Index: /applications/editors/josm/plugins/build-common.xml
===================================================================
--- /applications/editors/josm/plugins/build-common.xml	(revision 35711)
+++ /applications/editors/josm/plugins/build-common.xml	(revision 35712)
@@ -58,4 +58,5 @@
     <condition property="isJava12"><matches string="${ant.java.version}" pattern="1[2-9]" /></condition>
     <condition property="isJava13"><matches string="${ant.java.version}" pattern="1[3-9]" /></condition>
+    <condition property="isJava14"><matches string="${ant.java.version}" pattern="1[4-9]" /></condition>
     <condition property="isJava16"><matches string="${ant.java.version}" pattern="1[6-9]" /></condition>
     <!-- Disable jacoco on Java 16+, see https://github.com/jacoco/jacoco/pull/992 -->
@@ -617,4 +618,5 @@
                         <jvmarg value="--add-exports" if:set="isJava9" />
                         <jvmarg value="java.desktop/com.sun.imageio.spi=ALL-UNNAMED" if:set="isJava9" />
+                        <jvmarg value="-XX:+ShowCodeDetailsInExceptionMessages" if:set="isJava14" />
                         <sysproperty key="josm.home" value="../00_core_test_config/unit-josm.home"/>
                         <sysproperty key="josm.test.data" value="${plugin.test.dir}/data"/>