disabling debugger in production

[Vibhu Mohindra]

I'm bundling up a program for distribution to customers. I don't want it
to ever enter the debugger. I want it to raise Java exceptions instead.

What I've written to achieve this follows. I've observed it working.
However, there are still times when my program enters the debugger. I
can't tell why, and want to prevent it entirely. Does anybody know? Does
anyone on this list distribute ABCL applications to end users, and how
do you disable the debugger?

/* disable the debugger. raise a RuntimeException instead */
static void installDebuggerHook() {
  Symbol.DEBUGGER_HOOK
  .setSymbolValue(new Function() {
                    public LispObject execute(LispObject c, LispObject h) {
                      throw translateCondition(c);}});
}
static RuntimeException translateCondition(LispObject c) {
  return new RuntimeException(
               c instanceof Condition
                 ? String.format("%s: %s",
                                 c.princToString(),
                                 ((Condition) c).getConditionReport())
                 : c.princToString());
}

My program is really a Lisp library that people will use via a thin Java
layer. I have a hunch that the above takes care of errors that occur in:
  interpreter.eval("...")
but not errors that occur in:
  someSymbol.execute(...)

Thanks in advance,

Vibhu