.isEmpty()) {
+				this.view.showErrorDialog("Parse Error", "Please enter a unit expression in the To: box.");
+				return;
+			}
 
 			// try to parse from
 			final Unit from;
-- 
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