Byteman includes catch handling code in transformed methods for its own internal exception class ExecuteException and its two subclasses ThrowException and ReturnException. When verbose mode is enabled Byteman tweaks these handlers to inject a call to System.out.println, enabling the exception flow to be traced. If the rule being injected has an AT/AFTER CALL location that matches this injected call then Byteman may in some circumstances try to inject the rule into the handler.

n.b. the AT CALL rule needs to match ALL target locations for this error to happen.