debian/changelog

+antlr4 (4.7.1-2) UNRELEASED; urgency=medium
+
+  * Adding /usr/share/java/treelayout.jar to CLASSPATH in grun (Closes: #902230).
+
+ -- Andrius Merkys <andrius.merkys@gmail.com>  Wed, 02 Jan 2019 06:04:26 -0500
+
 antlr4 (4.7.1-1) unstable; urgency=medium
 
   * Team upload.

debian/scripts/grun

 #!/bin/sh
 
-CLASSPATH=.:/usr/share/java/antlr4.jar:/usr/share/java/antlr4-runtime.jar
+CLASSPATH=.:/usr/share/java/antlr4.jar:/usr/share/java/antlr4-runtime.jar:/usr/share/java/treelayout.jar
 exec java -cp $CLASSPATH org.antlr.v4.gui.TestRig "$@"