Attempting to make a function that takes in a list results in GUI crash

Attempting to make function "+ void renderingFunction(List<Object> objects)" results in program crash.

Exception in thread "Animation Thread" java.lang.IllegalStateException: No match found at java.util.regex.Matcher.group(Unknown Source) at ca.mcgill.ram.ui.handler.impl.ClassViewHandler.getParameter(ClassViewHandler.java:197) at ca.mcgill.ram.ui.handler.impl.ClassViewHandler.getParameters(ClassViewHandler.java:216) at ca.mcgill.ram.ui.handler.impl.ClassViewHandler.createOperation(ClassViewHandler.java:185) at ca.mcgill.ram.ui.handler.impl.ClassViewHandler.access$1(ClassViewHandler.java:173) at ca.mcgill.ram.ui.handler.impl.ClassViewHandler$2.verifyKeyboardDismissed(ClassViewHandler.java:114) at ca.mcgill.ram.ui.components.RamKeyboard.dimissKeyboard(RamKeyboard.java:752) at ca.mcgill.ram.ui.components.RamTextComponent.appendCharByUnicode(RamTextComponent.java:225) at ca.mcgill.ram.ui.components.RamKeyboard.keyPressed(RamKeyboard.java:538) at ca.mcgill.ram.ui.components.RamKeyboard.keyPressed(RamKeyboard.java:499) at org.mt4j.AbstractMTApplication.fireKeyPressed(AbstractMTApplication.java:1000) at org.mt4j.AbstractMTApplication.keyPressed(AbstractMTApplication.java:988) at processing.core.PApplet.handleKeyEvent(PApplet.java:1968) at ca.mcgill.ram.RamApp.handleKeyEvent(RamApp.java:413) at processing.core.PApplet.dequeueKeyEvents(PApplet.java:1951) at processing.core.PApplet.handleDraw(PApplet.java:1615) at processing.core.PApplet.run(PApplet.java:1502) at java.lang.Thread.run(Unknown Source)

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