very large sequences cause buffer overflow when passing instructions to Jmol

Reproduce by:
Import structure 3i8f, and try to view the first, and then the second RNA chain.
The following exception is raised:

Exception in thread "Thread-43" java.lang.StringIndexOutOfBoundsException: String index out of range: -65517
at java.lang.String.substring(String.java:1937)
at org.jmol.viewer.Eval.getCommand(Eval.java:861)
at org.jmol.viewer.Eval.instructionDispatchLoop(Eval.java:491)
at org.jmol.viewer.Eval.runEval(Eval.java:110)
at org.jmol.viewer.Viewer.evalStringWaitStatus(Viewer.java:2573)
at org.jmol.viewer.ScriptManager.runScript(ScriptManager.java:130)
at org.jmol.viewer.ScriptManager.runNextScript(ScriptManager.java:119)
at org.jmol.viewer.ScriptManager$ScriptQueueRunnable.run(ScriptManager.java:147)
at java.lang.Thread.run(Thread.java:619)