From d2ace367349e2bd0cde50e305885c922a099e356 Mon Sep 17 00:00:00 2001
From: grimes2 <juergen.lange@unitybox.de>
Date: Sat, 27 Aug 2016 14:26:58 +0200
Subject: [PATCH] Error setting field freeze (#1863)

* Error setting field freeze

* Update EntryEditor.java

* Background color

* Typo

* Another Typo

* color before if

* CHANGELOG edited
---
 CHANGELOG.md                                              | 1 +
 .../java/net/sf/jabref/gui/entryeditor/EntryEditor.java   | 8 +++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 55d463217b56..b6039538cf20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 
 ### Fixed
 - Fixed NullPointerException when opening search result window for an untitled database 
+- Fixed #1757: Crash after saving illegal argument in entry editor
 
 ### Removed
 - The non-supported feature of being able to define file directories for any extension is removed. Still, it should work for older databases using the legacy `ps` and `pdf` fields, although we strongly encourage using the `file` field. 
diff --git a/src/main/java/net/sf/jabref/gui/entryeditor/EntryEditor.java b/src/main/java/net/sf/jabref/gui/entryeditor/EntryEditor.java
index efabcfbdc0c2..fa39d7f3d0dc 100644
--- a/src/main/java/net/sf/jabref/gui/entryeditor/EntryEditor.java
+++ b/src/main/java/net/sf/jabref/gui/entryeditor/EntryEditor.java
@@ -1208,10 +1208,12 @@ public void actionPerformed(ActionEvent event) {
                         updateSource();
                         panel.markBaseChanged();
                     } catch (IllegalArgumentException ex) {
-                        JOptionPane.showMessageDialog(frame, Localization.lang("Error") + ": " + ex.getMessage(),
-                                Localization.lang("Error setting field"), JOptionPane.ERROR_MESSAGE);
                         fieldEditor.setInvalidBackgroundColor();
-                        LOGGER.debug("Error setting field", ex);
+                        if (!SwingUtilities.isEventDispatchThread()) {
+                            JOptionPane.showMessageDialog(frame, Localization.lang("Error") + ": " + ex.getMessage(),
+                                Localization.lang("Error setting field"), JOptionPane.ERROR_MESSAGE);
+                            LOGGER.debug("Error setting field", ex);
+                        }
                     }
                 } else {
                     // set == false